Markus Falb wrote: > I would use tcpdump on the CentOS Server to be sure the icmp echo > requests are arriving or not. tcpdump is something like ethereal but it > could be as easy as > > $ tcpdump -l proto \\icmp > or > $ tcpdump -l proto \\icmp and host sourceip > or > $ tcpdump -li ethX proto \\icmp > or > ... Thanks for the instructions. Nothing seems to get through: -------------------------------------- [tim at helen ~]$ ping anghiari.homelinux.com PING anghiari.homelinux.com (79.46.6.203) 56(84) bytes of data. --- anghiari.homelinux.com ping statistics --- 3 packets transmitted, 0 received, 100% packet loss, time 2000ms -------------------------------------- -------------------------------------- [root at alfred tim]# tcpdump -l proto \\icmp tcpdump: verbose output suppressed, use -v or -vv for full protocol decode listening on eth0, link-type EN10MB (Ethernet), capture size 65535 bytes -------------------------------------- So I assume the modem is rejecting the ICMP packets. As I said, I don't see anything about this in the modem documentation or on the modem web-site. -- Timothy Murphy e-mail: gayleard /at/ eircom.net tel: +353-86-2336090, +353-1-2842366 s-mail: School of Mathematics, Trinity College, Dublin 2, Ireland