I have a very strange IP masquerading problem.
Using the simplest setup described in the howto (see below), the
internal machine (192.168.1.2) can ping anywhere on the Internet through
the masquerading machine, but can only get WWW, ftp, etc. (and I assume
any other TCP-based services) from my ISP's machines (machines in the
ISP's subnet). Accesses to other systems on the Internet never succeed
(DNS works, but the internal machine never receives a response).
Details:
2 computers, both running Linux 2.0.36.
Machine 192.168.1.1 has an ethernet card and ppp connection to the
ISP (all services work fine from this computer).
Internal machine 192.168.1.2 has ethernet connection to 192.168.1.1
and uses it as its default gateway.
The kernel has been compiled with the appropriate options.
ipfwadm setup:
ipfwadm -F -p deny
ipfwadm -F -a m -b -S 192.168.1.0/24 -D 0.0.0.0/0
I have tried this setup with another ISP and it works just fine, but I
would like to use this ISP. Any thoughts as to why I can communicate
with systems within the ISP's subnet (including ftp, www, and news) but
cannot access anything else?
If there are any other relevant details I left out, please email me.
Any advice will be greatly appreciated.
- Bill Herrington
[EMAIL PROTECTED]
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