Today I encountered a very strange problem.

System Environment: Windows 2003 SP1, sqlserver 2005,. NET Framework 2.0 3.0 3.5, no firewall software

3.5 is installed with vs2008.

The system was running normally for two and a half days. Suddenly the website could not be opened at noon today. You can check it on the server remotely.

Then the system restarts. After the restart, the system can be normally Accessed at the beginning. After about one minute, the browser did not respond.

Access from the localhost address on the server is normal.

Then, try iisreset. It is normal to restart the IIS Internet. After about 1 minute, the internet address cannot be opened again (including the server's Internet IP address ). however, it is strange that the localhost address can be used for normal access.

I figured out whether it was an attack. I had to look at iis log records, and the reverse connections were normal.

After getting started, I found that the static. html page is normal no matter how long it takes, as long as it is An ASPX file that can only be restarted by IIS, it will be normal.

Directly put. net Framework 2.0 to 3.5 Delete All. then reinstall 2.0 ., the Forum is normal, but the homepage may not be available (the Homepage uses LINQ). I suspect it was the ghost of the fw3.5 test version.

Have you ever encountered such a problem?