Hello,

I have tow Networks with 172.16.1.0/16 and 192.168.1.0/24 and I want to configure both network and should ping each other my server IP is 172.16.19.66 and I use CentOS and I want other Network should ping my server.

help me please.

192.168.1.0/24 is a subnet of 192.168.1.0/16. I never faced this type of things.

Use two different subnet like, 192.168.1.0/24 & 192.168.2.0/24.

Then sent me the output of "ifconfig" & "netstat -rn".

Ifconfig output


[root@rahil ~]# ifconfig
eth0 Link encap:Ethernet HWaddr 00:0A:CD:09:0B:79
inet addr:172.16.19.66 Bcast:172.16.255.255 Mask:255.255.0.0
inet6 addr: fe80::20a:cdff:fe09:b79/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:79694 errors:0 dropped:0 overruns:0 frame:0
TX packets:64420 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:51493343 (49.1 MiB) TX bytes:21024959 (20.0 MiB)
Interrupt:169 Base address:0xec00

netstat putput

[root@rahil ~]# netstat -rn
Kernel IP routing table
Destination Gateway Genmask Flags MSS Window irtt Iface
192.168.122.0 0.0.0.0 255.255.255.0 U 0 0 0 virbr0
169.254.0.0 0.0.0.0 255.255.0.0 U 0 0 0 eth0
172.16.0.0 0.0.0.0 255.255.0.0 U 0 0 0 eth0
0.0.0.0 172.16.1.1 0.0.0.0 UG 0 0 0 eth0


I have tow networks both networks should ping each other without router is it possible.

You can configure two ip addresses (ip aliasing) to the server, one from each network.
AFAIK, it is not possible to connect two different sub-net without any network device (router/bridge etc).

Hi rahilmaknojia,

Is adding another network card for the 192.168.1.0/24 network an option for you? If you can do so, the networks should be able to communicate by enabling ip-fowarding and adding a few static routes.