Hello, On Mon, 17 May 2004, Charles-Etienne.Dube wrote: > I did some tests with 2 cable modems, but now it is installed in a production > environment with 4 cable modems. At first, everything seemed to work fine.. > But now I had a couple of users tell me that some web pages were > not available while others were, and it semms to be a masquerading problem > since when I downgraded the system to one cable modem and normal routing > table with only one default gateway everything started working fine again (like > before). I am sure that the non-working URLs were valid sites that were available > at the time (ex: www.yahoo.com; www.google.com; www.hotmail.com). > > > Here are my questions : > > > 1 - Did I use to right patch ? I used "routes-2.4.20-9.diff" It is the right one > I tried to apply "05_nf_reroute-2.4.20-9.diff" Even if I'm used to > patching kernels, I don't understand that much about this process, and > the patch programm was giving error messages, while the one I use was applying > without any error messages. Stick with "routes-*.diff" because it is not enough to apply 05_nf* patch, there are two diffs to apply before it. > 2- Should I use : > > iptables -t nat -A POSTROUTING -o IFE1 -s NWI/NMI -j SNAT --to IPE1 > iptables -t nat -A POSTROUTING -o IFE2 -s NWI/NMI -j SNAT --to IPE2 > > instead of : > > iptables --table nat --append POSTROUTING --out-interface eth1 -j MASQUERADE -j MASQUERADE works for dynamic IPs and is recommended for complex routing situations when using the "routes-*" patches > Can anybody elaborate on the difference between these 2 commands. > > 3 - The 4 cable modems have a different IP, but two of them obtained an > ip in the same address class so they both have the same gateway. In my > script I treated them as if they were each on different gateways and I see > traffic going on the 4 modems so I don't think this is an issue but I'd > like to have some advice about this. What happens if all the IPs > are renewed at the same time and all 4 modems obtain an IP in the same > class with same gateway... will it still work ? If the gateways are same I assume they are on different interfaces. > 4 - do you think 4 cable modems is too much, has it been tested ? I do not remember how many nexthops allows the ip utility for multipath routes but 16 should be possible. > Help with this case would really be appreaciated, I am ready to give > any details that would be necessary for you to guide me further.. ip addr ip rule ip route list table all > Thank You > > Charles-Etienne Dube Regards -- Julian Anastasov <ja@xxxxxx> _______________________________________________ LARTC mailing list / LARTC@xxxxxxxxxxxxxxx http://mailman.ds9a.nl/mailman/listinfo/lartc HOWTO: http://lartc.org/
