I just realized I wasn't clear what the likely cause of your problem is. The problem may be caused by the server you are talking to. Can you access the servers that your clients use from your location? Then running 'gnutls-cli -d 4711' against that host may give enough details to resolve it.
Earlier bug reports of this kind suggests that the server is buggy (which can be worked around), but it may also be that the Cisco box is filtering out the traffic if you are only seeing the problem behind those boxes. /Simon -- To UNSUBSCRIBE, email to debian-bugs-dist-requ...@lists.debian.org with a subject of "unsubscribe". Trouble? Contact listmas...@lists.debian.org