We are using the ForeFront TMG as a web proxy and from some days clients are facing the problem to access some of websites likehttp://www.hotmail.com , www.stc.com.sa, www.mohe.gov.sa and all other sites are working fine.
This happens suddenly without any ALERT in the TMG.Although public DNS Serers' IP had been removed from the OUTBOUND Network Adapter. But the problem is still.
I got the following ERROR while browsing the msn site on the page ...
<big>Network Error (tcp_error)</big>
A communication error occurred: "Operation timed out" The Web Server may be down, too busy, or experiencing other problems preventing it from responding to requests. You may wish to try again at a later time.
MCS
