Proxy Unable to connect to the server

[kylo]

Greetings all

Little bit of background
I have a Zabbix server hosted in AWS with a security group that allows 10051 traffic and internal ip 192.x.x.x with internet breakout.
I have a Zabbix proxy in office running on a VPN that allows me to connect to my AWS resources with internal ip 10.x.x.x.
From the proxy I can telnet to my server on 10051 and I receive the standard connected to .... message
So as far as I can tell my proxy can send traffic to the server which it should

Tailing the proxy logs I get the following:

Unable to connect to the server [servername] :10051 [cannot connect to [[ servername ]]:10051]: [4] Interrupted system call]
Still unable to connect...
Unable to connect to the server [servername] :10051 [cannot connect to [[ servername ]]:10051]: [4] Interrupted system call]
Still unable to connect...

In my proxy.conf I have the following set:

ProxyMode=0
Server=servername
ServerPort=10051
Hostname=myproxyhostname
SourceIP=the ip of my zabbix proxy 10.x.x.x


On the Zabbix Frontend

My proxy is set to Active
I have set the name to myproxyhostname (the same as in my proxy config)
And the IP as the same as my source IP

I am honestly at a loss here, AFAIK and see everything is setup correctly. From my understanding the proxy is there to act as a "gateway" to send traffic to your zabbix server so its only necessary for my proxy to be able to connect to my server

Any thoughts or ideas would be welcomed

Please let me know if you require any further information

regards
K

[storyteller]

On what os runs the server and proxy. Do you have selinux active? If yes, you try to disable selinux?

[kylo]

Server runs on amazon linux2 and proxy runs on ubuntu. SELinux is disabled, No iptables set. Ill continue troubleshooting and post any findings

getenforce
Disabled

[tech.rss]

Check this.
Open this file then comment out debug option & increase 5 then save and restart zabbix server.
vi /etc/zabbix/zabbix_server.conf
DebugLevel=5

then check server log using below command
tail -f /var/log/zabbix/zabbix_server.log

This is for ubuntu if another os so find this log file.

[storyteller]

Now i see, at Server= you need the zabbix server ip or hostname. In my installation SourceIP is commented.

[kylo]

Right I have specified my zabbix server hostname as the "Server=" and I am able to resolve the hostname of the server!
in my case:
Server=zabbixserver
I can telnet zabbixserver 10051, I have ICMP disabled so I wont get a result back when I ping, but when I run "ping zabbixserver" I get the PING zabbixserver (x.x.x.x): 56 data bytes reply

I will try changing the "Server" to use both hostname and IP

[kylo]

Changed Server from using a hostname to IP, I am disabling and re-enabling my proxy on the zabbix server every time I make changes

In logs I get:
Still unable to connect:
Unable to connect to the server [x.x.x.x]:10051 [cannot connect to [[x.x.x.x]:10051]: [4] Interrupted system call]
I have opened the connect from the server to allow ALL traffic from the proxy so I get a reply from the Server when I ping now, something else is up will dig deeper

[storyteller]

telnet to x.x.x.x:10051 works?

[kylo]

Yeah telnet works

[tech.rss]

Must be like as below config

This is for server config file
vi /etc/zabbix/zabbix_server.conf
DBName=zabbix_db
DBUser=zabbix_db_user
DBPassword=zabbix_db_user_password

This is for agent config file
vi /etc/zabbix/zabbix_agentd.conf
Server=zabbix_server_ip_address
ServerActive=zabbix_server_ip_address
Hostname=zabbix_server_host_name

Then restart zabbix server service & agent

Thanks.

[kylo]

Greetings all

I managed to sort out my problem was a bit of a doh moment!

On the Zabbix Server > Administration > Proxies
I changed my proxy to passive mode and for the ip i configured it as : 127.0.0.1 and it started checking in

thanks all for the help