Dear All,
I have recently deployed a virtual Sophos, it is acting as Direct Proxy behind a internet firewall, and i put the virtual Sophos on proudction, end user computer enabled proxy in their browser and everything work as expected, and after a period of time like an hour, i found the end user computer not able to reach internet, i tried to access the sophos console https://192.168.81.242:4444 its doesnt reach, but could ping, when i disabled the proxy from end user computer's browser, i could access the sophos portal without an issue, after checked the logs viewer, there is no related log from the computer that has proxy enable, and check the NAT rule, there is no more hit count appearing in the rule, its seem like proxy client no longer be able to reaching the proxy, and then i reboot the Sophos, and its resumed normal, but after like an hour problem occurred again, any idea what goes wrong ?
i followed the following guide to setup the direct proxy, but did not enable the following features
• Scan HTTP and decrypted HTTPS
• Block QUIC protocol (This option blocks Google QUIC traffic over UDP 443 and 80)
• Decrypt HTTPS during web proxy filtering
support.sophos.com/.../KB-000035921
LAN A:192.168.81.242
WAN:10.0.0.1 Dummy IP
LAN C:172.16.16.16
Firewall rules
Inside Firewall rule
NAT rules
inside NAT rules
keith
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