Centos second network interface

[alamb200]

Hi,
I am setting up come monitoring using Centreon and a Centos server and I have got stuck.
The network I am monitoring has Servers on two IP address ranges 172.16.0.0/16 and 10.1.0.0/24 and I need to be able to monitor both sets of servers from the same device.
I have set up the Centos device to minitor the 172.16 network with out any problems and I have now turned my attention to the other network, to this end I have added a second interface to the Server and assigned an IP address, subnet, but no gateway.
When I restart the network I can ping servers on the 2nd network, for around 20 seconds, and then the ping stops responding, if I restart the network again, I get teh same again.
What am I missing?
Thanks for any help given.
alamb200

 

[dcbrown73]

I believe you need to setup a second routing table for the second subnet / adapter.

it's been a while since I've done anything like this, but look up iproute2 command and how to set up a second routing table.

A quick Google search turned up this article about setting it up.

Good luck.
Dave

 

[Trenix25]

You are using private local IPv4 networks. If you want to pass traffic between them you will need to set up port forwarding for incoming traffic and Network Address Translation for all traffic.

This post shows how to set up Network Address Translation, and some forwarding.

(Answered) How do I use nftables to create a firewall in Linux and forward packets between private networks? | Linux.org

Signed,

Matthew Campbell

 

[alamb200]

Hi,
Stupid as it sounds, I disabled the NIC in VMWare and re-enabled it and it has started working now.
Thanks for your help with this.
alamb200

 

[dos2unix]

the NIC in VMWare

It would have been helpful to know this was a VMware VM in the OP.

 

[alamb200]

Sorry. I didn't realise it would have had an impact.