On Friday 08 November 2002 2:39 am, James Stickland wrote: > A while ago, while simultaneously icmp pinging my isp's dns server and > viewing the tcpdump of the interface to which the icmp requests/replies > were going out/in from, i realised that my ISP's DNS server drops icmp > ping requests, and instead replies with a message visible to tcpdump > something along the lines like this: "This server does not allow ping > replies." > > My question is, would there happen to be a jump i could do with netfilter > that would enable me to send out such a message for certain types of > packets coming in? Probably. What was the reply you saw ? (Presumably you can recreate it by pinging your ISPs DNS again ?) I just made a guess at your ISP from the headers of your email, looked up their DNS servers, and pinged them - I got nothing back (I was running tcpdump to check for anything that ping might not tell me). Hopefully I guessed the ISP wrongly, or something.... I'm interested to know what message you saw meaning "this server does not allow ping replies".... Antony. -- It is also possible that putting the birds in a laboratory setting inadvertently renders them relatively incompetent. - Daniel C Dennett
