On Wednesday, September 4, 2013 9:48:12 AM UTC-7, dan (ddpbsd) wrote: > > On Wed, Sep 4, 2013 at 12:25 PM, <[email protected] <javascript:>> > wrote: > > On Wednesday, September 4, 2013 9:10:11 AM UTC-7, dan (ddpbsd) wrote: > >> > >> 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. > >> > > > > The agent is not being restarted when the new agent.conf is pushed out. > > > > Make sure 510010 is firing. > > You can modify the line that looks like: > merror("%s: WARN: Unknown message received. No action defined.", > > in src/client-agent/receiver.c to print tmp_msg as well. >
You were right the rule wasn't firing. I'm not 100% sure what was wrong but I think the rule was incorrectly put into local_rules.xml. Once the rule was properly firing Active Response restarted the agent as expect. Thanks for the help! > > >> > >> > 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] <javascript:>. > > 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. 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