search for: f2b

...tOS 6 server with nonstandard iptables system without rule for ACCEPT ESTABLISHED connections. All tables and chains empty (flush by legacy custom script) so only filter/INPUT chain has rules (also fail2ban chain): Chain INPUT (policy ACCEPT) target prot opt source destination f2b-postfix tcp -- 0.0.0.0/0 0.0.0.0/0 ACCEPT all -- 192.168.0.0/16 0.0.0.0/0 ACCEPT all -- 127.0.0.0/8 0.0.0.0/0 ACCEPT tcp -- 0.0.0.0/0 0.0.0.0/0 tcp dpt:22 ACCEPT tcp -- 0.0.0.0/0 0.0.0.0/0 tcp dpt:25 ACC...

...entOS7 > is firewalld. They take different fail2ban packages. > > CentOS6 = fail2ban > CentOS7 = fail2ban-firewalld > > Are you sure you are running the correct fail2ban package for your > firewall? (I screwed this up myself before I noticed and fixed it...) I do have the f2b-firewalld package installed yes. Since it was an update - it only replaced same installed packages. A standard install of F2B on Centos7 do also include the f2b-systemd package - which would seem logical. However, after I started using the recidive filter - which IMHO is one of the most important...

...; If you believe that python2.7 should be allowed read access on the disable file by default. >> Then you should report this as a bug. >> You can generate a local policy module to allow this access. >> Do >> allow this access for now by executing: >> # ausearch -c 'f2b/server' --raw | audit2allow -M my-f2bserver >> # semodule -i my-f2bserver.pp >> Weirdly enough, when I follow this suggestion and then empty audit.log and restart my server, I still get the exact same error again. > > I reinstalled this server from scratch and took some notes...

...07 09:42:05,875 fail2ban.filter [16138]: INFO [dovecot] Found 77.40.61.224 - 2020-04-07 09:42:05 2020-04-07 09:42:06,408 fail2ban.actions [16138]: NOTICE [dovecot] Ban 77.40.61.224 2020-04-07 09:42:06,981 fail2ban.utils [16138]: ERROR 7ff736d6f930 -- exec: ipset create f2b-dovecot hash:ip timeout 3600000 firewall-cmd --direct --add-rule ipv4 filter INPUT 0 -p tcp -m multiport --dports 0:65535 -m set --match-set f2b-dovecot src -j REJECT --reject-with icmp-port-unreachable 2020-04-07 09:42:06,982 fail2ban.utils [16138]: ERROR 7ff736d6f930 -- stderr: "i...

> > > > /var/log/fail2ban.log is showing that it's working: > > I have seem similar odd behaviour with f2b with other filters. > Try to uninstall the package > fail2ban-systemd > and stop and start fail2ban again. > This might change its behavior to the better. > The fail2ban-systemd package configures fail2ban to use systemd journal for log input. The OP can see that it is detecting...

...catchall (100. confidence) suggests ***** If you believe that python2.7 should be allowed read access on the disable file by default. Then you should report this as a bug. You can generate a local policy module to allow this access. Do allow this access for now by executing: # ausearch -c 'f2b/server' --raw | audit2allow -M my-f2bserver # semodule -i my-f2bserver.pp Weirdly enough, when I follow this suggestion and then empty audit.log and restart my server, I still get the exact same error again. Which makes Fail2ban unusable with SELinux in enforcing mode in the current state....

On a CentOS 6.7 system that's been running fail2ban for a long time, we recently started seeing this: ct 28 19:00:59 <servername> fail2ban.action[17561]: ERROR iptables -w -D INPUT -p tcp --dport ssh -j f2b-SSH#012iptables -w -F f2b-SSH#012iptables -w -X f2b-SSH -- stderr: "iptables v1.4.7: option `-w' requires an argument\nTry `iptables -h' or 'iptables --help' for more information.\niptables v1.4.7: option `-w' requires an argument\nTry `iptables -h' or 'iptables --h...

...5,875 fail2ban.filter [16138]: INFO [dovecot] Found 77.40.61.224 - 2020-04-07 09:42:05 > 2020-04-07 09:42:06,408 fail2ban.actions [16138]: NOTICE [dovecot] Ban 77.40.61.224 > 2020-04-07 09:42:06,981 fail2ban.utils [16138]: ERROR 7ff736d6f930 -- exec: ipset create f2b-dovecot hash:ip timeout 3600000 > firewall-cmd --direct --add-rule ipv4 filter INPUT 0 -p tcp -m multiport --dports 0:65535 -m set --match-set f2b-dovecot src -j REJECT --reject-with icmp-port-unreachable > 2020-04-07 09:42:06,982 fail2ban.utils [16138]: ERROR 7ff736d6f930 -- stder...

...catchall (100. confidence) suggests ***** If you believe that python2.7 should be allowed read access on the disable file by default. Then you should report this as a bug. You can generate a local policy module to allow this access. Do allow this access for now by executing: # ausearch -c 'f2b/f.sshd' --raw | audit2allow -M my-f2bfsshd # semodule -i my-f2bfsshd.pp ... As far as I can tell - and please correct me if I'm wrong - if a package doesn't play well with SELinux in the default configuration, this should be considered as a bug. In that case, the appropriate reaction...

...r.my.domain systemd[1]: Starting firewalld - dynamic firewall daemon... Apr 09 09:25:28 server.my.domain systemd[1]: Started firewalld - dynamic firewall daemon. Apr 09 09:25:30 server.my.domain firewalld[8324]: ERROR: '/usr/sbin/iptables-restore -w -n' failed: iptables-restore v1.4.21: Set f2b-apache doesn't exist. Error occurred at line: 2... Apr 09 09:25:30 server.my.domain firewalld[8324]: ERROR: COMMAND_FAILED: Direct: '/usr/sbin/iptables-restore -w -n' failed: iptables-restore v1.4.21: Set f2b-apache doesn't exist....

...20-04-08/are-you-finally-thankful-for-your-it-person-now Made me smile... :-) Anyway, I digged into the fail2ban problem today and it looks like something changed regarding selinux and fail2ban. After several iterations with fail2ban restart, ausearch and audit2allow like this: ausearch -c 'f2b/server' --raw | audit2allow -M f2b-addon I came up with a SELinux module like that: module f2b-addon 1.0; require { type sysctl_net_t; type sysfs_t; type fail2ban_t; class file { getattr open read }; class dir search; } #============= fail2ban_t =====...

...ursday, October 29, 2015 7:51 AM To: CentOS Subject: [CentOS] Semi-OT: fail2ban issue On a CentOS 6.7 system that's been running fail2ban for a long time, we recently started seeing this: ct 28 19:00:59 <servername> fail2ban.action[17561]: ERROR iptables -w -D INPUT -p tcp --dport ssh -j f2b-SSH#012iptables -w -F f2b-SSH#012iptables -w -X f2b-SSH -- stderr: "iptables v1.4.7: option `-w' requires an argument\nTry `iptables -h' or 'iptables --help' for more information.\niptables v1.4.7: option `-w' requires an argument\nTry `iptables -h' or 'iptables --h...

...**** > > If you believe that python2.7 should be allowed read access on the disable file > by default. > Then you should report this as a bug. > You can generate a local policy module to allow this access. > Do > allow this access for now by executing: > # ausearch -c 'f2b/server' --raw | audit2allow -M my-f2bserver > # semodule -i my-f2bserver.pp > > Weirdly enough, when I follow this suggestion and then empty audit.log and > restart my server, I still get the exact same error again. I reinstalled this server from scratch and took some notes. This...

...7 should be allowed read access on the > disable file by default. > >> Then you should report this as a bug. > >> You can generate a local policy module to allow this access. > >> Do > >> allow this access for now by executing: > >> # ausearch -c 'f2b/server' --raw | audit2allow -M my-f2bserver > >> # semodule -i my-f2bserver.pp > >> Weirdly enough, when I follow this suggestion and then empty audit.log > and restart my server, I still get the exact same error again. > > > > I reinstalled this server from scr...

...iptables to the 1.8.2 version it has been completely unable to do that vital task due to problems within nftables / iptables. The example that I am facing right now is with active and large DoS attacks email spam attacks. When fail2ban attempts to add the firewall blocks, such as; iptables -w -I f2b-postfix-sasl 1 -s 80.82.70.189 \ -j REJECT --reject-with icmp-port-unreachable iptables produces an error: iptables v1.8.2 (nf_tables): RULE_INSERT failed (Invalid argument): rule in chain f2b-postfix-sasl the system log matching that iptables update attempt states: x_tables: ip_tables: R...

Is anyone using asterisk with fail2ban? I have it working except it takes way more break-in attempts than what is set in "maxretry" in jail.conf For example, I get an email saying: "The IP 199.204.45.19 has just been banned by Fail2Ban after 181 attempts against ASTERISK." when "maxretry = 5" in jail.conf Perhaps someone else is experiencing this or has resolved it,

On Fri, May 22, 2020 2:05 pm, Adi Pircalabu wrote: > On 22-05-2020 10:38, Voytek Eymont wrote: > > Hardly a Dovecot issue. Can you please post the output of this command? > /usr/bin/fail2ban-regex /var/log/dovecot.log > /etc/fail2ban/filter.d/dovecot.conf Adi, thanks, what I get is: # /usr/bin/fail2ban-regex /var/log/dovecot.log /etc/fail2ban/filter.d/dovecot.conf Running

Hi all... Recently a new Fail2Ban was available among some other updates for my Centos 7 system, and I just updated all. It seems that was a very BAD idea. Just noticed that Fail2Ban have generated a 6MB error log because of the update, and FirewallD a 1MB log of errors ! (not sure if any of those were really working after this) ok, I'll just run yum downgrade fail2ban I thought. Naa, no

...ETC2_RGBA1, t), + C4B(ETC2_RGBA8, NONE, C0, C1, C2, C3, UNORM, ETC2_RGBA, t), + C4B(ETC2_SRGBA8, NONE, C0, C1, C2, C3, UNORM, ETC2_RGBA, t), + F1B(ETC2_R11_UNORM, NONE, C0, xx, xx, xx, UNORM, ETC2_R11, t), + F1B(ETC2_R11_SNORM, NONE, C0, xx, xx, xx, SNORM, ETC2_R11, t), + F2B(ETC2_RG11_UNORM, NONE, C0, C1, xx, xx, UNORM, ETC2_RG11, t), + F2B(ETC2_RG11_SNORM, NONE, C0, C1, xx, xx, SNORM, ETC2_RG11, t), + + C4B(ASTC_4x4, NONE, C0, C1, C2, C3, UNORM, ASTC_2D_4X4, t), + C4B(ASTC_5x4, NONE, C0, C1, C2, C3, UNORM, ASTC_2D_5X4, t), + C4B(ASTC_5x5,...

...ttacker is able > to make over 100 attempts before fail2ban bans them. >> I've tried this using asterisk's /var/log/asterisk/messages and > /var/log/messages with same results. >> Perhaps someone else is experiencing this or has resolved it, thank you. >> > I have F2B set to ban after 1 attempt. ?The most I have seen in the > logs is 4-5 attemps before ban is applied. ?I am calling scripts that > apply the ban to a cisco access-list, so there is script/telnet/config > delay but it is very minimal and works very well. > > JR > > Speaking blin...