User Script runs... but doesn't?

[Dulanic]

I am attempting to route traffic to a specific IP to a local network IP due to loopback issues with my ISP's device. I have researched some and this command when run on the router seems to correct my issue:

iptables -t nat -A PREROUTING -p tcp -d 123.123.123.123 -j DNAT --to 192.168.2.155

So to run this automatically I telnet into the router and went to /jffs/scripts and created a file for nat-start and it does run per the log. It is also enabled in the Admin/System tab.

Jul 31 19:00:14 custom script: Running /jffs/scripts/nat-start

This is my script and it's permissions. I've also tried adding sleep to it to delay it some?

#!/bin/sh
sleep 30
iptables -t nat -A PREROUTING -p tcp -d 123.123.123.123 -j DNAT --to 192.168.2.155

-rwxrwxrwx    1 me root           103 Nov 19 19:48 nat-start
-rwxrwxrwx    1 me root           103 Nov 19 19:53 services-start

It works if I run ./nat-start and traffic is properly routed so I assume it's not a script problem... maybe it's a timing issue? But if thats the case, I would think the sleep would fix it?

 

[john9527]

How did you create the script? If you didn't use vi or nano on the router, telnet/ssh to the router and run

dos2unix /jffs/scripts/nat-start

 

[Dulanic]

I did it /w vi.

 

[john9527]

Try inserting the rule instead of adding it.....

-I PREROUTING instead of -A PREROUTING

 

[Dulanic]

Same result, works if I run the script manually but no change on boot even though it runs...

Jul 31 19:00:14 custom script: Running /jffs/scripts/nat-start

 

[john9527]

After boot, run

iptables -t nat -nvL PREROUTING

Do you see the rule?

 

[Dulanic]

OK so not sure what fixed it... I still had sleep in there and I removed that to be sure that wasn't the problem but I also had a extra line before sleep. Removed both and it worked this time /w -I so maybe it was the -I maybe it was the sleep maybe it was the extra line.. not sure. But it worked this reboot!

Thanks!

 

[john9527]

Thanks!

Gotta watch out for those router gremlins Glad you got it working.