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Full Discussion: How to get IP of computer assigned by DHCP?
Special Forums IP Networking How to get IP of computer assigned by DHCP? Post 302883530 by corrado33 on Wednesday 15th of January 2014 11:34:06 AM
Old 01-15-2014
I think if I "ssh 'hostname" that might work. I guess I could check through the vpn.

For those of you confused here is what's going on.

I have a Mac desktop that I use for my day to day work. Sometimes I want to ssh into it from my iPad over wifi to do some data analysis, so I have an ssh server running. Just the standard ssh server that ships with os X, nothing special. Only I have permission etc.

However, the intranet at work is DHCP based. I cannot request a static IP because it costs money (stupid I know.)

Sometimes I forget to grab my IP before I leave the office, so if I want to ssh into the computer I can't, because of DHCP. So my original question was what is the best way to get that IP if I am not currently in front of the computer.

I did not know you could use the hostname of a computer as the address essentially. As I stated before, I'm terrible at networking.

With that said, it iSSH on the ipad does not like using the hostname over a VPN (I'm testing it from home currently), but using the IP works perfectly.

Putty on XP says "host does not exist" when connected through the VPN even when I copy and paste the hostname from the result of the "hostname" command. Putting the IP into putty works just fine.

---------- Post updated 01-15-14 at 12:34 PM ---------- Previous update was 01-14-14 at 10:08 PM ----------

Sorry for the double post, I thinking I found some more hints about my problem.

My ip when I'm on the wireless network is aaa.bbb.100.### and the ip of the server is aaa.bbb.185.### where aaa and bbb are the same. So, in my limited knowledge of networking, I'd say that whenever I feed my ipad a hostname to try to connect to, it doesn't know where it is because it's on a slightly different network, but when I give it an ip, the ipad knows exactly where to look for the computer to find it.

I think I may be able to fix it by adding another DNS server in my network settings? But I don't know what to put. Or it has something to do with the hostname. The hostname I am using is something-computer.local. Can the .local be changed to tell the ipad to look somewhere else?
Last edited by corrado33; 01-14-2014 at 10:18 PM..
 

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LEARN ABOUT ULTRIX

ssh-argv0

SSH-ARGV0(1)						    BSD General Commands Manual 					      SSH-ARGV0(1)

NAME

     ssh-argv0 -- replaces the old ssh command-name as hostname handling

SYNOPSIS

     hostname | user@hostname [-l login_name] [command]

     hostname | user@hostname [-afgknqstvxACNTX1246] [-b bind_address] [-c cipher_spec] [-e escape_char] [-i identity_file] [-l login_name]
     [-m mac_spec] [-o option] [-p port] [-F configfile] [-L port:host:hostport] [-R port:host:hostport] [-D port] [command]

DESCRIPTION

     ssh-argv0 replaces the old ssh command-name as hostname handling.	If you link to this script with a hostname then executing the link is
     equivalent to having executed ssh with that hostname as an argument.  All other arguments are passed to ssh and will be processed normally.

OPTIONS

     See ssh(1).

FILES

     See ssh(1).

AUTHORS

     OpenSSH is a derivative of the original and free ssh 1.2.12 release by Tatu Ylonen.  Aaron Campbell, Bob Beck, Markus Friedl, Niels Provos,
     Theo de Raadt and Dug Song removed many bugs, re-added newer features and created OpenSSH.  Markus Friedl contributed the support for SSH
     protocol versions 1.5 and 2.0.  Jonathan Amery wrote this ssh-argv0 script and the associated documentation.

SEE ALSO

     ssh(1)

Debian Project							 September 7, 2001						    Debian Project
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