NAT corrupts downloads

Intel server / NA
May 27, 2009 at 11:59:51
Specs: Windows 2008
So.. get this... I have Windows 2008 routing and remote access serving up the Internet. Downloads get corrupted.

1. If I route through another server it works, so, it's not the network equipment or ISP.

2. If I download with the server itself, and then move the file via Windows Share, the file is fine, so it is not the network hardware within the server.

3. The internet works fine. Very fast.

4. It is only downloaded files that get passed through NAT on the Windows 2008 machine that get corrupted.

Any thoughts?

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May 27, 2009 at 12:21:06
NAT has nothing to do with files.

Conduct the following test please

Download a file to the RRAS 08 server
Download the same file to a workstation.

What is the file name including extension?

Compare the byte count. What are they?

Does the file open on the server?
Does the file open on the workstation?

If it doesn't open what is the error?

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May 27, 2009 at 12:28:54
I've already done this.

I used a download of MS website of an 80MB video file for fable. Same byte count, same name.

Workstation, any workstation running through RAS on 08 has CRC's in the zip file... (or corruption on any of the dozen others I've tried). The server itself downloads the file fine, and I can even move the file to the client via windows networking and it is fine.

The downloaded files that pass through RRAS get corrupted. I've tested this a 100 ways.

There error is different for each file downloaded. zip files are CRC errors, exe files have execution errors.

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May 27, 2009 at 13:09:40
We need to be on the same page.

You are telling me the byte count of the downloaded file to the server or via rras to a workstation is EXACTLY the same?

Familiar with the FC command [file compare]?
use FC to compare the two downloads. Post the results.

Have you run chkdsk /r on the RRAS server?
RRAS server malware/spyware/virus free?
RRAS server been defragged lately?
Firewall enabled on the RRAS interface?

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Related Solutions

May 28, 2009 at 07:33:56
chkdsk good, defragged yes, virus checked yes,
firewall is Windows 2008, the hardware firewall is shared by the working server, and I even switched ports to see if it was that. There have been no changes to the software firewall since it was working

I'll put the FC in a separate post, but I prolly need to find a smaller non zip file to try.

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May 28, 2009 at 07:37:57
Oh... btw, I can use a 3rd party proxy (winproxy) and it works.

This website keeps choking when I paste in the file compare.
Using zip files, it's pretty much gobbldy gook anyway.

The byte counts are exactly the same down to the digit.

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May 28, 2009 at 08:13:03
Sounds like a bug in RRAS 2008. I would contact Microsoft and open up a ticket.

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