Error: OID not increasing when parsing SNMP output of Checkpoint VSX

Written by - 0 comments

Published on - Listed in Linux Security Monitoring


While debugging the status of VPN tunnels configured in a Checkpoint VSX firewall, the SNMP output was cut short:

nagios@monitoring:~$ snmpwalk -v 3 -l authNoPriv -u nagios -a sha1 -A secret -x DES -X secret -n vsid3 checkpointfw 1.3.6.1.4.1.2620.500.9003
iso.3.6.1.4.1.2620.500.9003.1.2.3.120.166.19.0 = STRING: "Gateway_AWS_Remote_Online_2"
iso.3.6.1.4.1.2620.500.9003.1.2.3.68.31.71.0 = STRING: "Gateway_AWS_Remote_Online_1"
Error: OID not increasing: iso.3.6.1.4.1.2620.500.9003.1.2.3.120.166.19.0
 >= iso.3.6.1.4.1.2620.500.9003.1.2.3.68.31.71.0

Note: Yes, I'm still using SHA1 here. SNMP authentication with SHA1 protocol needed to be enabled as a workaround on the Checkpoint firewall. Another workaround would be to manually patch the Perl Net::SNMP module to enable newer SHA protocols.

The reason for the OID not increasing error is a sanity check inside snmpwalk. From the man page:

Some agents (LaserJets are an example) return OIDs out of order, but can complete the walk anyway. Other agents return OIDs that are out of order and can cause snmpwalk to loop indefinitely. By default, snmpwalk tries to detect this behavior and warns you when it hits an agent acting illegally. Use -Cc to turn off this check

By appending -Cc to the snmpwalk command, the SNMP output is indeed complete:

nagios@monitoring:~$ snmpwalk -Cc -v 3 -l authNoPriv -u nagios -a sha1 -A secret -x DES -X secret -n vsid3 checkpointfw 1.3.6.1.4.1.2620.500.9003
iso.3.6.1.4.1.2620.500.9003.1.2.3.120.166.19.0 = STRING: "Gateway_AWS_Remote_Online_2"
iso.3.6.1.4.1.2620.500.9003.1.2.3.68.31.71.0 = STRING: "Gateway_AWS_Remote_Online_1"
iso.3.6.1.4.1.2620.500.9003.1.2.3.124.76.131.0 = STRING: "Gateway_AWS_Remote_Stage_2"
iso.3.6.1.4.1.2620.500.9003.1.2.3.121.55.141.0 = STRING: "Gateway_AWS_Remote_Stage_1"
iso.3.6.1.4.1.2620.500.9003.1.3.3.120.166.19.0 = Gauge32: 3
iso.3.6.1.4.1.2620.500.9003.1.3.3.68.31.71.0 = Gauge32: 3
iso.3.6.1.4.1.2620.500.9003.1.3.3.124.76.131.0 = Gauge32: 131
iso.3.6.1.4.1.2620.500.9003.1.3.3.121.55.141.0 = Gauge32: 131
iso.3.6.1.4.1.2620.500.9003.1.4.3.120.166.19.0 = STRING: "VPN_Community_AWS_Remote_Online"
iso.3.6.1.4.1.2620.500.9003.1.4.3.68.31.71.0 = STRING: "VPN_Community_AWS_Remote_Online"
iso.3.6.1.4.1.2620.500.9003.1.4.3.124.76.131.0 = STRING: "VPN_Community_AWS_Remote_Stage"
iso.3.6.1.4.1.2620.500.9003.1.4.3.121.55.141.0 = STRING: "VPN_Community_AWS_Remote_Stage"
iso.3.6.1.4.1.2620.500.9003.1.5.3.120.166.19.0 = IpAddress: 0.0.0.0
iso.3.6.1.4.1.2620.500.9003.1.5.3.68.31.71.0 = IpAddress: 0.0.0.0
iso.3.6.1.4.1.2620.500.9003.1.5.3.124.76.131.0 = IpAddress: 0.0.0.0
iso.3.6.1.4.1.2620.500.9003.1.5.3.121.55.141.0 = IpAddress: 0.0.0.0
iso.3.6.1.4.1.2620.500.9003.1.6.3.120.166.19.0 = ""
iso.3.6.1.4.1.2620.500.9003.1.6.3.68.31.71.0 = ""
iso.3.6.1.4.1.2620.500.9003.1.6.3.124.76.131.0 = ""
iso.3.6.1.4.1.2620.500.9003.1.6.3.121.55.141.0 = ""
iso.3.6.1.4.1.2620.500.9003.1.7.3.120.166.19.0 = IpAddress: XXX.XXX.XXX.XXX
iso.3.6.1.4.1.2620.500.9003.1.7.3.68.31.71.0 = IpAddress: XXX.XXX.XXX.XXX
iso.3.6.1.4.1.2620.500.9003.1.7.3.124.76.131.0 = IpAddress: XXX.XXX.XXX.XXX
iso.3.6.1.4.1.2620.500.9003.1.7.3.121.55.141.0 = IpAddress: XXX.XXX.XXX.XXX
iso.3.6.1.4.1.2620.500.9003.1.8.3.120.166.19.0 = Gauge32: 0
iso.3.6.1.4.1.2620.500.9003.1.8.3.68.31.71.0 = Gauge32: 0
iso.3.6.1.4.1.2620.500.9003.1.8.3.124.76.131.0 = Gauge32: 0
iso.3.6.1.4.1.2620.500.9003.1.8.3.121.55.141.0 = Gauge32: 0
iso.3.6.1.4.1.2620.500.9003.1.9.3.120.166.19.0 = Gauge32: 0
iso.3.6.1.4.1.2620.500.9003.1.9.3.68.31.71.0 = Gauge32: 0
iso.3.6.1.4.1.2620.500.9003.1.9.3.124.76.131.0 = Gauge32: 0
iso.3.6.1.4.1.2620.500.9003.1.9.3.121.55.141.0 = Gauge32: 0
iso.3.6.1.4.1.2620.500.9003.1.10.3.120.166.19.0 = Gauge32: 1
iso.3.6.1.4.1.2620.500.9003.1.10.3.68.31.71.0 = Gauge32: 1
iso.3.6.1.4.1.2620.500.9003.1.10.3.124.76.131.0 = Gauge32: 1
iso.3.6.1.4.1.2620.500.9003.1.10.3.121.55.141.0 = Gauge32: 1
iso.3.6.1.4.1.2620.500.9003.1.11.3.120.166.19.0 = Gauge32: 2
iso.3.6.1.4.1.2620.500.9003.1.11.3.68.31.71.0 = Gauge32: 2
iso.3.6.1.4.1.2620.500.9003.1.11.3.124.76.131.0 = Gauge32: 2
iso.3.6.1.4.1.2620.500.9003.1.11.3.121.55.141.0 = Gauge32: 2
iso.3.6.1.4.1.2620.500.9003.1.12.3.120.166.19.0 = Gauge32: 0
iso.3.6.1.4.1.2620.500.9003.1.12.3.68.31.71.0 = Gauge32: 0
iso.3.6.1.4.1.2620.500.9003.1.12.3.124.76.131.0 = Gauge32: 0
iso.3.6.1.4.1.2620.500.9003.1.12.3.121.55.141.0 = Gauge32: 0
iso.3.6.1.4.1.2620.500.9003.1.13.3.120.166.19.0 = ""
iso.3.6.1.4.1.2620.500.9003.1.13.3.68.31.71.0 = ""
iso.3.6.1.4.1.2620.500.9003.1.13.3.124.76.131.0 = ""
iso.3.6.1.4.1.2620.500.9003.1.13.3.121.55.141.0 = ""



Add a comment

Show form to leave a comment

Comments (newest first)

No comments yet.

RSS feed

Blog Tags:

  AWS   Android   Ansible   Apache   Apple   Atlassian   BSD   Backup   Bash   Bluecoat   CMS   Chef   Cloud   Coding   Consul   Containers   CouchDB   DB   DNS   Database   Databases   Docker   ELK   Elasticsearch   Filebeat   FreeBSD   Galera   Git   GlusterFS   Grafana   Graphics   HAProxy   HTML   Hacks   Hardware   Icinga   Influx   Internet   Java   KVM   Kibana   Kodi   Kubernetes   LVM   LXC   Linux   Logstash   Mac   Macintosh   Mail   MariaDB   Minio   MongoDB   Monitoring   Multimedia   MySQL   NFS   Nagios   Network   Nginx   OSSEC   OTRS   Office   PGSQL   PHP   Perl   Personal   PostgreSQL   Postgres   PowerDNS   Proxmox   Proxy   Python   Rancher   Rant   Redis   Roundcube   SSL   Samba   Seafile   Security   Shell   SmartOS   Solaris   Surveillance   Systemd   TLS   Tomcat   Ubuntu   Unix   VMWare   VMware   Varnish   Virtualization   Windows   Wireless   Wordpress   Wyse   ZFS   Zoneminder   


Update cookies preferences