Some web pages won't load when connected via VPN/AC client

[patrickjgalligan]

I have an ASA with 9.1(2) and latest AnyConnect and VPN clients. When I connect using either AC or VPN client, management web pages for Cisco UCS C Series servers, and VMware vSphere client will not load. Packet capture shows a RST in response to SYN. I have tried numerous MTU settings (lowest of 576). Does anyone have any ideas on what is causing this?

[Michael Muenz]

RST packet means that the service is not running. There could be either a firewall between, sending RST's when the connection is not allowed

Michael

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[patrickjgalligan]

That is one reason for a RST, but the service is definitely running. Works fine from the LAN/WAN and also with a different VPN solution (I think it is a Windows server, using L2TP). The only firewall in the path is the ASA that is terminating the VPN.

[patrickjgalligan]

Ok, I am kicking myself here. ASA has a Content Security module. Traffic was being redirected to it, but it's not licensed for URL filtering. I turned off the redirection and all is good.