UDP Port 161
hi guys
My linux server have SNMP configure port by default is 161 (UDP) now my monitor team - who are using Nagios - say the server are not being monitor so check netstat -lnu and I see all is OK and snmp service is running fine what else should I check about this port 161? to see if it is really opened and listening? thanks a lot |
Try running snmpwalk on that server to make sure that you
get a response. If that works, try running snmpwalk on the nagios server. If it doesn't work on the nagios server, run iptables -nL to see if the port is being blocked. Also check the configuration of the snmp service, since it may only send responses to select addresses. |
Quote:
Code:
Active Internet connections (only servers) |
Quote:
and yes the snmp is configured to send to specified IP |
Quote:
Quote:
|
Quote:
Code:
Chain INPUT (policy ACCEPT) I mean it was working OK and suddenly 6 servers Stopped working |
Quote:
One might fail...six don't, unless something changes further downstream, like a router/firewall in between those six and the monitoring server. |
Quote:
yeah I told them the same thing before posting here 1 server is OK but 6 having the same issue I told them the only thing shared by all of them is network.. but my networking team is so dump.... yeah it was a networking issue thanks a lot |
Quote:
|
All times are GMT -5. The time now is 11:59 PM. |