how can I connect 2 lan ?

Hi guys,
could you help me in this problem ?

WAN
|
Router(192.168.1.1)---------computer1(192.168.1.22)
|
|
Eth0 (192.168.1.250)
|
LINUX BOX
|
Eth1 (192.168.2.1)----------computer2(192.168.2.44)

I want to put in contact computer1 and computer2

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

Thanks

Charly wrote:
> Hi guys,
> could you help me in this problem ?
>
> WAN
> |
> Router(192.168.1.1)---------computer1(192.168.1.22)
> |
> |
> Eth0 (192.168.1.250)
> |
> LINUX BOX
> |
> Eth1 (192.168.2.1)----------computer2(192.168.2.44)
>
> I want to put in contact computer1 and computer2
>
> Woudl be great if you can tell me how to do it becouse I really didn't
> understan...
>
> Thanks
>
>
>

The Linux box is not doing NAT is it?

What do you mean by 'in contact?' Ping, NetBIOS, what?

--
Respectfully,


CL Gilbert

In comp.os.linux.networking Charly <(E-Mail Removed)>:
> Hi guys,
> could you help me in this problem ?

> WAN
> |
> Router(192.168.1.1)---------computer1(192.168.1.22)
> |
> |
> Eth0 (192.168.1.250)
> |
> LINUX BOX
> |
> Eth1 (192.168.2.1)----------computer2(192.168.2.44)

> I want to put in contact computer1 and computer2

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

Switch on IP forwarding 'echo 1 > /proc/sys/net/ipv4/ip_forward'
as root. Systems on both LANs need to have a routing entry to
reach the other through 192.168.1.250/192.168.2.1 or their
default gateway must know it.

Good luck

--
Michael Heiming (X-PGP-Sig > GPG-Key ID: EDD27B94)
mail: echo (E-Mail Removed) | perl -pe 'y/a-z/n-za-m/'
#bofh excuse 174: Backbone adjustment

In the Usenet newsgroup comp.os.linux.networking, in article
<W%oHe.23972$(E-Mail Removed)>, 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

On Mon, 1 Aug 2005 19:59:26 +0200, Michael Heiming <michael+(E-Mail Removed)> wrote:

> In comp.os.linux.networking Charly <(E-Mail Removed)>:
> > Hi guys,
> > could you help me in this problem ?
>
> > WAN
> > |
> > Router(192.168.1.1)---------computer1(192.168.1.22)
> > |
> > |
> > Eth0 (192.168.1.250)
> > |
> > LINUX BOX
> > |
> > Eth1 (192.168.2.1)----------computer2(192.168.2.44)
>
> > I want to put in contact computer1 and computer2

# network topology
# `````````````````
# ---------------- ------------ LAN
# ( ) Phone | | Machines
# ( Big Bad Internet )--------| ADSL Modem |
# ( ) Line | | 100-Base-T ------
# ---------------- ------------ Switch | |
# | ------| |
# Public IP | X_WORLD | | |
# X_LOCAL2 | | |_| ------
# 192.168.2.0/24 ------------- | /
# 10-Base-2 coax | ppp0/eth1 | ---/ ------
# | | | \ | | |
# c=o=---------=o=---------=|eth2 eth0|------|/ /|----| |
# | | | | | \ | | |
# ----- ----- | Firewall | ---\ ------
# | | | | ------------- | \
# | | | | | |_| ------
# ----- ----- | | |
# ------| |
# X_LOCAL | |
# 192.168.1.0/24 ------
#

Combination of having a localnet controller in firewall, then
consider nameserver, router control. I use iptables based
firewall + dnsmasq for nameserver and DHCP server to windoze
boxen.

Grant.

--
Whom computers would destroy, they must first drive mad.