i wanted to make it functional first then run as is should be, and at it was at first (permissive SElinux, logged as user).
If it were a firewall issue on the AS400, then i shouldn't be able to run a snmpget command from another box that had, temporally, the same IP of my nagios box ? am i right ?
Well as i said, when i tryed with my windows box, it's work !
AS400 IP: 10.84.1.11/22
original Nagios IP: 10.84.1.39/22
Windows box IP: 10.84.3.232/22
2-change windows box from 10.84.3.232/22 to 10.84.1.39/22
3-run the following command from my windows box and get a result:
snmpget -r:10.84.1.11 -t:1 -v:1 -c:public -o:.220.127.116.11.18.104.22.168.1.8.2
4-change back windows box to original from 10.84.1.39/22 to 10.84.3.232/22
5-start my nagios box, run again the command and get this result:
/usr/bin/snmpget -c public -t 5 -v 1 10.84.1.11:161 .22.214.171.124.126.96.36.199.1.8.2
Timeout: No Response from 10.84.1.11:161.
I will test today with 2 other distro (Fedora and Debian) from the same LAN.