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Tamsco
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Joined: 04 Aug 2004
Posts: 313
Location: dmse.mit.edu
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 Posted: Tue Jan 10, 2006 8:56 am Post subject: Setting Up Name Resolution for SSH (solved for now) |
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This should hopefully be a quick and easy question. I've looked and looked but can't find much in the way of good documentation for SSH. Everything seems to be "How to login to our SSH server". Anyways I have two linux machines separated by 2600 miles. I can ssh into each by typing but since these IPs are not static and since one computer is hooked through a router I worry that one IP may change leaving me high and dry.
I would greatly prefer to login via a command like this
| Code: | | ssh mycomputershostname.whatever |
The only way I know how to do this is to add an entry into /etc/hosts, which I did, but that inevitably requires me knowing the IP of the remote host. Supposing one of the computer's IP address changes is there a way I could still be able to login without calling my parents and having them tell me the IP? Do I need to setup a DNS server?
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Last edited by Tamsco on Thu Jan 12, 2006 6:24 am; edited 1 time in total |
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think4urs11
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Joined: 25 Jun 2003
Posts: 6659
Location: above the cloud
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| Posted: Tue Jan 10, 2006 9:04 am Post subject: |
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Easiest solution would be to install some sort of dynamic dns client on the machine the ssh server runs on - e.g. net-dns/ddclient
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Tamsco
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Joined: 04 Aug 2004
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Location: dmse.mit.edu
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| Posted: Wed Jan 11, 2006 6:12 pm Post subject: |
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Actually I've been thinking about this a little more. Suppose I did put a DNS server on my west coast computer, wouldn't I have to write down it's IP in a conf file as to make my east coast computer recognize it as a DNS server? If so that defeats the whole purpose. It would seem that I need to have DNS resolution from a static IP. In my setup the only things that have static IPs are DHCP servers beyond my cojntrol?
Any other ideas or am I going to have to call my parents if and when ssh ceases to work?
Here's My Setup:
East Coast:
[Internet] ------- [MIT DHCP Server] --------[My Computer]
West Coast
[Internet] ---- [Cable Company DHCP] ------ [Router] ------[My Other Computer]
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think4urs11
Bodhisattva
Joined: 25 Jun 2003
Posts: 6659
Location: above the cloud
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| Posted: Wed Jan 11, 2006 9:01 pm Post subject: |
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as i said before, install an ddns client on your parents pc.
It will update its dns record everytime the machine is started and by default checks whether the relation dnsname <-> ip address are still valid every 5 minutes (and updates the record if neccessary).
This is done by having the ddns client to connect to it ddns provider (e.g. DynDNS.com) so the name you register will always resolve to the ip address your parents machine is visible in the internet.
see  http://gentoo-wiki.com/HOWTO_Dynamic_DNS
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Tamsco
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| Posted: Thu Jan 12, 2006 6:24 am Post subject: |
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Ahhh, that makes sense, thanks. I'll do that over the weekend.
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