Re: how can I connect 2 lan ?

From: Moe Trin (ibuprofin_at_painkiller.example.tld)
Date: 08/01/05


Date: Mon, 01 Aug 2005 14:31:40 -0500

In the Usenet newsgroup comp.os.linux.networking, in article
<W%oHe.23972$2U1.1536535@news3.tin.it>, Charly wrote:

>could you help me in this problem ?

        206074 Aug 25 2003 Ethernet-HOWTO
         40490 Jun 22 2000 Home-Network-mini-HOWTO
         45620 Jul 10 2000 Networking-Overview-HOWTO
         22582 Feb 6 2004 Reading-List-HOWTO
         71626 Apr 4 2004 Unix-and-Internet-Fundamentals-HOWTO

>I want to put in contact computer1 and computer2

[computer1 ~]$ /sbin/route -n
Kernel IP routing table
Destination Gateway Genmask Flags Metric Ref Use Iface
192.168.1.0 0.0.0.0 255.255.255.0 U 0 0 17 eth0
192.168.2.0 192.168.1.250 255.255.255.0 UG 0 0 17 eth0
127.0.0.0 0.0.0.0 255.0.0.0 U 0 0 20 lo
0.0.0.0 192.168.1.1 0.0.0.0 UG 0 0 15 eth0
[computer1 ~]$

[computer2 ~]$ /sbin/route -n
Kernel IP routing table
Destination Gateway Genmask Flags Metric Ref Use Iface
192.168.2.0 0.0.0.0 255.255.255.0 U 0 0 17 eth0
192.168.1.0 192.168.2.1 255.255.255.0 UG 0 0 17 eth0
127.0.0.0 0.0.0.0 255.0.0.0 U 0 0 20 lo
0.0.0.0 192.168.2.1 0.0.0.0 UG 0 0 15 eth0
[computer2 ~]$

[linux_box ~]$ /sbin/route -n
Kernel IP routing table
Destination Gateway Genmask Flags Metric Ref Use Iface
192.168.1.0 0.0.0.0 255.255.255.0 U 0 0 17 eth0
192.168.2.0 0.0.0.0 255.255.255.0 U 0 0 17 eth1
127.0.0.0 0.0.0.0 255.0.0.0 U 0 0 20 lo
0.0.0.0 192.168.1.1 0.0.0.0 UG 0 0 15 eth0
[linux_box ~]$ cat /proc/sys/net/ipv4/ip_forward
1
[linux_box ~]$

[router ~]$ /sbin/route -n
Kernel IP routing table
Destination Gateway Genmask Flags Metric Ref Use Iface
82.57.64.0 0.0.0.0 255.255.255.0 U 0 0 17 wan0
192.168.1.0 0.0.0.0 255.255.255.0 U 0 0 17 eth0
192.168.2.0 192.168.1.250 255.255.255.0 UG 0 0 17 eth0
127.0.0.0 0.0.0.0 255.0.0.0 U 0 0 20 lo
0.0.0.0 82.57.64.1 0.0.0.0 UG 0 0 33 wan0
[router ~]$

NOTES:
1. This assumes all boxes run Linux. windoze boxes will be similar, but
the command will be different, and the display more confusing.
2. You don't mention distributions or versions, so I can't tell you what
file to edit, or what tool to use to get the above configuration.
3. On computer2, the route to 192.168.1.0 isn't really _required_ as it
is covered by the default.
4. The router must be forwarding packets AND MASQUERADING (also called
NAT) to allow packets out to the world.

>Woudl be great if you can tell me how to do it becouse I really didn't
>understan...

http://tldp.org/guides.html
http://ibiblio.org/pub/linux/docs/linux-doc-project/

-rw-rw-r-- 1 gferg ldp 705493 Jan 5 2001 nag2.html.tar.gz
-rw-rw-r-- 1 gferg ldp 1604859 Feb 27 2001 nag2.pdf
-rw-rw-r-- 1 gferg ldp 1069355 Feb 27 2001 nag2.ps.gz
-rw-rw-r-- 1 gferg ldp 635097 Jan 5 2001 nag2.sgml.tar.gz

The 'nag2' is the second edition of the "Linux Network Administrator's
Guide", about a 500 page book in the dead tree version (O'Reilly and
Assoc., ISBN 1-56592-400-2, US$35), but yours for the free download.

        Old guy



Relevant Pages

  • Re: Traffic NOT moving through the correct network interface?
    ... Kernel IP routing table ... loopback interface, but that's not part of this problem. ... Everything is done by the kernel. ... Policy based routing requires you ...
    (alt.os.linux)
  • Re: combining internet connections
    ... > I was wondering if I can use both connections... ... Julian Anastasov's routing patches found here: ... If you are patching your kernel, you may also want to add some functionality ...
    (Fedora)
  • Re: B.a.t.m.a.n.
    ... user-space implementation or kernel implementation of something that has ... contrast those are network layer protocols that operate on top of IP. ... I think it a better version of the Optimized Link State Routing ... which needs a wifi driver that permits changing the mac ...
    (freebsd-net)
  • Re: kppp works wvdial doesnt for pppd (logs included)
    ... I've included .ppprc and /etc/ppp/options at the end if this post. ... pppd correctly set up with kppp I get the following. ... Kernel IP routing table ...
    (comp.os.linux.networking)
  • Re: Newbie - RedHat as router for windows98
    ... > Try Routing is a feature of the kernel, once the kernel is compiled it ... >routing it must be compiled with routing enabled. ... When I try to start the rip it doesn't start no errors just ...
    (comp.os.linux.networking)