Re: lwl servers

> Hmmm, I was just thinking, how hard would be to create a web site based lwl for general users
> which would depend on something like .cgi for querying for ip address, then setting up a file for
> users to see as a new page?

Could be fairly trivial. However, the problem is what to do with
timeouting of the information; either it would clog the list if it would
linger forever, or it would have to be periodically refreshed.

> True, the lwl facilities within speakfreely would be no longer benefitial, but atleast an external
> way would be available.

Can anyone tell me in brief how exactly LWL works, including the packet
format, or will it have to wait until I have time to read the source?

> I don't quite know the bandwidth requirements of such a script and pages being called, and the
> possibilities of that working under nat either.

Not much on its own. Negligible for one user and sane refresh times (15
minutes?). Could be a lot in case of summing this for couple thousands
users.

However, can't we use a different trick? Could a kind of dynamic DNS
server work? A lot of informations can be put into eg. a TXT record. The
system could work similar to a cross of a realtime-blackhole DNS service
with dynamic DNS and reverse DNS lookup; an address of the format
user.identification.reversednsdomain.com could resolve to its current IP
and its corresponding TXT record could contain additional information.
Like eg. TXT records of 4.3.2.1.bl.spamcop.net (where 1.2.3.4 is spammer's
IP address) do.

But I think Jabber would be better way to go, as there is a lot of various
issues (authentication, presence notification, etc.) that are already
solved there, and connections from the client to the server are always
outgoing from the client, so there is no problem with NAT in between.

> Suspect cgi or even php or perhaps jaba script would even do for this.
> If the latter, it would be saving work on the server for the processing.

There is a simple PHP script that tells you your IP address. Check
http://lwl.b2b-phone.com/myip.php

> Then again, I am just throwing out ideas.
> You are the network experts.

Ideas are good.:)

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