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Zalo application can't action call with proxy Sophos XG

Nam Trinh Dong

Dear All,

I meet a problem, please support me in this case.

I have created a rule with full access internet on Sophos XG firewall. But the app Zalo on PC (social apps) can't make calls, other features like chat, transfer file works normally.

We have applied Proxy config (via GPO) for all computer users to point to Sophos proxy.

And when I use the gateway (change config IP gateway on PC of User) instead proxy, the app Zalo can make normal calls.

So It could be the app can't work normally with the proxy of Sophos XG? Please help me to find the root cause and any solution to resolve that problem.

Thanks



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[edited by: Erick Jan at 2:59 AM (GMT -7) on 30 May 2023]
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  • 0 in reply to rfcat_vk

    Hi Lan, 

    I tried to follow your solution - add exceptions on Sophos config, it doesn't work.

    I think packages of the app didn't go through a proxy (at PC) 100%. The network needs config "Gateway of last resort" - the last route for avoiding the Core-Switch drop the package which does not match with the table route.

    I have executed that config in a lab, and it works.

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