Can WSA tunnel custom ports with PBR setup?
I am not able to have it working in my lab, even though HTTPS decryption is enabled and the port is set in HTTP connect, also tunneling of non-HTTP requests on HTTP ports is enabled.
a packet capture on WSA shows TCP retransmission.
I recommend you check out this data sheet with information about Cisco's WSA
In addition, you can also post this to the Cisco Support Community for additional feedback and information from Cisco technical experts.
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I cannot see your packet capture, I would recommend you check out this data sheet with information about Cisco's WSA