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I replaced the web proxy from Barracuda to Sophos XG yesterday, I follow the solution of this link https://community.sophos.com/kb/en-us/123522, our network have different zone, the gateway for all zone is Cisco ASA firewall, the Sophos XG is in the zone DMZ as web and email proxy, I use the same IP and Port of old Proxy (Barracuda), because we don't want to change the Proxy configuration on every PC. now I meet a critical problem, the web performance is very slow after I replace web proxy from Barracuda to Sophos XG, in the past, the user can open a web page without any delay, but now the user have to wait 5-10 second to open a web page, I try to disable the IPS and WEB POLICY , but still same . when I use chrome, I can see the message on the bottom " waiting for proxy tunnel...." when the page is loading, I confirmed the auto search proxy is disable on browers . I made an another test, put the Barracuda web protection online again , then change the proxy server to Barracuda IP on PC's browers, user can open web page immediately. it seems that Sophos XG has problem , who can help me to solve this issue, I am really appreciate your help.
how do the users get to the XG?
Possible the issue is the way your DNS is setup? The XG needs to be in the DNS path.
In reply to rfcat_vk:
Such deployments could also cause a Routing issue.
Please investigate the Proxy log with proxy debug enabled.
service awarrenhttp:debug -ds nosync
(Same command to disable the proxy debug).
/log/awarrenhttp_access.log should show something.
Can you post some entries? There should be a time reference for each request.
all the user's browser has been configured Proxy server (here is Sophos IP) by GPO, the client can reach the Sophos.