El 19/12/2010, a las 19:01, Les Mikesell escribió:
On 12/19/10 11:07 AM, Jose Maria Terry Jimenez wrote:
Hello All
First, sorry by my poor english, hope you understand me :-)
I have a problem, i don't understand or don't know how to solve
I need to interconnect 2 networks with different numbers. One is 192.168.236.0/24 the other 192.168.1.0/24. Mainly i need to access services in the 236. from the 1. one.
I have a CentOS 5.5 machine with 2 nics each one configured to work in one of the nets. The CentOS also uses a router for Internet access that is 192.168.1.1.
192.168.1.0/24 >-----192.168.1.100--[CentOS Machine]--192.168.236.74 --------< 192.168.236.0/24
So, i enable forwarding in the CentOS box
echo '1' > /proc/sys/net/ipv4/ip_forward
And in one machine of the 1. network (this is Fedora14) I add the route:
route add -net 192.168.236.0 netmask 255.255.255.0 gw 192.168.1.100 dev eth0
Since this moment i can ping or access (ssh/http) another CentOS machine in the 236 network ping 192.168.236.74 PING 192.168.236.74 (192.168.236.74) 56(84) bytes of data. 64 bytes from 192.168.236.74: icmp_req=1 ttl=64 time=0.281 ms
But can't access or ping other machines (NOT Linux ones), ie, printers, Win servers, etc...
Also tried adding: route add 192.168.1.100 eth0
before the route add -net, but no efect.
This fails even if i flush IPTables.
In the CentOS box that replies, i did nothing, it 'just' works.
Can anyone tell what is happening / help me with this? Something to do missing in the CentOS router that joins the networks?
First make sure that you can ping/access those 'other' services from the centos box with 2 nics. It should source from the .236 interface and 'just work'. If not, you have firewalls or something else blocking traffic. When you route other traffic from the .1 network, the destination machines need some reason to send the return packets to the 192.168.236.74 address. You can either add the route to every machine or on the router that is currently their default router.
-- Les Mikesell lesmikesell@gmail.com
Thank you Les,
Yes, i can ping/access those 'other' services from the CentOS box with 2 NICs.
I understand that i need, for example in a networked printer in 236. network a 'return' route. I definitely have no access to configure network on every machine in the 236 network (only a few), nor the router...
This can't be solved any other way?
Best