Clients on our LAN access websites using web proxy servers. One website (that is accessible from other LANs) does not work either through the proxy or directly.
I can see conns (state table entries) between the clients and the site but no I flag to show inbound data:
TCP out 188.8.131.52:80 in 10.10.2.17:2747 idle 1:44:44 bytes 920 flags UfO
TCP out 184.108.40.206:80 in 10.10.1.194:43022 idle 1:15:06 bytes 1038 flags UfO
The firewall rules allow access to any website.
Has anyone had similar issues with their firewall? Can anyone advise me on how to check if the firewall is filtering return traffic from the website?