Problem in routing between two LANs

burrito · 07-03-2005, 03:45 PM

Code:

]Hi, 
I was experimenting with linux networking, I added a second subnet off my first,
everything works fine, Internet access, can ping and connect to all host with ssh
except I can't ping or ssh to 192.168.1.10 from 1.2 or 1.3,  I can from 1.1.
Also 1.10 has Apache on it and 1.2 and 1.3 can see web pages I have been playing with.
I am confused and wondering what I am missing here.
I got the O'Reilly book "Linux Network Administrator Guide", read through the
relevant parts numerous times.  Checked a number of on line howtos.  Stumped as to
why this doesn't work. Thanks in advance for any insights or suggestions.

Here is my setup.


		####### routes for 192.168.1.1 ########
dest		gw		genmask		flags	metric	ref	use	iface
192.168.2.0	192.168.1.10	255.255.255.0	UG	0	0	0	eth0
182.168.1.0	*		255.255.255.0	U	0	0	0	eth0


		####### routes for 192.168.1.10 multihomed with 192.168.2.1 ####
dest		gw		genmask		flags	metric	ref	use	iface
192.168.2.0	*		255.255.255.0	U	0	0	0	eth1
192.168.1.0	192.168.1.1	255.255.255.0	UG	0	0	0	eth0
192.168.1.0	*		255.255.255.0	U	0	0	0	eth0
default		192.168.1.1	0.0.0.0		UG	0	0	0	eth0

####### Network diagram ##########

		|  to internet
		ppp0
		192.168.1.1
		eth0
		|
192.168.1.0	-------------------------------------------------
		|	|		|		  	|
		eth0	eth0		eth0			eth0   
	192.168.1.2	192.168.1.3	192.168.1.4...		192.168.1.10
default	gw 1.1		gw 1.1		gw 1.1			gw1.1
netmask	255.255.255.0	255.255.255.0	255.255.255.0		255.255.255.0
								eth1
								192.168.2.1 
								no default gw 
								netmask 255.255.255.0
								| 
192.168.2.0	-------------------------------------------------------------------
		|
		eth0
		192.168.2.2	
		default gw 2.1
		netmask 255.255.255.0

Mara · 07-03-2005, 03:54 PM

I'm wondering if there's a type or not, but I think I shoudl mention it, because you have probably copied it, not written from scratch:

Code:

		####### routes for 192.168.1.1 ########
dest		gw		genmask		flags	metric	ref	use	iface
192.168.2.0	192.168.1.10	255.255.255.0	UG	0	0	0	eth0
192.168.1.0	*		255.255.255.0	U	0	0	0	eth0

Also, the duplicate entry at 1.10 for 192.168.1.0 doesn't look good. You should leave one (with no gateway).

burrito · 07-03-2005, 08:33 PM

Yes, that is a typo, thanks for pointing that out. It should be

Code:

		####### routes for 192.168.1.1 ########
dest		    gw		       genmask		flags	metric	ref	use	iface
192.168.2.0	192.168.1.1   255.255.255.0	UG	0	0	0	eth0
192.168.1.0	*                   255.255.255.0    U	      0	      0	       0      eth0

Removing the line on 192.168.1.10

Code:

dest		    gw	    genmask	    flags  metric   ref   use	iface
192.168.1.0	192.168.1.1	255.255.255.0	UG	0	0	 0    eth0

looked right to me also, but without it 192.168.2.2 can.t see the 192.168.1.0 network,
it does see the gateway 102.168.1.1. This does let 192.168.1.0 see 192.168.1.1 though.
I don't get it?

Thanks.