Issue with connecting to Vnc via router

[James Weatherall]

Christopher,

Thanks for the extra information.  Overall, it sounds like there is a mixed
bag of router behaviours out there, and that this is one problem that Scott
is well-justified in wanting to describe.

Cheers,

Wez @ RealVNC Ltd.
 

> -----Original Message-----
> From: vnc-list-admin "at" realvnc.com 
> [mailto:vnc-list-admin "at" realvnc.com] On Behalf Of Christopher Mc Carthy
> Sent: 02 December 2004 13:09
> To: vnc-list "at" realvnc.com
> Subject: RE: Re: Issue with connecting to Vnc via router
> 
> Older Alcatel modem-routers (I'm certain of SpeedTouch Pro, 
> SpeedTouch with Firewall and the 510v3 models) have this 
> problem (impossible to access XXXX.myserver.org from the LAN side).
> 
> As there are an awful lot of these Alcatel modem-routers out 
> there (much of Europe - France, Belgium, UK etc etc -, the 
> US, Israel, New Zealand
> etc) I think this potential *problem* should be in the FAQ-O-Matic.
> 
> As I use firmware debugged and improved by a bunch of French 
> hackers, I do not have this problem with my Alcatel modem-router :)
> 
> HTH
> 
> -----Original Message-----
> Date: Wed, 1 Dec 2004 18:39:27 +0000 (GMT)
> From: "Scott C. Best" <sbest "at" best.com>
> To: vnc-list "at" realvnc.com
> Subject: Re: Issue with connecting to Vnc via router.
> 
> Wez:
> 
>   	I'm sorry to disagree, but my experience has been that 
> most commercial NAT'ing routers (eg, LinkSys, Netgear) are 
> unable to route traffic in a "loop" manner as described. 
> Perhaps the very latest products allow this, or perhaps I 
> could simply be wrong:
> if other users on this list have routers which allow this, 
> please feel free to let me know and I'll update the 
> FAQ-O-Matic entries about this topic accordingly.
> 
>   	I also agree that the configuration interface should 
> only appear on the internal interface, but most of the 
> commercial routers I've worked with have a radio-button 
> option to enable the external side as well.
> 
> cheers,
> Scott
> 
> 
> > On Dec 1, 2004, at 2:49 AM, James Weatherall wrote:
> > 
> >> Scott,
> >> 
> >> Unless there is something wrong with LAN's access to the Internet,
> your
> >> statement regarding access to servers is incorrect.  The router
> should
> >> respond on its external (WAN/Internet) IP address even within the
> LAN.
> >> 
> >> Your statement regarding "router logon box"s is also incorrect, I
> think.
> >> Routers should only serve their configuration interface 
> (assuming it
> is HTTP
> >> based), on their LAN address, and not via their WAN address.
> >> 
> >> So, to clarify:
> >> 
> >> - XXXX.myserver.org should work from both the Internet and the LAN.
> >> - You should only see the router's configuration pages if 
> you browse
> to its
> >> LAN address (probably 192.168.0.1 or similar).
> >> 
> >> It sounds as though the routers discussed here are broken in that
> they
> >> regard traffic for their WAN address as equivalent to traffic for
> their LAN
> >> address, when received on the LAN interface.
> >> 
> >> Regards,
> >> 
> >> Wez @ RealVNC Ltd.
> 
> 
> 
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