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Routing with 2 ISP



Hello guys,

Sorry to bothering you.

I had a small network with one ISP and firewall.

eth1 -> Is connected to my ISP
eth0 + eth0.1 , eth0.2 and etc are my local networks.

All my network accesses internet via eth1.

My routing table looks like the following :

213.194.242.0   0.0.0.0         255.255.255.0   U     0      0        0 eth1
10.123.20.0     0.0.0.0         255.255.255.0   U     0      0        0 eth0
10.123.10.0     0.0.0.0         255.255.255.0   U     0      0        0 eth0
10.123.11.0     0.0.0.0         255.255.255.0   U     0      0        0 eth0.8
10.123.42.0     0.0.0.0         255.255.255.0   U     0      0        0 eth0.5
10.123.123.0    0.0.0.0         255.255.255.0   U     0      0        0 eth0.7
10.123.40.0     0.0.0.0         255.255.255.0   U     0      0        0 eth0.4
10.123.30.0     0.0.0.0         255.255.255.0   U     0      0        0 eth0
10.123.44.0     0.0.0.0         255.255.255.0   U     0      0        0 eth0.6
169.254.0.0     0.0.0.0         255.255.0.0     U     0      0        0 eth0.8
0.0.0.0         213.194.242.1   0.0.0.0         UG    0      0        0 eth1

Recently I have added secon provider via ADSL.

ADSL modem is connected via eth0.8 . Using adsl-setup I have created
ppp interface ppp0.

Now I want to achieve the following :

Computers from local network range 10.123.123.0/24 (eth0.7) should
access internet using my second internet provider via ppp0.

I believe that for that I need to use advanced networking and iproute package.

I will add the second routing table named "adsl" and configure routing
via ppp0 there. Together with that i need to set in iptables , nat
table to masquerade all ips going out via ppp0.  I believe I need to
use ip command for this.

And the finally my questions are :

1) Is there a good tutorial / howto for using iproute on the internet,
except of the LARTC.org
2) Can i utilize by tools of Fedora, to have my configuration (with
second routing table, using ip ) somehow stored - to be permanent when
I will do machine restart? I mean there are networking-scripts
/etc/sysconfing/network-scripts which can handle, IP assigment,
virtual LANS, aliases even static routes. Can they handle advanced
routing as well?

Thank you milion times.

David Hlacik


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