This is my first time trying to work with an ARP so I'm slightly lost as to what I'm missing. I'm probably going down the wrong track, so lemme know if I'm completely and utterly off.
What I'm trying to do: I'm trying to get one of my servers to have a "name" so that I can access it directly from externally. I added a hostname, but that doesn't seem to have done anything
$ hostname
excalibur
I tried doing the arp -a command and I get the following
$ arp -a
existing.host.local (10.xxx.xxx.xxx) at ipv6 [ether] on etho0
? (10.xxx.xxx.xxx) at ipv6 [ether] on etho0
The 2nd line (the one with the ?) is the one I'm trying to get to be external so that it would be called excalibur.host.local I thought a hostname should be able to handle that, but apparently I'm wrong. I've closed off all ports except for port 25, but I assume that shouldn't have anything to do with it?
Does anyone have guidance as to what I need to be working and/or what I should be searching for to look up and learn on how to set things up? I've been looking around, but the issue is I don't really know what I need to be trying to look up so I'm at a complete loss =/ Thanks in advance =)