it could be some other host on your network. some broken network cards can cause such problems, try to disconnect one host after another untill you find the culprit...
then you have Matt show you the way again :
SCRATCH INSTALL
iftop is a good console bandwidth visualization tool that shows you active
connections, where they are going to/from and how much of your precious bandwidth
they are using. *OPTIONAL*
6. Go to
http://www.ex-parrot.com/~pdw/iftop/ and download the package
- to install this directly on the command line type:
- cd /usr/local
- wget
http://www.tcpdump.org/release/libpcap-0.9.4.tar.gz
- gunzip libpcap-0.9.4.tar.gz
- tar xvf libpcap-0.9.4.tar
- cd libpcap-0.9.4
- ./configure
- make
- make install
- cd /usr/local
- wget
http://www.ex-parrot.com/~pdw/iftop/dow ... .17.tar.gz
- gunzip iftop-0.17.tar.gz
- tar xvf iftop-0.17.tar
- cd iftop-0.17
- ./configure
- make
- make install
- iftop
- you are done