[plug] Need help deciphering tcpdump

Cameron Patrick cameron at patrick.wattle.id.au
Fri Oct 17 18:01:25 WST 2003


On Fri, Oct 17, 2003 at 05:49:47PM +0800, James Devenish wrote:
| So...ask the admin of that host to stop sending traffic to you
| ;-)

But ... but ... I /want/ that traffic and my gateway is rejecting it!

| > It also looks as if it might be IP masquerading-related, as from the
| > gateway box everything seems to work, whereas from a machine behind it,
| > the connection seems to hang and the I see ICMP unreachable packets.
| 
| Ah...are you blocking outbound ICMP?

Not that I know of.

| So the remote host has to repeatedly resent its queries? (The only
| reason I would mention this is that people like to break the Internet
| with simple rules like 'block all', etc.)

AFAIK All ICMP traffic (in both directions) and all outbound traffic
from ppp0 is being allowed.

Cameron.


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