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@xxxxxxxxx
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
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