On Thu, 2004-07-01 at 01:30, Andrea Giuliano wrote: > Dear all, > > trying to make my ADSL connection working, I ran across this suspicious > line in the output from "tcpdump -i ppp0": > > 23:50:26.876061 IP 192.168.100.1 > 82.53.151.158: icmp 36: host 217.144.248.190 unreachable - admin prohibited filter > > The output is full of such lines (you can see the whole output below). > What do they mean? Who's the admin? Myself on my local host or the admin > of the remote host (in other words, one of the ISP's admins)? What are those addresses that you mention? "admin prohibited filter" means that there's a firewall that blocks a connection, and it does that in the most user-friendly way possible: it send back an ICMP packet that means precisely that: the admin of that firewall doesn't want those packets to get through. It could be a firewall at the destination site. It could be a firewall in between. It could be iptables on your own Linux machine. :-) It all depends on what those IP addresses are. -- Florin Andrei http://florin.myip.org/
