service access denied to DLLs

[HVE]

Hi,

there seem be be quite a lot of people with similar problems. We think
we've found some more useful information that might lead to a solution.

Any ideas are welcome

Hans

Hello Shailesh,

we're experiencing the same issue with some of our ASP.NET
applications as well as with a remoting app : the ACLs are ok, yet
access is denied. Modifying a byte in the dll solves the issue
temporarily. BTW, the problem occurs on our own DLLs.
We suspect our McAfee NetShield to cause the problem since everything
had been running fine for over a year until the last update to
NetShield last Friday. We've also had similar issues before where
outbound files were scanned. Disabling outbound scans solved that
problem.

Do you have antivirus on your server too? I'll see whether our
SysAdmin agrees in running a FileMon trace on one app, maybe I'll know
more then.
Do you still experience the problem?

Best Regards

Hans

Hi Shailesh,

I've found a way to reproduce the problem :

Starting from a working system, I set the Archive flag off for the DLL for
which access was denied before.
I try to re-run the application : Access Denied.
I reset the Archive flag and re-run the application : Access Denied
I modify the dll phyiscally and re-run the application : working again.

This might indicate that either the antivirus or the backup program (which
resets the Archive flag after a backup) cause the problem.

Best Regards

Hans

 

[HVE]

Hi,

there seem be be quite a lot of people with similar problems. We think
we've found some more useful information that might lead to a solution.

Any ideas are welcome

Hans

After excluding the application directories from virus scans, I ran
sysinternals' Filemon tonight and discovered that the remote agent for
Backup Exec reset the Archive flag. Immediately afterwards, we got the same
error again.

This is weird, because the backup system has been running for more than a
year without any problem. Nothing has changed in the setup.

Hans