Difference between revisions of "Fail2ban troubleshooting"

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(Created page with '==Problem: Fail2Ban does not start== Solution: mv /usr/share/fail2ban /usr/share/fail2ban_old cd /usr/src/fail2ban-0.8.4 python setup.py install service fail2ban restart')
 
Line 6: Line 6:
  python setup.py install
  python setup.py install
  service fail2ban restart
  service fail2ban restart
==Starting fail2ban in debug mode (real example how to troubleshoot)==
Problem - Fail2ban does not start:
[root@ns3127522 ~]# service fail2ban restart
Stopping fail2ban:                                        [FALLITO]
Starting fail2ban:                                        [FALLITO]
[root@ns3127522 ~]#
===Debuging===
1. Go to /usr/src/fail2ban-0.8.4
cd /usr/src/fail2ban-0.8.4
2. Launch Fail2Ban in debug mode:
./fail2ban-client -v -v -v start
3. You will see a similar output:
[root@ns312752 fail2ban-0.8.4]# ./fail2ban-client -v -v -v start
DEBUG  Reading /etc/fail2ban/fail2ban
DEBUG  Reading files: ['/etc/fail2ban/fail2ban.conf', '/etc/fail2ban/fail2ban.local']
INFO  Using socket file /var/run/fail2ban/fail2ban.sock
DEBUG  Reading /etc/fail2ban/fail2ban
DEBUG  Reading files: ['/etc/fail2ban/fail2ban.conf', '/etc/fail2ban/fail2ban.local']
DEBUG  Reading /etc/fail2ban/jail
DEBUG  Reading files: ['/etc/fail2ban/jail.conf', '/etc/fail2ban/jail.local']
DEBUG  Reading /etc/fail2ban/jail
DEBUG  Reading files: ['/etc/fail2ban/jail.conf', '/etc/fail2ban/jail.local']
WARNING 'action' not defined in 'php-url-fopen'. Using default value
DEBUG  Reading /etc/fail2ban/jail
DEBUG  Reading files: ['/etc/fail2ban/jail.conf', '/etc/fail2ban/jail.local']
DEBUG  Reading /etc/fail2ban/filter.d/asterisk_hgc_200
DEBUG  Reading files: ['/etc/fail2ban/filter.d/asterisk_hgc_200.conf', '/etc/fail2ban/filter.d/asterisk_hgc_200.local']
DEBUG  Reading /etc/fail2ban/action.d/iptables-allports
DEBUG  Reading files: ['/etc/fail2ban/action.d/iptables-allports.conf', '/etc/fail2ban/action.d/iptables-allports.local']
DEBUG  Reading /etc/fail2ban/action.d/sendmail-banned
DEBUG  Reading files: ['/etc/fail2ban/action.d/sendmail-banned.conf', '/etc/fail2ban/action.d/sendmail-banned.local']
DEBUG  Reading /etc/fail2ban/jail
DEBUG  Reading files: ['/etc/fail2ban/jail.conf', '/etc/fail2ban/jail.local']
DEBUG  Reading /etc/fail2ban/jail
DEBUG  Reading files: ['/etc/fail2ban/jail.conf', '/etc/fail2ban/jail.local']
WARNING 'action' not defined in 'lighttpd-fastcgi'. Using default value
DEBUG  Reading /etc/fail2ban/jail
DEBUG  Reading files: ['/etc/fail2ban/jail.conf', '/etc/fail2ban/jail.local']
DEBUG  Reading /etc/fail2ban/filter.d/asterisk_manager
'''ERROR  /etc/fail2ban/filter.d/asterisk_manager.conf and /etc/fail2ban/filter.d/asterisk_manager.local do not exist
ERROR  Unable to read the filter
ERROR  Errors in jail 'asterisk-manager'. Skipping...'''
4. This means that these files are missing. Let's try to update our svn tree in /usr/src/mor
[root@ns312752 ~]# svn update /usr/src/mor                                                                                                                                 
U    /usr/src/mor/test/files/fail2ban/jail.conf                                                                                                                           
'''A    /usr/src/mor/test/files/fail2ban/filter.d/asterisk_manager.conf      '''                                                                                                 
U    /usr/src/mor/db/12/permissions.sql                                                                                                                                   
U    /usr/src/mor/db/x4/permissions.sql                                                                                                                                   
U    /usr/src/mor/scripts/mor_alerts.h                                                                                                                                     
U    /usr/src/mor/upgrade/12/stable_revision                                                                                                                               
U    /usr/src/mor/upgrade/x4/stable_revision
we see that this file was missing previously. Probably Fail2Ban patches script from Kolmisoft will be enough to fix this:
/usr/src/mor/test/scripts/various/fail2ban_patches.sh
5. We see that this solved the problem:
[root@ns312752 ~]# /usr/src/mor/test/scripts/various/fail2ban_patches.sh
[SOME OUTPUT SKIPPED HERE
Stopping fail2ban:                                        [FALLITO]
Starting fail2ban:                                        [FALLITO]
FAILED        Fail2Ban-SSH
Stopping fail2ban:                                        [FALLITO]
'''Starting fail2ban:                                        [  OK  ]'''
[root@ns3127522 ~]#

Revision as of 06:41, 14 August 2013

Problem: Fail2Ban does not start

Solution:

mv /usr/share/fail2ban /usr/share/fail2ban_old
cd /usr/src/fail2ban-0.8.4
python setup.py install
service fail2ban restart


Starting fail2ban in debug mode (real example how to troubleshoot)

Problem - Fail2ban does not start:

[root@ns3127522 ~]# service fail2ban restart
Stopping fail2ban:                                         [FALLITO] 
Starting fail2ban:                                         [FALLITO]
[root@ns3127522 ~]# 

Debuging

1. Go to /usr/src/fail2ban-0.8.4

cd /usr/src/fail2ban-0.8.4

2. Launch Fail2Ban in debug mode:

./fail2ban-client -v -v -v start

3. You will see a similar output:

[root@ns312752 fail2ban-0.8.4]# ./fail2ban-client -v -v -v start DEBUG Reading /etc/fail2ban/fail2ban DEBUG Reading files: ['/etc/fail2ban/fail2ban.conf', '/etc/fail2ban/fail2ban.local'] INFO Using socket file /var/run/fail2ban/fail2ban.sock DEBUG Reading /etc/fail2ban/fail2ban DEBUG Reading files: ['/etc/fail2ban/fail2ban.conf', '/etc/fail2ban/fail2ban.local'] DEBUG Reading /etc/fail2ban/jail DEBUG Reading files: ['/etc/fail2ban/jail.conf', '/etc/fail2ban/jail.local'] DEBUG Reading /etc/fail2ban/jail DEBUG Reading files: ['/etc/fail2ban/jail.conf', '/etc/fail2ban/jail.local'] WARNING 'action' not defined in 'php-url-fopen'. Using default value DEBUG Reading /etc/fail2ban/jail DEBUG Reading files: ['/etc/fail2ban/jail.conf', '/etc/fail2ban/jail.local'] DEBUG Reading /etc/fail2ban/filter.d/asterisk_hgc_200 DEBUG Reading files: ['/etc/fail2ban/filter.d/asterisk_hgc_200.conf', '/etc/fail2ban/filter.d/asterisk_hgc_200.local'] DEBUG Reading /etc/fail2ban/action.d/iptables-allports DEBUG Reading files: ['/etc/fail2ban/action.d/iptables-allports.conf', '/etc/fail2ban/action.d/iptables-allports.local'] DEBUG Reading /etc/fail2ban/action.d/sendmail-banned DEBUG Reading files: ['/etc/fail2ban/action.d/sendmail-banned.conf', '/etc/fail2ban/action.d/sendmail-banned.local'] DEBUG Reading /etc/fail2ban/jail DEBUG Reading files: ['/etc/fail2ban/jail.conf', '/etc/fail2ban/jail.local'] DEBUG Reading /etc/fail2ban/jail DEBUG Reading files: ['/etc/fail2ban/jail.conf', '/etc/fail2ban/jail.local'] WARNING 'action' not defined in 'lighttpd-fastcgi'. Using default value DEBUG Reading /etc/fail2ban/jail DEBUG Reading files: ['/etc/fail2ban/jail.conf', '/etc/fail2ban/jail.local'] DEBUG Reading /etc/fail2ban/filter.d/asterisk_manager ERROR /etc/fail2ban/filter.d/asterisk_manager.conf and /etc/fail2ban/filter.d/asterisk_manager.local do not exist ERROR Unable to read the filter ERROR Errors in jail 'asterisk-manager'. Skipping...

4. This means that these files are missing. Let's try to update our svn tree in /usr/src/mor

[root@ns312752 ~]# svn update /usr/src/mor U /usr/src/mor/test/files/fail2ban/jail.conf A /usr/src/mor/test/files/fail2ban/filter.d/asterisk_manager.conf U /usr/src/mor/db/12/permissions.sql U /usr/src/mor/db/x4/permissions.sql U /usr/src/mor/scripts/mor_alerts.h U /usr/src/mor/upgrade/12/stable_revision U /usr/src/mor/upgrade/x4/stable_revision

we see that this file was missing previously. Probably Fail2Ban patches script from Kolmisoft will be enough to fix this:

/usr/src/mor/test/scripts/various/fail2ban_patches.sh 

5. We see that this solved the problem:

[root@ns312752 ~]# /usr/src/mor/test/scripts/various/fail2ban_patches.sh

[SOME OUTPUT SKIPPED HERE

Stopping fail2ban: [FALLITO] Starting fail2ban: [FALLITO]

FAILED         Fail2Ban-SSH

Stopping fail2ban: [FALLITO] Starting fail2ban: [ OK ] [root@ns3127522 ~]#