1. Help Interal routing, IP Masq, PPP
I need a hand with my home network.
Two Linux boxes, "desktop" and "notey". They are both connected via ethernet and
a hub on an internal network 192.168.50.2 and 192.168.50.1.
"notey" also has a modem which dials into either work or local ISP, so its PPP
interface address changes. It is running IP Masquerading to "desktop". It is
also the DNS server for my internal network.
When I connect "notey" to another network via PPP, it comes up fine; both
"notey" and "desktop" can talk to the external network just fine.
"desktop" can telnet/ftp/ping/nslookup to notey, and, via Masq. to the world.
The problem is that "notey" can't telnet/ftp/ping back to "desktop" since there
is no route there. It passes the Masq. packets back ok, but no direct TCP
connection from "notey" to "desktop". The other way works fine.
I think this is because the default gw on "notey" is the PPP interface in the
other, external, network; and this knows nothing of "desktop" in my private
network, on eth0.
I've tried adding routes with /sbin/route add -net but I don't understand it
enough to make it go.
How do I add a route to "notey" so that it can talk back to "desktop"?
(bonus question: how come "notey" can answer "desktop"'s DNS questions with my
current setup, it cant be using TCP, can it?)
Current routing table on "notey" is:
Kernel IP routing table
Destination Gateway Genmask Flags MSS Window irtt Iface
22.214.171.124 0.0.0.0 255.255.255.255 UH 552 0 0 ppp0
192.168.0.0 0.0.0.0 255.255.0.0 U 1500 0 0 eth0
127.0.0.0 0.0.0.0 255.0.0.0 U 3584 0 0 lo
0.0.0.0 126.96.36.199 0.0.0.0 UG 552 0 0 ppp01
Thank you very much for any advice you can give me. Please note that I am dumb
and will need the answer spelt out in detail. Thanks again.
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