[Ilugc] remotely accessing a machine on a lan with dynamic IP
- From: girishvenkatachalam@xxxxxxxxx (Girish Venkatachalam)
- Date: Wed, 8 Feb 2012 20:39:11 +0530
On Wed, Feb 8, 2012 at 3:54 PM, kenneth gonsalves
<lawgon at thenilgiris.com> wrote:
hi,
I maintain a server in a remote place. It is connected to a LAN - the
LAN is the usual poor man's LAN which uses the BSNL router as the dhcp
server. They have dynamic IP from bsnl. The machine the machine has a
fixed IP (192.168.1.123). The inward facing IP of the router is
192.168.1.1. Is it possible to ssh into this machine from outside, and
if so how?
--
An extremely popular thread!
Great going!
I always run a perl script from the dyndns.org site that updates the IP
whenever it changes.
You have to tweak it a bit everytime you have a different MODEM.
Basically all it does is figure out its own IP using the same method as
http://www.checkmyip.com
which is nothing but a simple CGI that prints the env var
REMOTE_ADDR
Anyway other than port forwarding there is one more technique which
is quite excellent as there is no need to do any port forwarding but
it is complex to get working and it requires the machine to be always
up and requires a third machine with a public IP.
With all these needs I call it excellent since it kind of breaks
firewalls and is quite interesting both from a crypto angle and from a
networking angle.
Anyway I am not going to dwell upon this because if you search last
year's or the previous year's posts I have sent a ssh port forwarding
technique mail.
Look at that and you will know what to do.
-Girish
--
G3 Tech
Networking appliance company
web:
http://g3tech.in ?mail: girish at g3tech.in
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