connection oddities

[Brian]

Gregory K. Ruiz-Ade wrote:
> We're tryign to figure out at work why any type of file transfer isn't 
> working over a Cisco hardware VPN link, but interactive sessions are 
> working just fine.
> 
> I.e., SSH/slogin sessions work fine.  Telnet works fine.  scp or rsync via 
> ssh never even get to the first byte after touching the destination file.
> 
> Same behavior in either direction.
> 
> even zmodem xfers over telnet stop before any actual data is passed.
> 
> But, we can telnet or ssh in and work all day long just fine.
> 
> any ideas?
> 
> Gregory
vpn mtu causing a problem?  I've seen cases where lowering the mtu from 
1500 bytes to 1400 bytes on devices along the path, so that the addition 
of the VPN header keeps the packet under 1500 bytes and allows 
successful communication.

	Brian