Changing Source IP Address using NAT Policy on Sonicwall

I wanted to test a service where an internal IP address behind a Sonicwall used a different public IP address when connecting to a particular remote POP3 server. The following screenshot shows how this can applied   Jordansphere-PrivateIP = 192.168.5.40 Alt-External-IP = spare public IP address that was allocated to my connection via ISP mail.jordansphere.co.uk = REMOTE IP address Read More…

DPI-SSL and SSL v3.0 on Sonicwall

Scenario. I have a bespoke webserver behind a Sonicwall NSA 4500 (in HA mode) running DPI-SSL. I upgraded the webserver. This all went to plan but I couldn't access the server either via the VPN or externally.   We performed some packet traces and noticed that SSL v3.0 seemed to be initiated when connecting via the VPN or externally but Read More…