On Sun, 2001-11-11 at 00:26, Michael Patterson wrote: > Ok, I'm totally frustrated. To bring anyone who doesn't know up to date: > > My previous service was "wantweb". I was given a static IP address, upon > which I set up a debian (potato) box. I used IP masquerading to connect all > my windows boxes to it (for game playing, you know). > > Now I find that the company is going under. enter the cablemodem. I have > cablemodem service with Adelphia cable. ( @home). it works beautifully when > I hook up a single windows machine to it, using DHCP. > > When I hook up my linux box to it, I get terrible performance, and > eventually my connection to the cablemodem fails. I can get the connection > back by powercycling the cablemodem. I'm using dhcp-client. > > DHCP appears to be working find after changing my /etc/networks/interface > to: > > iface eth0 inet dhcp > hostname "****" > leasehours 1 > leasetime 3600 > > > ifconfig verifies that I have an IP address, etc. (and, as I said earlier, > the connection works fine, but with poor performance, and eventually > dropping.) When the connection stops working, ifconfig reports the same IP, > etc, but starts reporting drops. > > switchig to a static address, using what DHCP gave me still gives the same > results. > > > I'm finding this EXTREMELY difficult to debug, since it isn't an out-and-out > failure. The cablemodem howto isn't much help, either. Any help would be > appreciated. > > --Mike
Do you have a firewall in place? I found out about two issues in my struggles. I found that without /proc/sys/net/ipv4/dynaddr set to 1 my second and future dhcp requests would try and go out the eth1 static internal card which was being blocked from sent by my firewall (source<=>adaptor anti-spoofing rules etc). I also found that my cable modem keeps sending me IGMP multicast packets that if I blocked the service would get flaky, at least as far as I recall. Albiet that this was with pump that had it's own set of problems but I have charter @home working "almost perfectly" with dhcp-client. My current setup still requires rebooting the modem (and perhaps not the pc next time, have to try that) on occassion but otherwise works very well. --mike
