Multiple DynDns

[tialohitc]

Hi everyone,

I want to use my first zeroshell box (Alix 2D13) with three DSL-Connections (all on ETH1). Each one has a dynamic IP that changes at irregular times.

How can I best set up THREE INDEPENDENT DYNDNS ACCOUNT UPDATES?

Thank you in advance for any ideas and hints!

Thomas

[ppalias]

I had the same problem with 2 dynamic adsl connections. Although I would very much like to see in future releases the ability to have multiple dynamic dns clients, I have temporarily tried the following workaround. There are 2 always-on servers which have a dyndns client running. These 2 servers are forwarded to a different gateway with a netbalancer rule. As a result one dyndns client updates the first account and the other client the second account.

[tialohitc]

Hi ppalias,

Yes, that would work. But unfortunately not with my setup…

Could it be achieved with a script, cronjob, etc? Doesn’t have to be a gui-solution…

[Marcelo]

Hi,

This page contains a set of scripts that do the job. I used these scripts for years on the Linksys NSLU2 NAS.

They are well written and, despite written for running on the NSLU2, they are not platform dependent. I have successfully used them on a regular linux box.

Hope it helps as a kickstart for you to write one for the purpose you described (managing multiple dyndns domais). Good luck!

http://www.nslu2-linux.org/wiki/HowTo/DynDNSupdate

Regards,

[Lightyear]

I currently have two dynamic IP connections, one ADSL and one 3G.
Ivan Baldo, fine programmer and friend extraordinaire, made a script so ZeroShell updates both dynamic IPs.
He called it ddns2.nuestro (we are Spanish speakers) and placed it in the /Database directory.
Then he added the following command to the ZeroShell preboot script:

cp -v /Database/ddns2.nuestro /root/kerbynet.cgi/scripts/ddns2

so ddns2.nuestro is what ZeroShell wil run when updating dynamic IPs.
It has worked without a glitch for more than 3 months now, and I think it is very easy to modify for more than 2 dyndns accounts, or for another DDNS service.
Here it goes:

#!/bin/sh

# Script made by Ivan Baldo to permit multiple dyndns IP updating in ZeroShell

Usuario=”your_dyndns_user_name”
Contrasena=”your_dyndns_password”
Host_PPP0=”http_address_of_dyndns_account_1″
Host_PPP1=”http_address_of_dyndns_account_2″

actualiza ()
{
Interfaz=”$1″
Host=”$2″
IP=$(ifconfig $Interfaz 2>/dev/null | awk ‘NR==2 {print $2}’ | grep ‘.*..*..*..*’ | cut -d: -f2)
touch /tmp/dyndns.ipviej.$Interfaz
IPViej=”$(cat /tmp/dyndns.ipviej.$Interfaz)”
Actualizar=”no”
if [ “$IP” != “” ]; then
if [ “$IP” != “$IPViej” ]; then
Actualizar=”si”
fi
fi
if [ “$Actualizar” = “no” ]; then
return
fi
if [ -e /tmp/dyndns.deshabilitado.$Interfaz ]; then
return
fi
logger -t DDNS “Actualizando $Host a $IP de interfaz $Interfaz.”
if wget “–bind-address=$IP” -t 3 -w 20 -o /tmp/dyndns.error.$Interfaz -O /tmp/dyndns.resultado.$Interfaz
“http://$Usuario:$Contrasena@members.dyndns.org/nic/update?system=dyndns&hostname=$Host&mx=$Host&myip=$IP”
then
logger -t DDNS “==> $(cat /tmp/dyndns.resultado.$Interfaz)”
if grep -q “!yours|notfqdn|abuse|nohost|badagent|badauth|badsys|dnserr|numhost|911|!donator”
/tmp/dyndns.resultado.$Interfaz
then
logger -t DDNS “==> Hubo un error reportado por DynDNS, luego de solucionar el problema borre el archivo /tmp/dyndns.deshabilitado.$Interfaz!”
touch /tmp/dyndns.deshabilitado.$Interfaz
else
echo “$IP” >/tmp/dyndns.ipviej.$Interfaz
fi
else
logger -t DDNS “==> Error al conectarse con DynDNS:”
grep -v ” => ” /tmp/dyndns.error.$Interfaz | logger -t DDNS
fi
}

while true; do
actualiza ppp0 $Host_PPP0
actualiza ppp1 $Host_PPP1
sleep 60
done

Unfortunately, the forum editor does not allow script formatting. I hope it is readable all the same.
I believe also it’s easy to translate the Spanish parts if need be, but in any case I will be following this thread so feel free to ask for translation.

I hope I didn’t break any forum rule copying the script here, but I feel it really can be of help to someone, and I do not have any place to hang it for downloading 🙁 .
ZeroShell rules! 😀

[ppalias]

Hi Lightyear!
This is a very useful script indeed! You can use the

 [ code ] [ / code ] 

tags to make it appear more clearly.
My question is if Ivan could alter the script so that it would accept 2 or more totally different accounts, which means that the http_address_1 has username_1 and password_1 and http_address_2 has username_2 and password_2

[Lightyear]

No need to bother Ivan; here follows the modified script 8)

#!/bin/sh

# Script made by Ivan Baldo to permit multiple dyndns accounts in ZeroShell



Host_PPP0="http_address_of_dyndns_account_1"

Host_PPP1="http_address_of_dyndns_account_2"



actualiza ()

{

Interfaz="$1"

Host="$2"

Usuario="$3"

Contrasena="$4"

IP=$(ifconfig $Interfaz 2>/dev/null | awk 'NR==2 {print $2}' | grep '.*..*..*..*' | cut -d: -f2)

touch /tmp/dyndns.ipviej.$Interfaz

IPViej="$(cat /tmp/dyndns.ipviej.$Interfaz)"

Actualizar="no"

if [ "$IP" != "" ]; then

if [ "$IP" != "$IPViej" ]; then

Actualizar="si"

fi

fi

if [ "$Actualizar" = "no" ]; then

return

fi

if [ -e /tmp/dyndns.deshabilitado.$Interfaz ]; then

return

fi

logger -t DDNS "Actualizando $Host a $IP de interfaz $Interfaz."

if wget "--bind-address=$IP" -t 3 -w 20 -o /tmp/dyndns.error.$Interfaz -O /tmp/dyndns.resultado.$Interfaz 

"http://$Usuario:$Contrasena@members.dyndns.org/nic/update?system=dyndns&hostname=$Host&mx=$Host&myip=$IP"

then

logger -t DDNS "==> $(cat /tmp/dyndns.resultado.$Interfaz)"

if grep -q "!yours|notfqdn|abuse|nohost|badagent|badauth|badsys|dnserr|numhost|911|!donator" 

/tmp/dyndns.resultado.$Interfaz

then

logger -t DDNS "==> Hubo un error reportado por DynDNS, luego de solucionar el problema borre el archivo /tmp/dyndns.deshabilitado.$Interfaz!"

touch /tmp/dyndns.deshabilitado.$Interfaz

else

echo "$IP" >/tmp/dyndns.ipviej.$Interfaz

fi

else

logger -t DDNS "==> Error al conectarse con DynDNS:"

grep -v " => " /tmp/dyndns.error.$Interfaz | logger -t DDNS

fi

}



while true; do

actualiza ppp0 $Host_PPP0 username_1 password_1

actualiza ppp1 $Host_PPP1 username_2 password_2

sleep 60

done 

Of course, to provide for another DDNS service, it would be neccesary to know these other service quirks and tricks.
And thank you for the tip, ppalias! I do hope you have had a very good 2010 beginning.

[ppalias]

Thanks Lightyear! I’ll try it at home later on and let you know. It looks ok however on a first glance.

[Author]

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