Configure Your Firewall for SNMP
KB ID 0001034 Problem Had a requirement to let SNMP traffic though a firewall this week, I have a client that has both SolarWinds and SCOM, and they need to monitor the external Citrix ADC load balancers. For SNMP we simply need UDP ports 161 and 162 (See below) but SolarWinds maintains ‘ping’ connectivity to the monitored assets, so ICMP also needs to be open. Inbound Ports Outbound Ports Solution As my ‘weapon of...
Cisco ASA – ‘access-group’ Warning
KB ID 0001035 Problem I’ve been writing Cisco ASA walkthroughs for years, and littered all over PeteNetLive you will see me warning readers every time I use access-group commands. So I’ve finally got round to putting this article up so I can reference it in future. What is an Access-Group command? You use an access-group command to apply an access-list to an interface, in a particular direction (in or out). Although I...