[BUG] unsupported "grep -P" in nftables.conf #41
Description
Is there an existing issue for this?
- I have searched the existing issues
Current Behavior
On shutdown, when fail2ban stops jails, which use nftables, it executes "grep -P".
However, "-P" is not supported in the grep version included in the latest docker image. (Linuxserver.io version:- 1.1.0-r2-ls27 Build-date:- 2025-12-19T07:37:52+00:00)
nftables.conf line 57
_nft_get_handle_id = grep -oP '@<addr_set>\s+.*\s+\Khandle\s+(\d+)$'
Expected Behavior
grep version should support -P
Steps To Reproduce
- configure a jail to use nftables, e.g.:
[nginx-418]
enabled = true
port = http
action = nftables[type=allports]
logpath = %(nginx_access_log)s
maxretry = 0
- start fail2ban container
- ban an IP
- stop or restart fail2ban container
Environment
- OS: Ubuntu 24.04.3 LTS
- How docker service was installed: snapCPU architecture
x86-64
Docker creation
docker run -d --name=fail2ban --network container:wireguard --cap-add=NET_ADMIN --cap-add=NET_RAW --restart=unless-stopped -e PUID=1000 -e PGID=1000 -v fail2ban:/config -v proxy-logs:/remotelogs/nginx:ro lscr.io/linuxserver/fail2banContainer logs
2026-02-05 16:56:28,856 fail2ban.actions [154]: NOTICE [nginx-forbidden] Flush ticket(s) with nftables
2026-02-05 16:56:28,893 fail2ban.utils [154]: ERROR 70102dbea910 -- exec: { nft flush set inet f2b-table addr-set-nginx-bad-request 2> /dev/null; } || {
{ nft -a list chain inet f2b-table f2b-chain | grep -oP '@addr-set-nginx-bad-request\s+.*\s+\Khandle\s+(\d+)$'; } | while read -r hdl; do
nft delete rule inet f2b-table f2b-chain $hdl; done
nft delete set inet f2b-table addr-set-nginx-bad-request
nft add set inet f2b-table addr-set-nginx-bad-request \{ type ipv4_addr\; flags interval\; \}
nft add rule inet f2b-table f2b-chain meta l4proto \{ tcp \} ip saddr @addr-set-nginx-bad-request reject
}
2026-02-05 16:56:28,893 fail2ban.utils [154]: ERROR 70102dbea910 -- stderr: 'grep: unrecognized option: P'
2026-02-05 16:56:28,893 fail2ban.utils [154]: ERROR 70102dbea910 -- stderr: 'Error: No such file or directory'
2026-02-05 16:56:28,893 fail2ban.utils [154]: ERROR 70102dbea910 -- stderr: 'list chain inet f2b-table f2b-chain'
2026-02-05 16:56:28,893 fail2ban.utils [154]: ERROR 70102dbea910 -- stderr: ' ^^^^^^^^^'
2026-02-05 16:56:28,893 fail2ban.utils [154]: ERROR 70102dbea910 -- stderr: 'BusyBox v1.37.0 (2025-11-23 13:10:04 UTC) multi-call binary.'
2026-02-05 16:56:28,894 fail2ban.utils [154]: ERROR 70102dbea910 -- stderr: ''
2026-02-05 16:56:28,894 fail2ban.utils [154]: ERROR 70102dbea910 -- stderr: 'Usage: grep [-HhnlLoqvsrRiwFE] [-m N] [-A|B|C N] { PATTERN | -e PATTERN... | -f FILE... } [FILE]...'
2026-02-05 16:56:28,894 fail2ban.utils [154]: ERROR 70102dbea910 -- stderr: ''
2026-02-05 16:56:28,894 fail2ban.utils [154]: ERROR 70102dbea910 -- stderr: 'Search for PATTERN in FILEs (or stdin)'
2026-02-05 16:56:28,894 fail2ban.utils [154]: ERROR 70102dbea910 -- stderr: ''
2026-02-05 16:56:28,894 fail2ban.utils [154]: ERROR 70102dbea910 -- stderr: "\t-H\tAdd 'filename:' prefix"
2026-02-05 16:56:28,894 fail2ban.utils [154]: ERROR 70102dbea910 -- stderr: "\t-h\tDo not add 'filename:' prefix"
2026-02-05 16:56:28,894 fail2ban.utils [154]: ERROR 70102dbea910 -- stderr: "\t-n\tAdd 'line_no:' prefix"
2026-02-05 16:56:28,894 fail2ban.utils [154]: ERROR 70102dbea910 -- stderr: '\t-l\tShow only names of files that match'
2026-02-05 16:56:28,894 fail2ban.utils [154]: ERROR 70102dbea910 -- stderr: "\t-L\tShow only names of files that don't match"
2026-02-05 16:56:28,894 fail2ban.utils [154]: ERROR 70102dbea910 -- stderr: '\t-c\tShow only count of matching lines'
2026-02-05 16:56:28,894 fail2ban.utils [154]: ERROR 70102dbea910 -- stderr: '\t-o\tShow only the matching part of line'
2026-02-05 16:56:28,894 fail2ban.utils [154]: ERROR 70102dbea910 -- stderr: '\t-q\tQuiet. Return 0 if PATTERN is found, 1 otherwise'
2026-02-05 16:56:28,895 fail2ban.utils [154]: ERROR 70102dbea910 -- stderr: '\t-v\tSelect non-matching lines'
2026-02-05 16:56:28,895 fail2ban.utils [154]: ERROR 70102dbea910 -- stderr: '\t-s\tSuppress open and read errors'
2026-02-05 16:56:28,895 fail2ban.utils [154]: ERROR 70102dbea910 -- stderr: '\t-r\tRecurse'
2026-02-05 16:56:28,895 fail2ban.utils [154]: ERROR 70102dbea910 -- stderr: '\t-R\tRecurse and dereference symlinks'
2026-02-05 16:56:28,895 fail2ban.utils [154]: ERROR 70102dbea910 -- stderr: '\t-i\tIgnore case'
2026-02-05 16:56:28,895 fail2ban.utils [154]: ERROR 70102dbea910 -- stderr: '\t-w\tMatch whole words only'
2026-02-05 16:56:28,895 fail2ban.utils [154]: ERROR 70102dbea910 -- stderr: '\t-x\tMatch whole lines only'
2026-02-05 16:56:28,895 fail2ban.utils [154]: ERROR 70102dbea910 -- stderr: '\t-F\tPATTERN is a literal (not regexp)'
2026-02-05 16:56:28,895 fail2ban.utils [154]: ERROR 70102dbea910 -- stderr: '\t-E\tPATTERN is an extended regexp'
2026-02-05 16:56:28,895 fail2ban.utils [154]: ERROR 70102dbea910 -- stderr: '\t-m N\tMatch up to N times per file'
2026-02-05 16:56:28,895 fail2ban.utils [154]: ERROR 70102dbea910 -- stderr: '\t-A N\tPrint N lines of trailing context'
2026-02-05 16:56:28,895 fail2ban.utils [154]: ERROR 70102dbea910 -- stderr: '\t-B N\tPrint N lines of leading context'
2026-02-05 16:56:28,895 fail2ban.utils [154]: ERROR 70102dbea910 -- stderr: "\t-C N\tSame as '-A N -B N'"
2026-02-05 16:56:28,896 fail2ban.utils [154]: ERROR 70102dbea910 -- stderr: '\t-e PTRN\tPattern to match'
2026-02-05 16:56:28,896 fail2ban.utils [154]: ERROR 70102dbea910 -- stderr: '\t-f FILE\tRead pattern from file'
2026-02-05 16:56:28,896 fail2ban.utils [154]: ERROR 70102dbea910 -- stderr: 'Error: Could not process rule: No such file or directory'
2026-02-05 16:56:28,896 fail2ban.utils [154]: ERROR 70102dbea910 -- stderr: 'delete set inet f2b-table addr-set-nginx-bad-request'
2026-02-05 16:56:28,896 fail2ban.utils [154]: ERROR 70102dbea910 -- stderr: ' ^^^^^^^^^'
2026-02-05 16:56:28,896 fail2ban.utils [154]: ERROR 70102dbea910 -- stderr: 'Error: No such file or directory'
2026-02-05 16:56:28,896 fail2ban.utils [154]: ERROR 70102dbea910 -- stderr: 'add set inet f2b-table addr-set-nginx-bad-request { type ipv4_addr; flags interval; }'
2026-02-05 16:56:28,896 fail2ban.utils [154]: ERROR 70102dbea910 -- stderr: ' ^^^^^^^^^'
2026-02-05 16:56:28,896 fail2ban.utils [154]: ERROR 70102dbea910 -- stderr: 'Error: No such file or directory'
2026-02-05 16:56:28,896 fail2ban.utils [154]: ERROR 70102dbea910 -- stderr: 'add rule inet f2b-table f2b-chain meta l4proto { tcp } ip saddr @addr-set-nginx-bad-request reject'
2026-02-05 16:56:28,896 fail2ban.utils [154]: ERROR 70102dbea910 -- stderr: ' ^^^^^^^^^'
2026-02-05 16:56:28,896 fail2ban.utils [154]: ERROR 70102dbea910 -- returned 1
2026-02-05 16:56:28,897 fail2ban.actions [154]: ERROR Failed to flush bans in jail 'nginx-bad-request' action 'nftables': Error flushing action Jail('nginx-bad-request')/nftables: 'Script error'
2026-02-05 16:56:28,897 fail2ban.actions [154]: INFO No flush occurred, do consistency check
2026-02-05 16:56:28,934 fail2ban.utils [154]: ERROR 70102cd44a90 -- exec: { nft flush set inet f2b-table addr-set-nginx-forbidden 2> /dev/null; } || {
{ nft -a list chain inet f2b-table f2b-chain | grep -oP '@addr-set-nginx-forbidden\s+.*\s+\Khandle\s+(\d+)$'; } | while read -r hdl; do
nft delete rule inet f2b-table f2b-chain $hdl; done
nft delete set inet f2b-table addr-set-nginx-forbidden
nft add set inet f2b-table addr-set-nginx-forbidden \{ type ipv4_addr\; flags interval\; \}
nft add rule inet f2b-table f2b-chain meta l4proto \{ tcp \} ip saddr @addr-set-nginx-forbidden reject
}
2026-02-05 16:56:28,935 fail2ban.utils [154]: ERROR 70102cd44a90 -- stderr: 'grep: unrecognized option: P'
2026-02-05 16:56:28,935 fail2ban.utils [154]: ERROR 70102cd44a90 -- stderr: 'Error: No such file or directory'
2026-02-05 16:56:28,935 fail2ban.utils [154]: ERROR 70102cd44a90 -- stderr: 'list chain inet f2b-table f2b-chain'
2026-02-05 16:56:28,935 fail2ban.utils [154]: ERROR 70102cd44a90 -- stderr: ' ^^^^^^^^^'
2026-02-05 16:56:28,935 fail2ban.utils [154]: ERROR 70102cd44a90 -- stderr: 'BusyBox v1.37.0 (2025-11-23 13:10:04 UTC) multi-call binary.'
2026-02-05 16:56:28,935 fail2ban.utils [154]: ERROR 70102cd44a90 -- stderr: ''
2026-02-05 16:56:28,935 fail2ban.utils [154]: ERROR 70102cd44a90 -- stderr: 'Usage: grep [-HhnlLoqvsrRiwFE] [-m N] [-A|B|C N] { PATTERN | -e PATTERN... | -f FILE... } [FILE]...'
2026-02-05 16:56:28,935 fail2ban.utils [154]: ERROR 70102cd44a90 -- stderr: ''
2026-02-05 16:56:28,935 fail2ban.utils [154]: ERROR 70102cd44a90 -- stderr: 'Search for PATTERN in FILEs (or stdin)'
2026-02-05 16:56:28,935 fail2ban.utils [154]: ERROR 70102cd44a90 -- stderr: ''
2026-02-05 16:56:28,935 fail2ban.utils [154]: ERROR 70102cd44a90 -- stderr: "\t-H\tAdd 'filename:' prefix"
2026-02-05 16:56:28,935 fail2ban.utils [154]: ERROR 70102cd44a90 -- stderr: "\t-h\tDo not add 'filename:' prefix"
2026-02-05 16:56:28,936 fail2ban.utils [154]: ERROR 70102cd44a90 -- stderr: "\t-n\tAdd 'line_no:' prefix"
2026-02-05 16:56:28,936 fail2ban.utils [154]: ERROR 70102cd44a90 -- stderr: '\t-l\tShow only names of files that match'
2026-02-05 16:56:28,936 fail2ban.utils [154]: ERROR 70102cd44a90 -- stderr: "\t-L\tShow only names of files that don't match"
2026-02-05 16:56:28,936 fail2ban.utils [154]: ERROR 70102cd44a90 -- stderr: '\t-c\tShow only count of matching lines'
2026-02-05 16:56:28,936 fail2ban.utils [154]: ERROR 70102cd44a90 -- stderr: '\t-o\tShow only the matching part of line'
2026-02-05 16:56:28,936 fail2ban.utils [154]: ERROR 70102cd44a90 -- stderr: '\t-q\tQuiet. Return 0 if PATTERN is found, 1 otherwise'
2026-02-05 16:56:28,936 fail2ban.utils [154]: ERROR 70102cd44a90 -- stderr: '\t-v\tSelect non-matching lines'
2026-02-05 16:56:28,936 fail2ban.utils [154]: ERROR 70102cd44a90 -- stderr: '\t-s\tSuppress open and read errors'
2026-02-05 16:56:28,936 fail2ban.utils [154]: ERROR 70102cd44a90 -- stderr: '\t-r\tRecurse'
2026-02-05 16:56:28,936 fail2ban.utils [154]: ERROR 70102cd44a90 -- stderr: '\t-R\tRecurse and dereference symlinks'
2026-02-05 16:56:28,936 fail2ban.utils [154]: ERROR 70102cd44a90 -- stderr: '\t-i\tIgnore case'
2026-02-05 16:56:28,936 fail2ban.utils [154]: ERROR 70102cd44a90 -- stderr: '\t-w\tMatch whole words only'
2026-02-05 16:56:28,936 fail2ban.utils [154]: ERROR 70102cd44a90 -- stderr: '\t-x\tMatch whole lines only'
2026-02-05 16:56:28,936 fail2ban.utils [154]: ERROR 70102cd44a90 -- stderr: '\t-F\tPATTERN is a literal (not regexp)'
2026-02-05 16:56:28,936 fail2ban.utils [154]: ERROR 70102cd44a90 -- stderr: '\t-E\tPATTERN is an extended regexp'
2026-02-05 16:56:28,936 fail2ban.utils [154]: ERROR 70102cd44a90 -- stderr: '\t-m N\tMatch up to N times per file'
2026-02-05 16:56:28,936 fail2ban.utils [154]: ERROR 70102cd44a90 -- stderr: '\t-A N\tPrint N lines of trailing context'
2026-02-05 16:56:28,937 fail2ban.utils [154]: ERROR 70102cd44a90 -- stderr: '\t-B N\tPrint N lines of leading context'
2026-02-05 16:56:28,937 fail2ban.utils [154]: ERROR 70102cd44a90 -- stderr: "\t-C N\tSame as '-A N -B N'"
2026-02-05 16:56:28,937 fail2ban.utils [154]: ERROR 70102cd44a90 -- stderr: '\t-e PTRN\tPattern to match'
2026-02-05 16:56:28,937 fail2ban.utils [154]: ERROR 70102cd44a90 -- stderr: '\t-f FILE\tRead pattern from file'
2026-02-05 16:56:28,937 fail2ban.utils [154]: ERROR 70102cd44a90 -- stderr: 'Error: Could not process rule: No such file or directory'
2026-02-05 16:56:28,937 fail2ban.utils [154]: ERROR 70102cd44a90 -- stderr: 'delete set inet f2b-table addr-set-nginx-forbidden'
2026-02-05 16:56:28,937 fail2ban.utils [154]: ERROR 70102cd44a90 -- stderr: ' ^^^^^^^^^'
2026-02-05 16:56:28,937 fail2ban.utils [154]: ERROR 70102cd44a90 -- stderr: 'Error: No such file or directory'
2026-02-05 16:56:28,937 fail2ban.utils [154]: ERROR 70102cd44a90 -- stderr: 'add set inet f2b-table addr-set-nginx-forbidden { type ipv4_addr; flags interval; }'
2026-02-05 16:56:28,937 fail2ban.utils [154]: ERROR 70102cd44a90 -- stderr: ' ^^^^^^^^^'
2026-02-05 16:56:28,937 fail2ban.utils [154]: ERROR 70102cd44a90 -- stderr: 'Error: No such file or directory'
2026-02-05 16:56:28,937 fail2ban.utils [154]: ERROR 70102cd44a90 -- stderr: 'add rule inet f2b-table f2b-chain meta l4proto { tcp } ip saddr @addr-set-nginx-forbidden reject'
2026-02-05 16:56:28,937 fail2ban.utils [154]: ERROR 70102cd44a90 -- stderr: ' ^^^^^^^^^'
2026-02-05 16:56:28,937 fail2ban.utils [154]: ERROR 70102cd44a90 -- returned 1
2026-02-05 16:56:28,937 fail2ban.actions [154]: ERROR Failed to flush bans in jail 'nginx-forbidden' action 'nftables': Error flushing action Jail('nginx-forbidden')/nftables: 'Script error'
2026-02-05 16:56:28,938 fail2ban.actions [154]: INFO No flush occurred, do consistency check
2026-02-05 16:56:28,945 fail2ban.utils [154]: ERROR 70102d3969b0 -- exec: nft list chain inet f2b-table f2b-chain | grep -q '@addr-set-nginx-bad-request[ \t]'
2026-02-05 16:56:28,945 fail2ban.utils [154]: ERROR 70102d3969b0 -- stderr: 'Error: No such file or directory'
2026-02-05 16:56:28,945 fail2ban.utils [154]: ERROR 70102d3969b0 -- stderr: 'list chain inet f2b-table f2b-chain'
2026-02-05 16:56:28,945 fail2ban.utils [154]: ERROR 70102d3969b0 -- stderr: ' ^^^^^^^^^'
2026-02-05 16:56:28,946 fail2ban.utils [154]: ERROR 70102d3969b0 -- returned 1
2026-02-05 16:56:28,946 fail2ban.actions [154]: ERROR Invariant check failed. Flush is impossible.
2026-02-05 16:56:28,946 fail2ban.actions [154]: NOTICE [nginx-bad-request] Unban 157.245.77.56
2026-02-05 16:56:28,946 fail2ban.actions [154]: NOTICE [nginx-bad-request] Unban 162.142.125.115
2026-02-05 16:56:28,948 fail2ban.actions [154]: NOTICE [nginx-bad-request] Unban 172.239.103.166
2026-02-05 16:56:28,948 fail2ban.actions [154]: NOTICE [nginx-bad-request] Unban 175.107.211.3
2026-02-05 16:56:28,948 fail2ban.actions [154]: NOTICE [nginx-bad-request] Unban 93.174.93.12
2026-02-05 16:56:28,952 fail2ban.utils [154]: ERROR 70102d395330 -- exec: nft list chain inet f2b-table f2b-chain | grep -q '@addr-set-nginx-forbidden[ \t]'
2026-02-05 16:56:28,952 fail2ban.utils [154]: ERROR 70102d395330 -- stderr: 'Error: No such file or directory'
2026-02-05 16:56:28,952 fail2ban.utils [154]: ERROR 70102d395330 -- stderr: 'list chain inet f2b-table f2b-chain'
2026-02-05 16:56:28,952 fail2ban.utils [154]: ERROR 70102d395330 -- stderr: ' ^^^^^^^^^'
2026-02-05 16:56:28,953 fail2ban.utils [154]: ERROR 70102d395330 -- returned 1
2026-02-05 16:56:28,953 fail2ban.actions [154]: ERROR Invariant check failed. Flush is impossible.
2026-02-05 16:56:28,953 fail2ban.actions [154]: NOTICE [nginx-forbidden] Unban 195.178.110.54
2026-02-05 16:56:28,954 fail2ban.actions [154]: NOTICE [nginx-forbidden] Unban 34.55.119.126
2026-02-05 16:56:28,955 fail2ban.actions [154]: NOTICE [nginx-forbidden] Unban 45.139.104.26
2026-02-05 16:56:28,955 fail2ban.actions [154]: NOTICE [nginx-forbidden] Unban 45.148.10.238
2026-02-05 16:56:28,955 fail2ban.actions [154]: NOTICE [nginx-forbidden] Unban 61.8.141.185
2026-02-05 16:56:29,003 fail2ban.utils [154]: ERROR 70102dbbb550 -- exec: { nft -a list chain inet f2b-table f2b-chain | grep -oP '@addr-set-nginx-bad-request\s+.*\s+\Khandle\s+(\d+)$'; } | while read -r hdl; do
nft delete rule inet f2b-table f2b-chain $hdl; done
nft delete set inet f2b-table addr-set-nginx-bad-request
{ nft list table inet f2b-table | grep -qP '^\s+set\s+'; } || {
nft delete table inet f2b-table
}
2026-02-05 16:56:29,003 fail2ban.utils [154]: ERROR 70102dbbb550 -- stderr: 'grep: unrecognized option: P'
2026-02-05 16:56:29,003 fail2ban.utils [154]: ERROR 70102dbbb550 -- stderr: 'Error: No such file or directory'
2026-02-05 16:56:29,003 fail2ban.utils [154]: ERROR 70102dbbb550 -- stderr: 'list chain inet f2b-table f2b-chain'
2026-02-05 16:56:29,003 fail2ban.utils [154]: ERROR 70102dbbb550 -- stderr: ' ^^^^^^^^^'
2026-02-05 16:56:29,003 fail2ban.utils [154]: ERROR 70102dbbb550 -- stderr: 'BusyBox v1.37.0 (2025-11-23 13:10:04 UTC) multi-call binary.'
2026-02-05 16:56:29,003 fail2ban.utils [154]: ERROR 70102dbbb550 -- stderr: ''
2026-02-05 16:56:29,003 fail2ban.utils [154]: ERROR 70102dbbb550 -- stderr: 'Usage: grep [-HhnlLoqvsrRiwFE] [-m N] [-A|B|C N] { PATTERN | -e PATTERN... | -f FILE... } [FILE]...'
2026-02-05 16:56:29,003 fail2ban.utils [154]: ERROR 70102dbbb550 -- stderr: ''
2026-02-05 16:56:29,003 fail2ban.utils [154]: ERROR 70102dbbb550 -- stderr: 'Search for PATTERN in FILEs (or stdin)'
2026-02-05 16:56:29,003 fail2ban.utils [154]: ERROR 70102dbbb550 -- stderr: ''
2026-02-05 16:56:29,004 fail2ban.utils [154]: ERROR 70102dbbb550 -- stderr: "\t-H\tAdd 'filename:' prefix"
2026-02-05 16:56:29,004 fail2ban.utils [154]: ERROR 70102dbbb550 -- stderr: "\t-h\tDo not add 'filename:' prefix"
2026-02-05 16:56:29,004 fail2ban.utils [154]: ERROR 70102dbbb550 -- stderr: "\t-n\tAdd 'line_no:' prefix"
2026-02-05 16:56:29,004 fail2ban.utils [154]: ERROR 70102dbbb550 -- stderr: '\t-l\tShow only names of files that match'
2026-02-05 16:56:29,004 fail2ban.utils [154]: ERROR 70102dbbb550 -- stderr: "\t-L\tShow only names of files that don't match"
2026-02-05 16:56:29,004 fail2ban.utils [154]: ERROR 70102dbbb550 -- stderr: '\t-c\tShow only count of matching lines'
2026-02-05 16:56:29,004 fail2ban.utils [154]: ERROR 70102dbbb550 -- stderr: '\t-o\tShow only the matching part of line'
2026-02-05 16:56:29,004 fail2ban.utils [154]: ERROR 70102dbbb550 -- stderr: '\t-q\tQuiet. Return 0 if PATTERN is found, 1 otherwise'
2026-02-05 16:56:29,004 fail2ban.utils [154]: ERROR 70102dbbb550 -- stderr: '\t-v\tSelect non-matching lines'
2026-02-05 16:56:29,004 fail2ban.utils [154]: ERROR 70102dbbb550 -- stderr: '\t-s\tSuppress open and read errors'
2026-02-05 16:56:29,004 fail2ban.utils [154]: ERROR 70102dbbb550 -- stderr: '\t-r\tRecurse'
2026-02-05 16:56:29,004 fail2ban.utils [154]: ERROR 70102dbbb550 -- stderr: '\t-R\tRecurse and dereference symlinks'
2026-02-05 16:56:29,004 fail2ban.utils [154]: ERROR 70102dbbb550 -- stderr: '\t-i\tIgnore case'
2026-02-05 16:56:29,004 fail2ban.utils [154]: ERROR 70102dbbb550 -- stderr: '\t-w\tMatch whole words only'
2026-02-05 16:56:29,004 fail2ban.utils [154]: ERROR 70102dbbb550 -- stderr: '\t-x\tMatch whole lines only'
2026-02-05 16:56:29,004 fail2ban.utils [154]: ERROR 70102dbbb550 -- stderr: '\t-F\tPATTERN is a literal (not regexp)'
2026-02-05 16:56:29,004 fail2ban.utils [154]: ERROR 70102dbbb550 -- stderr: '\t-E\tPATTERN is an extended regexp'
2026-02-05 16:56:29,004 fail2ban.utils [154]: ERROR 70102dbbb550 -- stderr: '\t-m N\tMatch up to N times per file'
2026-02-05 16:56:29,004 fail2ban.utils [154]: ERROR 70102dbbb550 -- stderr: '\t-A N\tPrint N lines of trailing context'
2026-02-05 16:56:29,004 fail2ban.utils [154]: ERROR 70102dbbb550 -- stderr: '\t-B N\tPrint N lines of leading context'
2026-02-05 16:56:29,004 fail2ban.utils [154]: ERROR 70102dbbb550 -- stderr: "\t-C N\tSame as '-A N -B N'"
2026-02-05 16:56:29,004 fail2ban.utils [154]: ERROR 70102dbbb550 -- stderr: '\t-e PTRN\tPattern to match'
2026-02-05 16:56:29,004 fail2ban.utils [154]: ERROR 70102dbbb550 -- stderr: '\t-f FILE\tRead pattern from file'
2026-02-05 16:56:29,004 fail2ban.utils [154]: ERROR 70102dbbb550 -- stderr: 'Error: Could not process rule: No such file or directory'
2026-02-05 16:56:29,004 fail2ban.utils [154]: ERROR 70102dbbb550 -- stderr: 'delete set inet f2b-table addr-set-nginx-bad-request'
2026-02-05 16:56:29,004 fail2ban.utils [154]: ERROR 70102dbbb550 -- stderr: ' ^^^^^^^^^'
2026-02-05 16:56:29,004 fail2ban.utils [154]: ERROR 70102dbbb550 -- stderr: 'grep: unrecognized option: P'
2026-02-05 16:56:29,005 fail2ban.utils [154]: ERROR 70102dbbb550 -- stderr: 'Error: No such file or directory'
2026-02-05 16:56:29,005 fail2ban.utils [154]: ERROR 70102dbbb550 -- stderr: 'list table inet f2b-table'
2026-02-05 16:56:29,005 fail2ban.utils [154]: ERROR 70102dbbb550 -- stderr: ' ^^^^^^^^^'
2026-02-05 16:56:29,005 fail2ban.utils [154]: ERROR 70102dbbb550 -- stderr: 'BusyBox v1.37.0 (2025-11-23 13:10:04 UTC) multi-call binary.'
2026-02-05 16:56:29,005 fail2ban.utils [154]: ERROR 70102dbbb550 -- stderr: ''
2026-02-05 16:56:29,005 fail2ban.utils [154]: ERROR 70102dbbb550 -- stderr: 'Usage: grep [-HhnlLoqvsrRiwFE] [-m N] [-A|B|C N] { PATTERN | -e PATTERN... | -f FILE... } [FILE]...'
2026-02-05 16:56:29,005 fail2ban.utils [154]: ERROR 70102dbbb550 -- stderr: ''
2026-02-05 16:56:29,005 fail2ban.utils [154]: ERROR 70102dbbb550 -- stderr: 'Search for PATTERN in FILEs (or stdin)'
2026-02-05 16:56:29,005 fail2ban.utils [154]: ERROR 70102dbbb550 -- stderr: ''
2026-02-05 16:56:29,005 fail2ban.utils [154]: ERROR 70102dbbb550 -- stderr: "\t-H\tAdd 'filename:' prefix"
2026-02-05 16:56:29,005 fail2ban.utils [154]: ERROR 70102dbbb550 -- stderr: "\t-h\tDo not add 'filename:' prefix"
2026-02-05 16:56:29,005 fail2ban.utils [154]: ERROR 70102dbbb550 -- stderr: "\t-n\tAdd 'line_no:' prefix"
2026-02-05 16:56:29,005 fail2ban.utils [154]: ERROR 70102dbbb550 -- stderr: '\t-l\tShow only names of files that match'
2026-02-05 16:56:29,005 fail2ban.utils [154]: ERROR 70102dbbb550 -- stderr: "\t-L\tShow only names of files that don't match"
2026-02-05 16:56:29,005 fail2ban.utils [154]: ERROR 70102dbbb550 -- stderr: '\t-c\tShow only count of matching lines'
2026-02-05 16:56:29,005 fail2ban.utils [154]: ERROR 70102dbbb550 -- stderr: '\t-o\tShow only the matching part of line'
2026-02-05 16:56:29,005 fail2ban.utils [154]: ERROR 70102dbbb550 -- stderr: '\t-q\tQuiet. Return 0 if PATTERN is found, 1 otherwise'
2026-02-05 16:56:29,005 fail2ban.utils [154]: ERROR 70102dbbb550 -- stderr: '\t-v\tSelect non-matching lines'
2026-02-05 16:56:29,005 fail2ban.utils [154]: ERROR 70102dbbb550 -- stderr: '\t-s\tSuppress open and read errors'
2026-02-05 16:56:29,005 fail2ban.utils [154]: ERROR 70102dbbb550 -- stderr: '\t-r\tRecurse'
2026-02-05 16:56:29,005 fail2ban.utils [154]: ERROR 70102dbbb550 -- stderr: '\t-R\tRecurse and dereference symlinks'
2026-02-05 16:56:29,005 fail2ban.utils [154]: ERROR 70102dbbb550 -- stderr: '\t-i\tIgnore case'
2026-02-05 16:56:29,005 fail2ban.utils [154]: ERROR 70102dbbb550 -- stderr: '\t-w\tMatch whole words only'
2026-02-05 16:56:29,005 fail2ban.utils [154]: ERROR 70102dbbb550 -- stderr: '\t-x\tMatch whole lines only'
2026-02-05 16:56:29,005 fail2ban.utils [154]: ERROR 70102dbbb550 -- stderr: '\t-F\tPATTERN is a literal (not regexp)'
2026-02-05 16:56:29,005 fail2ban.utils [154]: ERROR 70102dbbb550 -- stderr: '\t-E\tPATTERN is an extended regexp'
2026-02-05 16:56:29,005 fail2ban.utils [154]: ERROR 70102dbbb550 -- stderr: '\t-m N\tMatch up to N times per file'
2026-02-05 16:56:29,005 fail2ban.utils [154]: ERROR 70102dbbb550 -- stderr: '\t-A N\tPrint N lines of trailing context'
2026-02-05 16:56:29,006 fail2ban.utils [154]: ERROR 70102dbbb550 -- stderr: '\t-B N\tPrint N lines of leading context'
2026-02-05 16:56:29,006 fail2ban.utils [154]: ERROR 70102dbbb550 -- stderr: "\t-C N\tSame as '-A N -B N'"
2026-02-05 16:56:29,006 fail2ban.utils [154]: ERROR 70102dbbb550 -- stderr: '\t-e PTRN\tPattern to match'
2026-02-05 16:56:29,006 fail2ban.utils [154]: ERROR 70102dbbb550 -- stderr: '\t-f FILE\tRead pattern from file'
2026-02-05 16:56:29,006 fail2ban.utils [154]: ERROR 70102dbbb550 -- stderr: 'Error: Could not process rule: No such file or directory'
2026-02-05 16:56:29,006 fail2ban.utils [154]: ERROR 70102dbbb550 -- stderr: 'delete table inet f2b-table'
2026-02-05 16:56:29,006 fail2ban.utils [154]: ERROR 70102dbbb550 -- stderr: ' ^^^^^^^^^'
2026-02-05 16:56:29,006 fail2ban.utils [154]: ERROR 70102dbbb550 -- returned 1
2026-02-05 16:56:29,006 fail2ban.actions [154]: ERROR Failed to stop jail 'nginx-bad-request' action 'nftables': Error stopping action Jail('nginx-bad-request')/nftables: 'Script error'
2026-02-05 16:56:29,056 fail2ban.utils [154]: ERROR 70102d330630 -- exec: { nft -a list chain inet f2b-table f2b-chain | grep -oP '@addr-set-nginx-forbidden\s+.*\s+\Khandle\s+(\d+)$'; } | while read -r hdl; do
nft delete rule inet f2b-table f2b-chain $hdl; done
nft delete set inet f2b-table addr-set-nginx-forbidden
{ nft list table inet f2b-table | grep -qP '^\s+set\s+'; } || {
nft delete table inet f2b-table
}
2026-02-05 16:56:29,056 fail2ban.utils [154]: ERROR 70102d330630 -- stderr: 'grep: unrecognized option: P'
2026-02-05 16:56:29,056 fail2ban.utils [154]: ERROR 70102d330630 -- stderr: 'Error: No such file or directory'
2026-02-05 16:56:29,056 fail2ban.utils [154]: ERROR 70102d330630 -- stderr: 'list chain inet f2b-table f2b-chain'
2026-02-05 16:56:29,056 fail2ban.utils [154]: ERROR 70102d330630 -- stderr: ' ^^^^^^^^^'
2026-02-05 16:56:29,056 fail2ban.utils [154]: ERROR 70102d330630 -- stderr: 'BusyBox v1.37.0 (2025-11-23 13:10:04 UTC) multi-call binary.'
2026-02-05 16:56:29,056 fail2ban.utils [154]: ERROR 70102d330630 -- stderr: ''
2026-02-05 16:56:29,056 fail2ban.utils [154]: ERROR 70102d330630 -- stderr: 'Usage: grep [-HhnlLoqvsrRiwFE] [-m N] [-A|B|C N] { PATTERN | -e PATTERN... | -f FILE... } [FILE]...'
2026-02-05 16:56:29,056 fail2ban.utils [154]: ERROR 70102d330630 -- stderr: ''
2026-02-05 16:56:29,057 fail2ban.utils [154]: ERROR 70102d330630 -- stderr: 'Search for PATTERN in FILEs (or stdin)'
2026-02-05 16:56:29,057 fail2ban.utils [154]: ERROR 70102d330630 -- stderr: ''
2026-02-05 16:56:29,057 fail2ban.utils [154]: ERROR 70102d330630 -- stderr: "\t-H\tAdd 'filename:' prefix"
2026-02-05 16:56:29,057 fail2ban.utils [154]: ERROR 70102d330630 -- stderr: "\t-h\tDo not add 'filename:' prefix"
2026-02-05 16:56:29,057 fail2ban.utils [154]: ERROR 70102d330630 -- stderr: "\t-n\tAdd 'line_no:' prefix"
2026-02-05 16:56:29,057 fail2ban.utils [154]: ERROR 70102d330630 -- stderr: '\t-l\tShow only names of files that match'
2026-02-05 16:56:29,057 fail2ban.utils [154]: ERROR 70102d330630 -- stderr: "\t-L\tShow only names of files that don't match"
2026-02-05 16:56:29,057 fail2ban.utils [154]: ERROR 70102d330630 -- stderr: '\t-c\tShow only count of matching lines'
2026-02-05 16:56:29,057 fail2ban.utils [154]: ERROR 70102d330630 -- stderr: '\t-o\tShow only the matching part of line'
2026-02-05 16:56:29,057 fail2ban.utils [154]: ERROR 70102d330630 -- stderr: '\t-q\tQuiet. Return 0 if PATTERN is found, 1 otherwise'
2026-02-05 16:56:29,057 fail2ban.utils [154]: ERROR 70102d330630 -- stderr: '\t-v\tSelect non-matching lines'
2026-02-05 16:56:29,057 fail2ban.utils [154]: ERROR 70102d330630 -- stderr: '\t-s\tSuppress open and read errors'
2026-02-05 16:56:29,057 fail2ban.utils [154]: ERROR 70102d330630 -- stderr: '\t-r\tRecurse'
2026-02-05 16:56:29,057 fail2ban.utils [154]: ERROR 70102d330630 -- stderr: '\t-R\tRecurse and dereference symlinks'
2026-02-05 16:56:29,057 fail2ban.utils [154]: ERROR 70102d330630 -- stderr: '\t-i\tIgnore case'
2026-02-05 16:56:29,057 fail2ban.utils [154]: ERROR 70102d330630 -- stderr: '\t-w\tMatch whole words only'
2026-02-05 16:56:29,057 fail2ban.utils [154]: ERROR 70102d330630 -- stderr: '\t-x\tMatch whole lines only'
2026-02-05 16:56:29,057 fail2ban.utils [154]: ERROR 70102d330630 -- stderr: '\t-F\tPATTERN is a literal (not regexp)'
2026-02-05 16:56:29,057 fail2ban.utils [154]: ERROR 70102d330630 -- stderr: '\t-E\tPATTERN is an extended regexp'
2026-02-05 16:56:29,057 fail2ban.utils [154]: ERROR 70102d330630 -- stderr: '\t-m N\tMatch up to N times per file'
2026-02-05 16:56:29,057 fail2ban.utils [154]: ERROR 70102d330630 -- stderr: '\t-A N\tPrint N lines of trailing context'
2026-02-05 16:56:29,057 fail2ban.utils [154]: ERROR 70102d330630 -- stderr: '\t-B N\tPrint N lines of leading context'
2026-02-05 16:56:29,057 fail2ban.utils [154]: ERROR 70102d330630 -- stderr: "\t-C N\tSame as '-A N -B N'"
2026-02-05 16:56:29,057 fail2ban.utils [154]: ERROR 70102d330630 -- stderr: '\t-e PTRN\tPattern to match'
2026-02-05 16:56:29,057 fail2ban.utils [154]: ERROR 70102d330630 -- stderr: '\t-f FILE\tRead pattern from file'
2026-02-05 16:56:29,058 fail2ban.utils [154]: ERROR 70102d330630 -- stderr: 'Error: Could not process rule: No such file or directory'
2026-02-05 16:56:29,058 fail2ban.utils [154]: ERROR 70102d330630 -- stderr: 'delete set inet f2b-table addr-set-nginx-forbidden'
2026-02-05 16:56:29,058 fail2ban.utils [154]: ERROR 70102d330630 -- stderr: ' ^^^^^^^^^'
2026-02-05 16:56:29,058 fail2ban.utils [154]: ERROR 70102d330630 -- stderr: 'grep: unrecognized option: P'
2026-02-05 16:56:29,058 fail2ban.utils [154]: ERROR 70102d330630 -- stderr: 'Error: No such file or directory'
2026-02-05 16:56:29,058 fail2ban.utils [154]: ERROR 70102d330630 -- stderr: 'list table inet f2b-table'
2026-02-05 16:56:29,058 fail2ban.utils [154]: ERROR 70102d330630 -- stderr: ' ^^^^^^^^^'
2026-02-05 16:56:29,058 fail2ban.utils [154]: ERROR 70102d330630 -- stderr: 'BusyBox v1.37.0 (2025-11-23 13:10:04 UTC) multi-call binary.'
2026-02-05 16:56:29,058 fail2ban.utils [154]: ERROR 70102d330630 -- stderr: ''
2026-02-05 16:56:29,058 fail2ban.utils [154]: ERROR 70102d330630 -- stderr: 'Usage: grep [-HhnlLoqvsrRiwFE] [-m N] [-A|B|C N] { PATTERN | -e PATTERN... | -f FILE... } [FILE]...'
2026-02-05 16:56:29,058 fail2ban.utils [154]: ERROR 70102d330630 -- stderr: ''
2026-02-05 16:56:29,058 fail2ban.utils [154]: ERROR 70102d330630 -- stderr: 'Search for PATTERN in FILEs (or stdin)'
2026-02-05 16:56:29,058 fail2ban.utils [154]: ERROR 70102d330630 -- stderr: ''
2026-02-05 16:56:29,058 fail2ban.utils [154]: ERROR 70102d330630 -- stderr: "\t-H\tAdd 'filename:' prefix"
2026-02-05 16:56:29,058 fail2ban.utils [154]: ERROR 70102d330630 -- stderr: "\t-h\tDo not add 'filename:' prefix"
2026-02-05 16:56:29,058 fail2ban.utils [154]: ERROR 70102d330630 -- stderr: "\t-n\tAdd 'line_no:' prefix"
2026-02-05 16:56:29,058 fail2ban.utils [154]: ERROR 70102d330630 -- stderr: '\t-l\tShow only names of files that match'
2026-02-05 16:56:29,058 fail2ban.utils [154]: ERROR 70102d330630 -- stderr: "\t-L\tShow only names of files that don't match"
2026-02-05 16:56:29,058 fail2ban.utils [154]: ERROR 70102d330630 -- stderr: '\t-c\tShow only count of matching lines'
2026-02-05 16:56:29,058 fail2ban.utils [154]: ERROR 70102d330630 -- stderr: '\t-o\tShow only the matching part of line'
2026-02-05 16:56:29,058 fail2ban.utils [154]: ERROR 70102d330630 -- stderr: '\t-q\tQuiet. Return 0 if PATTERN is found, 1 otherwise'
2026-02-05 16:56:29,058 fail2ban.utils [154]: ERROR 70102d330630 -- stderr: '\t-v\tSelect non-matching lines'
2026-02-05 16:56:29,058 fail2ban.utils [154]: ERROR 70102d330630 -- stderr: '\t-s\tSuppress open and read errors'
2026-02-05 16:56:29,058 fail2ban.utils [154]: ERROR 70102d330630 -- stderr: '\t-r\tRecurse'
2026-02-05 16:56:29,058 fail2ban.utils [154]: ERROR 70102d330630 -- stderr: '\t-R\tRecurse and dereference symlinks'
2026-02-05 16:56:29,058 fail2ban.utils [154]: ERROR 70102d330630 -- stderr: '\t-i\tIgnore case'
2026-02-05 16:56:29,059 fail2ban.utils [154]: ERROR 70102d330630 -- stderr: '\t-w\tMatch whole words only'
2026-02-05 16:56:29,059 fail2ban.utils [154]: ERROR 70102d330630 -- stderr: '\t-x\tMatch whole lines only'
2026-02-05 16:56:29,059 fail2ban.utils [154]: ERROR 70102d330630 -- stderr: '\t-F\tPATTERN is a literal (not regexp)'
2026-02-05 16:56:29,059 fail2ban.utils [154]: ERROR 70102d330630 -- stderr: '\t-E\tPATTERN is an extended regexp'
2026-02-05 16:56:29,059 fail2ban.utils [154]: ERROR 70102d330630 -- stderr: '\t-m N\tMatch up to N times per file'
2026-02-05 16:56:29,059 fail2ban.utils [154]: ERROR 70102d330630 -- stderr: '\t-A N\tPrint N lines of trailing context'
2026-02-05 16:56:29,059 fail2ban.utils [154]: ERROR 70102d330630 -- stderr: '\t-B N\tPrint N lines of leading context'
2026-02-05 16:56:29,059 fail2ban.utils [154]: ERROR 70102d330630 -- stderr: "\t-C N\tSame as '-A N -B N'"
2026-02-05 16:56:29,059 fail2ban.utils [154]: ERROR 70102d330630 -- stderr: '\t-e PTRN\tPattern to match'
2026-02-05 16:56:29,059 fail2ban.utils [154]: ERROR 70102d330630 -- stderr: '\t-f FILE\tRead pattern from file'
2026-02-05 16:56:29,059 fail2ban.utils [154]: ERROR 70102d330630 -- stderr: 'Error: Could not process rule: No such file or directory'
2026-02-05 16:56:29,059 fail2ban.utils [154]: ERROR 70102d330630 -- stderr: 'delete table inet f2b-table'
2026-02-05 16:56:29,059 fail2ban.utils [154]: ERROR 70102d330630 -- stderr: ' ^^^^^^^^^'
2026-02-05 16:56:29,059 fail2ban.utils [154]: ERROR 70102d330630 -- returned 1
2026-02-05 16:56:29,059 fail2ban.actions [154]: ERROR Failed to stop jail 'nginx-forbidden' action 'nftables': Error stopping action Jail('nginx-forbidden')/nftables: 'Script error'
2026-02-05 16:56:29,065 fail2ban.actions [154]: NOTICE [nginx-badbots] Flush ticket(s) with nftables
2026-02-05 16:56:29,066 fail2ban.jail [154]: INFO Jail 'nginx-418' stopped
2026-02-05 16:56:29,068 fail2ban.jail [154]: INFO Jail 'nginx-bad-request' stopped
2026-02-05 16:56:29,068 fail2ban.jail [154]: INFO Jail 'nginx-badbots' stopped
2026-02-05 16:56:29,068 fail2ban.jail [154]: INFO Jail 'nginx-forbidden' stopped
2026-02-05 16:56:29,069 fail2ban.database [154]: INFO Connection to database closed.
2026-02-05 16:56:29,069 fail2ban.server [154]: INFO Exiting Fail2ban