Unable recieve detail from source

[lingweican]

Hi all,
Currently i have nagiosNA setup in our system.
There one source until now still unable to receieve anything maybe due to different subnet?
Is anyone having this issue ?

[Box293]

Have you opened the ports on the NA server firewall (iptables) to allow the inbound traffic?

If the data is coming from a different subnet then it must traverse routers/firewalls, have you opened the ports to allow this traffic through to the NA server?

[lingweican]

Is a different subnet. But is a direct connection. in the IPtables source anywhere destination anywhere 9920 is accept
sorry not good in linux

[Box293]

Lets see if the traffic is hitting the NA server.

First install tcpdump:

Code: Select all

yum -y install tcpdump

Then run this command:

Code: Select all

tcpdump udp port 9920

9920 is the port you have defined on your source in Network Analyzer AND on the sending device.

[lingweican]

i yum install already. but when i do the command tcpdump udp port 9920 it seem like struck there not moving at all.

[Box293]

but when i do the command tcpdump udp port 9920 it seem like struck there not moving at all.

If the data is coming from a different subnet then it must traverse routers/firewalls, have you opened the ports to allow this traffic through to the NA server?

Is a different subnet.

If it's in a different subnet, then it must pass through a router. Is that router allowing udp port 9920 from the source to reach the Network Analyzer server?