How to Access Nagios portal Via SSH Tunneling

In enterprise networks generally servers access is provided through a proxy server. Sometimes one has to pass through many server logins to access the required host. This note shows how to use SSH tunneling feature to forward nagios portal (HHTP) port to local system by using multiple ssh logins.

If a user has access to Nagios portal of Server D after logging in to Server A to Server B to Server C then follow the below method to have Server D portal access on local windows system

1. From windows system ssh to Server A by using Putty client

2. From Server A ssh to Server B by issuing below ssh command

   ssh <Server B IP> -L 8091:localhost:8091

3. From Server B ssh to Server C by issuing below ssh command

   ssh <Server C IP> -L 8091:localhost:8091

4. From Server C ssh to Server D by issuing below ssh command

   ssh <Server D IP> -L 8091:localhost:80

5. Now right click on putty window select "Change Setting", Goto Connection->SSH->Tunnels dialog and mention 8091 in Source Port, localhost:8091 in Destination text boxes, click on Add

6. Now access Server D Nagios portal  on local system on http://localhost:8091 url

Note: TCP port 8091 should be free on Server A, B, C and Windows system