--- Net Llama! <[EMAIL PROTECTED]> wrote: > Some kind of crazy arp poisoning maybe? > > On Fri, 26 Sep 2003, Brad De Vries wrote: > > > I have a network of WinXX PC's with a single Linux > box > > acting as the gateway/firewall/dhcp server/e-mail > > server/etc. My Linux box connects to the ISP via > 128K > > ISDN dial-up line (too far away for DSL and cable > is > > N/A). > > > > When I first connect the Linux box to the ISP, I > can: > > 1) Use the Linux box to traceroute to everything > (the > > ISP blocked ICMP so I can't ping outside their > > network). > > 2) Use the Linux box to browse the web (using > Lynx). > > 3) Use the WinXX PC's to browse the web to "some" > > sites (google, domains hosted by ISP, etc.) > > > > When I first connect the Linux box to the ISP, I > can > > not: > > 1) Use the WinXX PC's to tracert beyond the first > two > > hops, Linux box is first and the ISP's router is > the > > second. > > 2) Use the WinXX PC's to browse the web to > anything > > "big" such as Yahoo!, ABCNews, FoxNews, > > WeatherChannel, etc. > > > > After a while (sometimes 5 minutes, sometimes 20 > or > > more) I begin to lose some functionality. Such as > > traceroute from Linux to the world or pinging the > > ISP's router, etc. The ISDN Terminal Adapter > (i.e., > > modem) sends the requests, the SD light goes on, > but > > never receives a reply, no RD light. > > > > I've been experiencing this problem for the last > week > > to 10 days. Does anyone have any thoughts as to > what > > might be the cause? I've replaced some hardware > > including the hub and cabling and I've tried using > an > > analog modem but the same problem persists. The > Linux > > box has been running for a very long time without > any > > changes. (For those of you heavily in the Windows > > world, a user rebooted the Linux box the other day > to > > see if it would fix the problem but it, obviously, > > didn't.) > > > > TIA, > > Brad. users
How can I determine if there is some "arp poisoning"? __________________________________ Do you Yahoo!? The New Yahoo! Shopping - with improved product search http://shopping.yahoo.com _______________________________________________ Linux-users mailing list [EMAIL PROTECTED] Unsubscribe/Suspend/Etc -> http://mail.linux-sxs.org/mailman/listinfo/linux-users
