I'm having a very weird situation on my Window Server 2008 R2 hosts.
In these hosts, we have an ASP.NET Application hosted with IIS 7.0.
The problem is that, eventualy, one of the clients' IP is blocked by the server. In other cases, our own IP is blocked, but this IP is allowed as "full trust" in Windows Firewall.
When this problem occurs, we just ping the blocked client IP from the server, and it is automaticaly unblocked.
I have tested with Microsoft Network Monitor to see if the packets are coming, and they are, but the server does not respond them.
How I can solve that?
Best Answer
I ran into a similar issue about a year ago, my file server was not recognizing one of the clients. I did the following:
Start->Run-> cmd (enter)-> arp -d * (enter)
Let me know if that helps.