Help with Ubuntu Firewall

[HaveDill]

SOLVED
Sorry everyone, it was a typo on my part, i put my machines IP as a hostname and the GT-105-213 as the visible name -.- I feel stupid.

I'm going to leave this post up for now, as some of the firewall info/telnet info may help others to diagnose their own problems. Mods, feel free to delete if you so choose.
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Hey all,

I've just built a brand new setup of Zabbix on a HP G8 dl360, with 2 SSD's in RAID1. After verifying with a prebuilt version that Zabbix can satisfy many of my needs.

It's running Ubuntu 14.04, and i have everything setup properly / the same as the precompiled version I had used.

My hostname in the frontend is the EXACT same as my machine, GT-105-213

Previously, when i got this error:

5592:20140930:123335.249 no active checks on server [192.168.105.248:10051]: host [GT-105-213] not found

I discovered i had to open the firewall like this:

SuSEfirewall2 open EXT TCP zabbix-trapper zabbix-agent
Then reload the firewall rules:

SuSEfirewall2 stop
SuSEfirewall2 start

However with Ubuntu, i've completely disabled the firewall

sudo ufw disable

But i still get that error in my agent logs.

I am also able to telnet to my server from my machine, pointing to 192.168.105.248 10051 AND 10050. I can telnet from my server to my machine via telnet 192.168.105.213 10050, but not via 10051.

zabbix@Zabbix:~$ telnet 192.168.105.213 10051
Trying 192.168.105.213...
telnet: Unable to connect to remote host: Connection refused
zabbix@Zabbix:~$ telnet 192.168.105.213 10050
Trying 192.168.105.213...
Connected to 192.168.105.213.
Escape character is '^]'.
Connection closed by foreign host.

Can anyone give me a hand? I know it's nothing with the agent, because these configs all worked perfectly before hand. Seems to just be something with Ubuntu firewall.