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…
Category: Sonicwall
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…
Adding a Secondary WAN Subnet to Sonicwall and a Cisco
Example: Current WAN IP range: 100.100.100.0/24 Sonicwall WAN IP: 100.100.100.100 Cisco Router: 100.100.100.1 New WAN IP range: 101.101.101.0/27 You can add a static ARP entry on the Sonicwall but there is an easier method. Simply set a Read More…
ICMP Packet Dropped Due to Policy – Over Sonicwall VPN
Site A required the following site-to-site VPN created. The above was all created with ease and the VPN connection came up. Site A then requested that the ONLY service allowed over the VPN was "Ping". The following 2 firewall rules were applied: VPN -> VLAN ZONE And the reverse for VLAN ZONE-> VPN However, this didn't work Read More…
Error connecting to an Oracle DB over Sonicwall site-to-site VPN
Scenario: A Sonicwall TZ170 (standard firmware) was replaced with a TZ215 (Enhanced ). After installation we could not establish a connection to the main Oracle DB over a site-to-site VPN. Pings and all other services were working fine. To get this working go to Firewall Settings -> Advanced Select SQL*Net From Enable FTP Transformations Read More…
How much bandwidth does Netflix use?
I was curious as to how much bandwidth Netflix uses when watching a movie. I decided to monitor this by watching Warrior starring Tom Hardy and Joel Edgerton. Runtime was 2:19 hrs. My 21CN broadband connections sync rate is ~6Mbps. Using my PS3 plugged directly into a Sonicwall TZ 210 I SNMP monitored the port Read More…
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