Cisco Firewalls and PING
KB ID 0000351 Problem With regards to Ping, out of the box a Cisco firewall will allow you to ping the interface you are connected to, so in a normal setup inside clients can ping the inside interface, and the firewalls outside interface can be pinged from outside. OK – to understand pinging through a Cisco Firewall you need to understand that Ping is part of the ICMP protocol suite, and unlike other protocols is not “connection...
Windows Firewall – Enable ‘Ping’ / ICMP Echo Reply
KB ID 0001134 Problem By default all modern distributions of Windows come with their client firewall enabled. Which is a good thing, most corporate networks simply disable it using the rationale that they have a corporate firewall and security software etc. Again thats fine, but what if you want to leave it on, and still be able to ping that host to see if its alive. Solution The firewall exception is already written for you, you...