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Loopback on WAG54G

Discussion in 'Other Linksys Equipment' started by Zinc, Jan 25, 2005.

  1. Zinc

    Zinc Network Guru Member

    Hi all,

    I am looking to buy an ADSL/Wireless router and the WAG54G has caught my eye. Specifically, can someone confirm that the WAG54G supports the 'loopback' feature; where I can access my web server (on the LAN) through the router's WAN IP from a LAN PC (if you see what I mean ;-)).

    Many other products I've come across do not support this, but I've heard that the LinkSys ones do.

    Thanks in advance.

  2. Morpheus

    Morpheus Network Guru Member

  3. Zinc

    Zinc Network Guru Member

    Thanks for the link, it's handy to be able to try out the web interface.

    Regarding the loopback query, AFAIK it's not something that requires a setting in the admin pages. Basically it's a feature that is transparent to the user.

    A bit of background, I tried out a netgear router that exhibited this behaviour (it didn't support loopback);

    1 - I set my domain name to the IP assigned to the WAN on the router
    2 - I forwarded any HTTP requests [on port 80] to a web server machine with a static IP on my LAN
    3 - Accessing the website (using the domain name/WAN IP) is possible from a machine outside the network
    4 - Accessing the website (using the domain name/WAN IP) is not possible from a machine on my network (it would display the routers admin interface)

    If the router DID support loopback it would display the proper website no matter which machine (WAN or LAN) I browse it from. It would need to route from the LAN to the WAN and back to the LAN, hence loopback

    A better explaination of 'loopback' is here. And whilst you can get around it by modifying the HOSTS file (on each LAN PC), I've got too many LAN machines and serve too many websites on domains/sub-domains to use this quick and dirty workaround.

    I've heard that most of LinkSys' routers do support loopback, I would just like a confirmation from someone that uses the WAG54G.

    Thanks again,

  4. Uso

    Uso Network Guru Member

    I just tried on my machine. I don't think it does support the loopback u r talking about. Unless it's not a default setting and needs to be configured somewhere.
  5. Zinc

    Zinc Network Guru Member

    :cry: Oh well thanks for the reply.

    Can anyone recommend a similar ADSL wireless router that does support NAT loopback?


  6. Toxic

    Toxic Administrator Staff Member

  7. memphis

    memphis Network Guru Member

    I use my WAG54G and loopback works for me. I have a dynamic dns address, memphis.kicks-ass.org.

    I have my WAG54G setup to forward port 80 TCP to a webserver on my lan.

    From any pc in my network I can access my webserver directly via, servers private lan IP, shared internet IP or via memphis.kicks-ass.org(which points to my WAG54G's internet IP.)

    So in short. Yes loopback does work on the WAG54G.

    I would not however recommend to anyone that they buy this unit as it seems to have more bugs than working features. Atleast according to what most people have written about it.

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