Laura, I think you are correct and this is not a firewall problem.
I'd check to make sure the configuration of your router didn't change when you replaced hardware (the T-1). Sometimes during the tuning process a router gets configured properly but the configuration doesn't get written to flash. So your working configuration in memory goes away on power down. Specifically this sounds like a path MTU problem. The movie files may be having issues being fragmented for transport across the WAN. Liberty for All, Brian At 12:05 PM 12/12/2001 -0800, Laura Folden <[EMAIL PROTECTED]> wrote: >From: Laura Folden <[EMAIL PROTECTED]> >To: "'[EMAIL PROTECTED]'" <[EMAIL PROTECTED]> >Subject: Router problem? >Date: Wed, 12 Dec 2001 09:12:01 -0500 > >About two weeks ago, our Video department started having trouble FTP'ing >movie and flash files to the website (offsite). At around that time we >had a lightning strike that took out our T1 card, but this was replaced >quickly. We have a failover ISDN, but we cannot upload the files through >that. This is definitely not a firewall problem. > >It only happens to those type of files. It only seems dependent on size >when it is the movie files; flash files, regardless of size, won't upload >at all. The transfer for movie files stalls at about 50%. There is no >filtering and we have had our T1 and router tested. The same files, >zipped, run through just fine. When we remove the *.rm and *.fla >extensions, they still stall at the same place. > >Our traffic runs at about 30% of the full T UNTIL we start to upload these >types of files. Suddenly we run at 100% incoming--not outgoing--traffic. > >Sending the files from another location, or to another location, does not >help. Trying it from different computers, using different FTP programs, >does not help. > >Can this be a DOS attack? Has anyone experienced this? > >Thanks! >Laura Folden _______________________________________________ Firewalls mailing list [EMAIL PROTECTED] http://lists.gnac.net/mailman/listinfo/firewalls
