I have a new networking problem that is driving me crazy. Last week, I suddenly started having problems accessing a specific domain name. I haven't changed anything about my network settings or installed anything on my Mac that has the problem. For some unknown reason, when I try to access anything on http://<Domain>, I can only get about a megabyte of data through to my end before I am totally locked out. My browsers insist that the server has closed the connection, and this lockout lasts approximately three minutes. Then the domain name becomes accessible again, until I try to transfer more data, and then I'm locked out again. Here's what I've found out so far: When I am locked out, the lockout extends to everyone on my network segment. It's as if something is flooding the network with bad requests, like a Denial of Service attack. Once the lockout is released, other local machines and other Mac OS X profiles on the same machine and using the same browser software have no problems accessing the Website in question. While the lockout is happening, I can access pop.<Domain> (e-mail) and ftp.<Domain>. I can also ping the domain name successfully, but anything related to HTTP transfers to this domain remains locked out for approximately three minutes. This problem is specific to this domain name only. I can access other Websites without problems while this lockout is happening. Does anyone have any suggestions for what could possibly be causing this problem? I am at wits end! I've been blaming everybody else for two days, and am now very embarrassed that the problem appears to be somewhere in my own OS X user profile.