¹ Public IP address is the default, private addresses can also be used. Inadyn can maintain multiple host records with the same IP address, use a combination of a script, the address from an Internet-facing interface, or default to using the IP address change detector of the DDNS provider. The DDNS client updates your DNS record periodically and/or on demand when your IP address changes. If you want to run an Internet server on such a connection you risk losing your IP address every time you reconnect, or as in the case of DHCP even when the lease is renegotiated.īy using a DDNS client like inadyn you can register an Internet name with a DDNS provider, like FreeDNS. Protocols like DHCP, PPPoE, or PPPoA are used to give you an address and a way to connect to the Internet, but usually not a way for others to connect to you. Most people are unaware they share a pool of Internet addresses with other users of the same Internet Service Provider (ISP). It can also be used in installations with redundant (backup) connections to the Internet. Commonly available in many GNU/Linux distributions, used in off the shelf routers and Internet gateways to automate the task of keeping your Internet name in sync with your public¹ IP address. Inadyn, or In-a-Dyn, is a small and simple Dynamic DNS, DDNS, client with HTTPS support. Logger -t publicIP 'Not updating.The latest release is always available from GitHub at Reason: $reason'ĮXPIRE|FAIL|TIMEOUT|PREINIT|REBOOT|STOP|RELEASE|*) MEDIUM|ARPCHECK|ARPSEND|NBI|BOUND|RENEW|REBIND) usr/sbin/inadyn -iterations 1 -u $username -p $password -a $domain Logger -t publicIP 'Updating ip for domain $domain with username $username' Logger -t publicIP 'Public IP is $actual_ip' NETSTATUS=`wget -O - 2>&1 | grep 'Network is unreachable'` # logger -t publicIP “The network is DOWN.” # FILE: dhcp3/dhclient-exit-hooks.d/zzz_public_ipĭns_ip=`host '$domain' |sed -e 's/* //'`Īctual_ip=`wget -q -O - |sed -e 's/.*Current IP Address: //' -e 's/&1` in It uses dhcp to know when ip has been updated. The problem with this solution is that inadyn does not detect if network is up, and sometimes it updates too much times and server disables your dynamic dns account.
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