FM / action.d

/etc/fail2ban/action.d

Name	Size	Mode	Actions
abuseipdb.conf	3748	0644	edit dl rm
apf.conf	587	0644	edit dl rm
badips.conf	629	0644	edit dl rm
badips.py	11536	0644	edit dl rm
blocklist_de.conf	2715	0644	edit dl rm
bsd-ipfw.conf	3226	0644	edit dl rm
cloudflare.conf	2970	0644	edit dl rm
complain.conf	4757	0644	edit dl rm
dshield.conf	7668	0644	edit dl rm
dummy.conf	1717	0644	edit dl rm
firewallcmd-allports.conf	1501	0644	edit dl rm
firewallcmd-common.conf	2649	0644	edit dl rm
firewallcmd-ipset.conf	2719	0644	edit dl rm
firewallcmd-multiport.conf	1322	0644	edit dl rm
firewallcmd-new.conf	1950	0644	edit dl rm
firewallcmd-rich-logging.conf	1021	0644	edit dl rm
firewallcmd-rich-rules.conf	1801	0644	edit dl rm
helpers-common.conf	592	0644	edit dl rm
hostsdeny.conf	1657	0644	edit dl rm
ipfilter.conf	1573	0644	edit dl rm
ipfw.conf	1505	0644	edit dl rm
iptables-allports.conf	1514	0644	edit dl rm
iptables-common.conf	2738	0644	edit dl rm
iptables-ipset-proto4.conf	2088	0644	edit dl rm
iptables-ipset-proto6-allports.conf	2742	0644	edit dl rm
iptables-ipset-proto6.conf	2785	0644	edit dl rm
iptables-multiport-log.conf	2170	0644	edit dl rm
iptables-multiport.conf	1508	0644	edit dl rm
iptables-new.conf	1585	0644	edit dl rm
iptables-xt_recent-echo.conf	2672	0644	edit dl rm
iptables.conf	1427	0644	edit dl rm
mail-buffered.conf	2431	0644	edit dl rm
mail-whois-common.conf	1051	0644	edit dl rm
mail-whois-lines.conf	2443	0644	edit dl rm
mail-whois.conf	1842	0644	edit dl rm
mail.conf	1709	0644	edit dl rm
mynetwatchman.conf	5321	0644	edit dl rm
netscaler.conf	1493	0644	edit dl rm
nftables-allports.conf	383	0644	edit dl rm
nftables-multiport.conf	384	0644	edit dl rm
nftables.conf	6318	0644	edit dl rm
nginx-block-map.conf	3746	0644	edit dl rm
npf.conf	1524	0644	edit dl rm
nsupdate.conf	3234	0644	edit dl rm
osx-afctl.conf	497	0644	edit dl rm
osx-ipfw.conf	2302	0644	edit dl rm
pf.conf	3750	0644	edit dl rm
route.conf	1023	0644	edit dl rm
sendmail-buffered.conf	2806	0644	edit dl rm
sendmail-common.conf	1938	0644	edit dl rm
sendmail-geoip-lines.conf	1761	0644	edit dl rm
sendmail-whois-ipjailmatches.conf	1055	0644	edit dl rm
sendmail-whois-ipmatches.conf	1036	0644	edit dl rm
sendmail-whois-lines.conf	1299	0644	edit dl rm
sendmail-whois-matches.conf	1000	0644	edit dl rm
sendmail-whois.conf	950	0644	edit dl rm
sendmail.conf	829	0644	edit dl rm
shorewall-ipset-proto6.conf	3521	0644	edit dl rm
shorewall.conf	2156	0644	edit dl rm
smtp.py	6277	0644	edit dl rm
symbiosis-blacklist-allports.conf	1418	0644	edit dl rm
ufw.conf	1045	0644	edit dl rm
xarf-login-attack.conf	6443	0644	edit dl rm

Edit: /etc/fail2ban/action.d/nginx-block-map.conf (3746B)

# Fail2Ban configuration file for black-listing via nginx
#
# Author: Serg G. Brester (aka sebres)
#
# To use 'nginx-block-map' action you should define some special blocks in your nginx configuration,
# and use it hereafter in your locations (to notify fail2ban by failure, resp. nginx by ban).
#
# Example (argument "token_id" resp. cookie "session_id" used here as unique identifier for user):
#
#   http {
#     ...
#     # maps to check user is blacklisted (banned in f2b):
#     #map $arg_token_id      $blck_lst_tok { include blacklisted-tokens.map; }
#     map  $cookie_session_id $blck_lst_ses { include blacklisted-sessions.map; }
#     ...
#     # special log-format to notify fail2ban about failures:
#     log_format f2b_session_errors '$msec failure "$cookie_session_id" - $remote_addr - $remote_user '
#      ;#                  '"$request" $status $bytes_sent '
#       #                  '"$http_referer" "$http_user_agent"';
#
#     # location checking blacklisted values:
#     location ... {
#       # check banned sessionid:
#       if ($blck_lst_ses != "") {
#         try_files "" @f2b-banned;
#       }
#       ...
#       # notify fail2ban about a failure inside nginx:
#       error_page 401 = @notify-f2b;
#       ...
#     }
#     ...
#     # location for return with "403 Forbidden" if banned:
#     location @f2b-banned {
#       default_type text/html;
#       return 403 "<br/><center>
#         <b style=\"color:red; font-size:18pt; border:2pt solid black; padding:5pt;\">
#         You are banned!</b></center>";
#     }
#     ...
#     # location to notify fail2ban about a failure inside nginx:
#     location @notify-f2b {
#       access_log /var/log/nginx/f2b-auth-errors.log f2b_session_errors;
#     }
#   }
#   ...
#
# Note that quote-character (and possibly other special characters) are not allowed currently as session-id.
# Thus please add any session-id validation rule in your locations (or in the corresponding backend-service), 
# like in example below:
#
#   location ... {
#     if ($cookie_session_id !~ "^[\w\-]+$") {
#       return  403 "Wrong session-id"
#     }
#     ...
#   }
#
# The parameters for jail corresponding log-format (f2b_session_errors):
#
#   [nginx-blck-lst]
#   filter =
#   datepattern = ^Epoch
#   failregex = ^ failure "<F-ID>[^"]+</F-ID>" - <ADDR>
#   usedns = no
#
# The same log-file can be used for IP-related jail (additionally to session-related, to ban very bad IPs):
#
#   [nginx-blck-ip]
#   maxretry = 100
#   filter =
#   datepattern = ^Epoch
#   failregex = ^ failure "[^"]+" - <ADDR>
#   usedns = no
#

[Definition]

# path to configuration of nginx (used to target nginx-instance in multi-instance system,
# and as path for the blacklisted map):
srv_cfg_path = /etc/nginx/

# cmd-line arguments to supply to test/reload nginx:
#srv_cmd = nginx -c %(srv_cfg_path)s/nginx.conf
srv_cmd = nginx

# first test configuration is correct, hereafter send reload signal:
blck_lst_reload = %(srv_cmd)s -qt; if [ $? -eq 0 ]; then
                    %(srv_cmd)s -s reload; if [ $? -ne 0 ]; then echo 'reload failed.'; fi;
                  fi;

# map-file for nginx, can be redefined using `action = nginx-block-map[blck_lst_file="/path/file.map"]`:
blck_lst_file = %(srv_cfg_path)s/blacklisted-sessions.map

# Action definition:

actionstart_on_demand = false
actionstart = touch '%(blck_lst_file)s'

actionflush = truncate -s 0 '%(blck_lst_file)s'; %(blck_lst_reload)s

actionstop = %(actionflush)s

actioncheck =

_echo_blck_row = printf '\%%s 1;\n' "<fid>"

actionban = %(_echo_blck_row)s >> '%(blck_lst_file)s'; %(blck_lst_reload)s

actionunban = id=$(%(_echo_blck_row)s | sed -e 's/[]\/$*.^|[]/\\&/g'); sed -i "/^$id$/d" %(blck_lst_file)s; %(blck_lst_reload)s

cmd: