Hello,
we recently installed an agent on a Debian system but it seems like the socket on port 6556 is not created properly. Any help on solving the problem is appreciated.
The system
Installing the agent-package
Validating installation and services
Via netstat there doesnt seen to be a socket corresponding to the agent services
Connection-teset with telnet also fails
Units are loaded, active and running
Iptables rules are set (also tried with flushed ruleset, but same effect)
no whitelist feature as far as i know
i also added the desired server-ip as source to iptables
iptables -A INPUT -p tcp -s www.xxx.yyy.zzz --dport 6556 -j ACCEPT
Personally, I haven’t run into this issue. If you have a cmk-agent-ctl-daemon though, can it be, that you’re using the 2.1 beta, which seems to require TLS for some things? There was someone with a similar problem, who needed to touch a file to get the socket to “exist”. Please see this comment: Agent lauscht nicht an Port 6556 systemd - #9 by gulaschcowboy
The post is in German, but the relevant part - if I understood correctly - was to touch /var/lib/cmk-agent/allow-legacy-pull if one isn’t using, or doesn’t want to use TLS.
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