[Zabbix 3.4 - Ubuntu] SNMP traps not logging

[kasik]

Hi guys,
i have a problem with SNMP traps to get them into tmp log and into zabbix.
I set it up as in documentation using snmptt without perl. and even when i have set log file to be /tmp/zabbix_traps.tmp in zabbix_server conf and in snmptt too i just don't get any but when i send test trap from monitored server with tcpdump -i xxx port 162 i can see that i recieve it... Any idea where is the problem? i even checked if services is running and modified chmod on log file to 777... please help

[kasik]

update

any ideas ?

[kasik]

Resolved

So i found solution with this command:
snmptrapd -A -Lf /tmp/snmptrapd.log

and it showed me this:
NET-SNMP version 5.7.3 AgentX subagent connected
couldn't open udp:162 -- errno 98 ("Address already in use")

so i reconfigures snmpd.conf where i changed used ports and restarted service
then again used first command and in log i saw its connected so i send traps and now they are in tmp log :-)

[Gege]

same symptom, same methos, other reason

Thank you, Kasik for this post. I had the same problem of not receiving any trap.
I used the same command

snmptrapd -A -Lf /tmp/snmptrapd.log

and found in snmptrapd.log that snmptrapd would not receive any trap as long as there would not be an access method defined in snmptrapd.conf. So I opted for the fast method and decided to removed the access method by inserting:

disableAuthorization yes

in snmptrapd.conf

I now receive everything,

following zabbix documentation I attempted to test the configuration using zabbix_sender, but it was not part of the initial installation. It was not either installed by zabbix-agent installation. the right way to do it is

apt-get install zabbix-sender (with a - not a _)