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KUppiano
Karl Uppiano

join:2003-02-02
Ferndale, WA

[DSL] Netgear 7550 Hairpinning?

I just received a new Netgear 7550 modem/router to go with my DSL speed upgrade. I got all my port forwarding and dynDNS updates working, but I cannot seem to connect to the dynDNS domain name from inside the LAN, nor can I ping the WAN interface via the dnyDNS domain name.

This is called "hairpinning", and I have been able to do this with every other router I have had. Essentially, the router needs to be able to route to its own public IP. Am I just not using it right?


Hank
Searching for a new Frontier
Premium
join:2002-05-21
Burlington, WV
kudos:3
Maybe this will have some information of benefit to you.

»seansite.dyndns.org/frontierfaq/···nt/7550/

Aranarth

join:2011-11-04
Stanwood, MI
reply to KUppiano
Are you sure you have the external ip address?

I noticed that during the first month I got a new ip address almost daily, lately it is has been stable and only changing every month or every other month.

KUppiano
Karl Uppiano

join:2003-02-02
Ferndale, WA
reply to Hank
Thank you. The information is helpful, but it does not answer the hairpinning question.

KUppiano
Karl Uppiano

join:2003-02-02
Ferndale, WA
reply to Aranarth
My dynDNS client gets the external address from the router and updates dynDNS regularly -- that part is working. I can contact my little server from work. But I can't from inside the LAN using the WAN address.

This is a problem because now I need separate scripts and shortcuts on my laptop for "inside" and "outside" the LAN; i.e., "work" and "home". It isn't insurmountable, but it is annoying and time-wasting.

gozer
Premium
join:2010-08-09
Rochester, NY
reply to KUppiano
Just for nuts try going through a proxy for your laptop Opera browser does this by default.


wayjac
Premium,MVM
join:2001-12-22
Indy
kudos:1
reply to KUppiano
There are routers that support "hairpinning" aka loopback and there are routers that do not support hairpinning.
The 7550 does not support hairpinning.

KUppiano
Karl Uppiano

join:2003-02-02
Ferndale, WA
reply to gozer
said by wayjac:

There are routers that support "hairpinning" aka loopback and there are routers that do not support hairpinning.
The 7550 does not support hairpinning.

You say that with such conviction, I almost hesitate to ask: do you know for certain if there is absolutely no advanced configuration that could be set, for example adding a rule to the routing table to accomplish this?