Firewalling, Security

Cisco ASA: DNS reply filtering

René Jorissen on August 28, 2009 7 Comments • Tags: #asa #cache #class #dns #drop #expression #filtering #inspect #inspection #map #policymap #regex #regular #request #url

Today I was asked to block access to multiple websites and the only device capable of doing this was the firewall. This customer is using a Cisco ASA firewall, which supports basic URL filtering. This customers wanted to block HTTP and HTTPS websites. HTTPS websites use a SSL tunnel from the end device to the … Read More

Firewalling

Failed to establish VPN through PIX

René Jorissen on October 17, 2008 5 Comments • Tags: #1723 #305006 #47 #asa #creation #failed #firewall #for #gre #pix #pptp #protocol #regular #stateful #translation #vpn

We migrated our Internet connection lately and reconfigured our PIX firewall. We added some memory to install the latest firmware version (8.0(4)). After putting the PIX firewall in production some of the employees were complaining they couldn’t establish any PPTP VPN Tunnels anymore to customers. Every time when some one called me, I tried it … Read More