Dynamic DNS (ddns) allows for remote access to publicly hosted server with dynamic IP address, using a pre-defined URL.
I am covering two dynamic DNS providers offering free services, and how to setup their ddns clients respectively:
1. No-IP
No-IP comes with its own linux ddns client, which can be installed using "apt-get noip2".
To manually setup your details, run noip2 with the "-C" option.
root@web-host:# noip2 -h
USAGE: noip2 [ -C [ -F][ -Y][ -U #min]
[ -u username][ -p password][ -x progname]]
[ -c file][ -d][ -D pid][ -i addr][ -S][ -M][ -h]
Version Linux-2.1.9
Options: -C create configuration data
-F force NAT off
-Y select all hosts/groups
-U minutes set update interval
-u username use supplied username
-p password use supplied password
-x executable use supplied executable
-c config_file use alternate data path
-d increase debug verbosity
-D processID toggle debug flag for PID
-i IPaddress use supplied address
-I interface use supplied interface
-S show configuration data
-M permit multiple instances
-K processID terminate instance PID
-z activate shm dump code
-h help (this text)
Note: the /usr/local/etc/noip2.conf returns some seemly encrypted text, so it's not meant to be changed.
2. DNSdynamic
DNSdynamic service uses ddclient in ubuntu. Herewith my configuration for reference:
root@ubuntu:#
cat /etc/ddclient.conf
# Configuration file
for ddclient generated by debconf
#
# /etc/ddclient.conf
daemon=60
protocol=dyndns2
use=web,
web=checkip.dyndns.org
server=www.dnsdynamic.org
login= (username)
password=
(domain).dnsdynamic.com
Replace the corresponding fields with your own account details.
P.S. Remember to set up port forwarding if your servers are sitting behind NAT.
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