On Wed, Sep 4, 2013 at 12:00 PM, <[email protected]> wrote: > > > On Wednesday, September 4, 2013 6:49:26 AM UTC-7, dan (ddpbsd) wrote: >> >> On Tue, Sep 3, 2013 at 11:37 PM, <[email protected]> wrote: >> > I'm running OSSEC 2.7 on CentOS 6.4 (Both Manager and Agent) I'm trying >> > to >> > get a centralized agent configuration going. >> > >> > I've set both the Manager and Agent to run at debug level 2. I have >> > verified >> > that the firewall is disabled on both hosts and they are on the same >> > subnet. >> > >> > I'm attempting to make any modifications to agent.conf on the manager >> > restart the ossec agent on the remote system. >> > >> > When I make a modification to the /var/ossec/etc/shared/agent.conf file >> > and >> > watch the ossec.log on the manager I see the message: >> > >> > ossec-remoted: DEBUG Sending file 'merged.mg' to agent. >> > >> > As soon as the manager sends merged.mg to the Agent I see numerous lines >> > like the following: >> > >> > ossec-agentd: WARN: Unknown message received. No action defined. >> > >> >> Try stopping the ossec processes on the server, moving merged.mg to >> another directory, and starting the processes back up. If I'm >> understanding the code correctly (and there is a good possibility I am >> not right now), there is something in the merged.mg that isn't liked. >> Perhaps make sure there are not odd files in the shared directory. >> > I stopped the ossec processes the manager (/var/ossec/bin/ossec-control > stop) and rm'd the merged.mg in /var/ossec/etc/shared/. After restarting the > the manager I see the same symptoms. > > On the Manager: > 2013/09/04 08:51:11 ossec-remoted: DEBUG Sending file 'merged.mg' to agent. > > On the Agent: > 2013/09/04 08:51:11 ossec-agentd: WARN: Unknown message received. No action > defined. >
Is something not working correctly? If everything seems to be working you could ignore the warning. You could also add some debug messages to the code to help debug the issue. > I don't see any strange items in /var/ossec/etc/shared: > [root@ossec_server shared]# ls -la > total 176 > drwxrwx---. 2 root ossec 4096 Sep 4 08:56 . > dr-xr-x---. 3 root ossec 4096 Sep 3 20:26 .. > -rw-r--r--. 1 root ossec 354 Sep 4 08:47 agent.conf > -r--r-----. 1 root ossec 115 Sep 4 08:47 ar.conf > -r--r-----. 1 root ossec 9501 Nov 8 2012 cis_debian_linux_rcl.txt > -r--r-----. 1 root ossec 8192 Nov 8 2012 cis_rhel5_linux_rcl.txt > -r--r-----. 1 root ossec 14251 Nov 8 2012 cis_rhel_linux_rcl.txt > -rw-r--r--. 1 ossecr ossec 70684 Sep 4 08:47 merged.mg > -r--r-----. 1 root ossec 14872 Nov 8 2012 rootkit_files.txt > -r--r-----. 1 root ossec 5193 Nov 8 2012 rootkit_trojans.txt > -r--r-----. 1 root ossec 4457 Nov 8 2012 system_audit_rcl.txt > -r--r-----. 1 root ossec 4682 Nov 8 2012 win_applications_rcl.txt > -r--r-----. 1 root ossec 3859 Nov 8 2012 win_audit_rcl.txt > -r--r-----. 1 root ossec 4929 Nov 8 2012 win_malware_rcl.txt > > I've attached my merged.mg file. > >> > I assume I have something improperly configured on the agent. >> > >> > Here are the contents of agent.conf and ossec.conf on the Agent: >> > >> > agent.conf: >> > <agent_config> >> > <syscheck> >> > <frequency>3600</frequency> >> >> I don't believe these 2 items do anything on agents. > > > Just to be clear your suggesting that auto_ignore and alert_new_files don't > belong on agents? Seems to make sense since all the agent does is report the > changes, I'll update the agent.conf. > >> >> > <auto_ignore>no</auto_ignore> >> > <alert_new_files>yes</alert_new_files> >> >> >> > <scan_on_start>no</scan_on_start> >> > <directories report_changes="yes" >> > >> > check_all="yes">/etc,/usr/bin,/usr/sbin,/opt/ossec/etc/shared</directories> >> > </syscheck> >> > >> > </agent_config> >> > >> > ossec.conf >> > <ossec_config> >> > <client> >> > <server-ip>192.168.140.138</server-ip> >> > </client> >> > >> > </ossec_config> >> > >> > >> > Here is the ossec.conf on the Manager: >> > >> > <ossec_config> >> > <global> >> > <email_notification>no</email_notification> >> > </global> >> > >> > <rules> >> > <include>rules_config.xml</include> >> > <include>pam_rules.xml</include> >> > <include>sshd_rules.xml</include> >> > <include>telnetd_rules.xml</include> >> > <include>syslog_rules.xml</include> >> > <include>arpwatch_rules.xml</include> >> > <include>symantec-av_rules.xml</include> >> > <include>symantec-ws_rules.xml</include> >> > <include>pix_rules.xml</include> >> > <include>named_rules.xml</include> >> > <include>smbd_rules.xml</include> >> > <include>vsftpd_rules.xml</include> >> > <include>pure-ftpd_rules.xml</include> >> > <include>proftpd_rules.xml</include> >> > <include>ms_ftpd_rules.xml</include> >> > <include>ftpd_rules.xml</include> >> > <include>hordeimp_rules.xml</include> >> > <include>roundcube_rules.xml</include> >> > <include>wordpress_rules.xml</include> >> > <include>cimserver_rules.xml</include> >> > <include>vpopmail_rules.xml</include> >> > <include>vmpop3d_rules.xml</include> >> > <include>courier_rules.xml</include> >> > <include>web_rules.xml</include> >> > <include>web_appsec_rules.xml</include> >> > <include>apache_rules.xml</include> >> > <include>nginx_rules.xml</include> >> > <include>php_rules.xml</include> >> > <include>mysql_rules.xml</include> >> > <include>postgresql_rules.xml</include> >> > <include>ids_rules.xml</include> >> > <include>squid_rules.xml</include> >> > <include>firewall_rules.xml</include> >> > <include>cisco-ios_rules.xml</include> >> > <include>netscreenfw_rules.xml</include> >> > <include>sonicwall_rules.xml</include> >> > <include>postfix_rules.xml</include> >> > <include>sendmail_rules.xml</include> >> > <include>imapd_rules.xml</include> >> > <include>mailscanner_rules.xml</include> >> > <include>dovecot_rules.xml</include> >> > <include>ms-exchange_rules.xml</include> >> > <include>racoon_rules.xml</include> >> > <include>vpn_concentrator_rules.xml</include> >> > <include>spamd_rules.xml</include> >> > <include>msauth_rules.xml</include> >> > <include>mcafee_av_rules.xml</include> >> > <include>trend-osce_rules.xml</include> >> > <include>ms-se_rules.xml</include> >> > <!-- <include>policy_rules.xml</include> --> >> > <include>zeus_rules.xml</include> >> > <include>solaris_bsm_rules.xml</include> >> > <include>vmware_rules.xml</include> >> > <include>ms_dhcp_rules.xml</include> >> > <include>asterisk_rules.xml</include> >> > <include>ossec_rules.xml</include> >> > <include>attack_rules.xml</include> >> > <include>openbsd_rules.xml</include> >> > <include>clam_av_rules.xml</include> >> > <include>bro-ids_rules.xml</include> >> > <include>dropbear_rules.xml</include> >> > <include>local_rules.xml</include> >> > </rules> >> > >> > <syscheck> >> > <frequency>79200</frequency> >> > >> > <directories check_all="yes">/etc,/usr/bin,/usr/sbin</directories> >> > <directories check_all="yes">/bin,/sbin</directories> >> > >> > <ignore>/etc/mtab</ignore> >> > <ignore>/etc/mnttab</ignore> >> > <ignore>/etc/hosts.deny</ignore> >> > <ignore>/etc/mail/statistics</ignore> >> > <ignore>/etc/random-seed</ignore> >> > <ignore>/etc/adjtime</ignore> >> > <ignore>/etc/httpd/logs</ignore> >> > <ignore>/etc/utmpx</ignore> >> > <ignore>/etc/wtmpx</ignore> >> > <ignore>/etc/cups/certs</ignore> >> > <ignore>/etc/dumpdates</ignore> >> > <ignore>/etc/svc/volatile</ignore> >> > </syscheck> >> > >> > <rootcheck> >> > <disabled>yes</disabled> >> > >> > <rootkit_files>/var/ossec/etc/shared/rootkit_files.txt</rootkit_files> >> > >> > >> > <rootkit_trojans>/var/ossec/etc/shared/rootkit_trojans.txt</rootkit_trojans> >> > >> > <system_audit>/var/ossec/etc/shared/system_audit_rcl.txt</system_audit> >> > >> > >> > <system_audit>/var/ossec/etc/shared/cis_debian_linux_rcl.txt</system_audit> >> > >> > >> > <system_audit>/var/ossec/etc/shared/cis_rhel_linux_rcl.txt</system_audit> >> > >> > >> > <system_audit>/var/ossec/etc/shared/cis_rhel5_linux_rcl.txt</system_audit> >> > </rootcheck> >> > >> > <global> >> > <white_list>127.0.0.1</white_list> >> > <white_list>^localhost.localdomain$</white_list> >> > <white_list>192.168.140.2</white_list> >> > </global> >> > >> > <remote> >> > <connection>syslog</connection> >> > </remote> >> > >> > <remote> >> > <connection>secure</connection> >> > </remote> >> > >> > <alerts> >> > <log_alert_level>1</log_alert_level> >> > </alerts> >> > >> > <command> >> > <name>restart-ossec</name> >> > <executable>restart-ossec.sh</executable> >> > <expect></expect> >> > </command> >> > >> > <active-response> >> > <command>restart-ossec</command> >> > <location>local</location> >> > <rules_id>510010</rules_id> >> > </active-response> >> > >> > </ossec_config> >> > >> > I have the following rule defined in /var/ossec/rules/local_rules.xml: >> > >> > <rule id="510010" level="10"> >> > <if_sid>550</if_sid> >> > <match>/var/ossec/etc/shared/agent.conf</match> >> > <description>agent.conf has been modified.</description> >> > </rule> >> > >> > >> > Here are the permissions of /var/ossec/etc/shared on the Manager: >> > >> > [root@ossec_server shared]# ls -la >> > total 176 >> > drwxrwx---. 2 root ossec 4096 Sep 3 20:34 . >> > dr-xr-x---. 3 root ossec 4096 Sep 3 20:26 .. >> > -rw-r--r--. 1 root ossec 344 Sep 3 20:34 agent.conf >> > -r--r-----. 1 root ossec 115 Sep 3 20:34 ar.conf >> > -r--r-----. 1 root ossec 9501 Nov 8 2012 cis_debian_linux_rcl.txt >> > -r--r-----. 1 root ossec 8192 Nov 8 2012 cis_rhel5_linux_rcl.txt >> > -r--r-----. 1 root ossec 14251 Nov 8 2012 cis_rhel_linux_rcl.txt >> > -rw-r--r--. 1 ossecr ossec 70680 Sep 3 20:34 merged.mg >> > -r--r-----. 1 root ossec 14872 Nov 8 2012 rootkit_files.txt >> > -r--r-----. 1 root ossec 5193 Nov 8 2012 rootkit_trojans.txt >> > -r--r-----. 1 root ossec 4457 Nov 8 2012 system_audit_rcl.txt >> > -r--r-----. 1 root ossec 4682 Nov 8 2012 win_applications_rcl.txt >> > -r--r-----. 1 root ossec 3859 Nov 8 2012 win_audit_rcl.txt >> > -r--r-----. 1 root ossec 4929 Nov 8 2012 win_malware_rcl.txt >> > >> > Here they are on the Agent: >> > [root@CentOS1 shared]# ls -la >> > total 176 >> > drwxrwx---. 2 root ossec 4096 Sep 3 19:51 . >> > dr-xr-x---. 3 root ossec 4096 Sep 3 20:03 .. >> > -rw-r--r--. 1 ossec ossec 344 Sep 3 20:21 agent.conf >> > -rw-r--r--. 1 ossec ossec 115 Sep 3 20:21 ar.conf >> > -rwxrwx---. 1 root ossec 9501 Sep 3 20:21 cis_debian_linux_rcl.txt >> > -rwxrwx---. 1 root ossec 8192 Sep 3 20:21 cis_rhel5_linux_rcl.txt >> > -rwxrwx---. 1 root ossec 14251 Sep 3 20:21 cis_rhel_linux_rcl.txt >> > -rw-r--r--. 1 ossec ossec 70674 Sep 3 20:21 merged.mg >> > -rwxrwx---. 1 root ossec 14872 Sep 3 20:21 rootkit_files.txt >> > -rwxrwx---. 1 root ossec 5193 Sep 3 20:21 rootkit_trojans.txt >> > -rwxrwx---. 1 root ossec 4457 Sep 3 20:21 system_audit_rcl.txt >> > -rwxrwx---. 1 root ossec 4682 Sep 3 20:21 win_applications_rcl.txt >> > -rwxrwx---. 1 root ossec 3859 Sep 3 20:21 win_audit_rcl.txt >> > -rwxrwx---. 1 root ossec 4929 Sep 3 20:21 win_malware_rcl.txt >> > >> > >> > The remote agent responds to /var/ossec/bin/agent-control -R 1024 right >> > away >> > and without issue because of this I assume Active Response is working in >> > some fashion. >> > >> > Please let me know if you have any idea what is causing the "Unknown >> > message >> > received. No action defined." message or why the remote agents are not >> > restarting when receiving a new agent.conf. >> > >> > Thanks, >> > -AMM >> > >> > -- >> > >> > --- >> > You received this message because you are subscribed to the Google >> > Groups >> > "ossec-list" group. >> > To unsubscribe from this group and stop receiving emails from it, send >> > an >> > email to [email protected]. >> > For more options, visit https://groups.google.com/groups/opt_out. > > -- > > --- > You received this message because you are subscribed to the Google Groups > "ossec-list" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to [email protected]. > For more options, visit https://groups.google.com/groups/opt_out. -- --- You received this message because you are subscribed to the Google Groups "ossec-list" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. 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