proxy arping?

[Igor Gueths]

Hi all. I have just recently had to check/send my mail using a friend's 
box, and that's when I noticed my current problem. Whenever I remotely 
run fetchmail, I periodically get a message similar to: "Disconnecting, 
corrupted MAC on input." I then ran Ettercap to see if indeed this was a 
Mac address problem. Then i noticed that the mac addresses for all the 
listed hosts were the same. I also found out that the replying Mac 
happens to be my current gateway (68.37.56.1). I found this out by 
looking at my routing table/current arp cache. I take it there's no way 
to disable/work around this, since this is on the ISP end? And why would 
an ISP use Proxy_arp anyway? And just recently, I have found that my ssh 
connections get killed with the same msg. Anyone have any ideas? Thanks!