Cacti monitoring centos packet capture unreachable-Admin prohibited

 
09:10:41.023399IP192.168.1.80>192.168.2.182: ICMP Host192.168.1.80Unreachable-Admin prohibited, Length79
 

This always occurs when a packet is captured, and it is behind getrequest.

Enable iptables configuration:

The configuration statement found online at the beginning is,

 
-A input-p udp-m udp -- Sport161-J accept
 

Later I thought we needed to open TCP and add another one,

-A input-p tcp-M state -- state new-m tcp -- dport161-J accept-A input-p udp-m udp -- Sport161-J accept
 

Finally, we found that UDP is incorrect. Therefore,

 
-A input-p udp-M state -- state new-m udp -- dport161-J accept
 

Capture the packet and you will see that each getrequest is followed by getresponse.

By the way, write down the packet capture command

 
Tcpdump-nn-x'Host 192.168.2.182'-C10