Re: NAT through about gnugk

[sgenius sgenius <gn00081389@xxxxxxxxxxxx>]

i mean all EP create a TCP tunnel before RAS for a special purpose(Q931).1000 user create 1000 tcp tunnel only for the purpose to let Q931 work well.

i can use RCF's callSignalAddress to give some information

to EP.so EP can know behind NAT or not.then create a TCP connection

to GK

If EP have not make a call but still need maintain the TCP connection with GK.1000 user that GK need to maintaion 1000 sockfd.
   

i do not know that gnugk already have the function to do the work.
and EP must do something to support GK to do the work

 
 
Zygmuntowicz Michal <m.zygmuntowicz@xxxxxxx> wrote:

What do you mean by "burden" and "fix the gk source code"?
From my experience, eveything works extremly well, if used properly.

----- Original Message -----
From: "sgenius sgenius"
Sent: Saturday, July 10, 2004 3:09 PM


> If i make a fixed TCP connect(NAT behind endpoint to GK)
> Q.931 maybe work well in all type NAT(including symentric).But will make a burden to GK.And i must be fix the GK source code and
write a softphone to communicate with GK about the fixed TCP connection
> Zygmuntowicz Michal wrote:I would add 7:
> 7. Use (Write) a softphone that can work behind NAT/Firewall
> and undestands how to make use of GnuGk NAT traversal.
> You can then use it behind every NAT and (most) firewalls.
>
> ----- Original Message -----
> From: "Stewart Nelson"
> Sent: Friday, July 09, 2004 10:00 PM
> Subject: Re: NAT through about gnugk
>
> > Hi,
> >
> > There are many possible solutions for multiple VoIP users
> > behind the same NAT:
> >
> > 1. For EP2, use a device than can interface several phones
> > with different call signal addresses, e.g. Cisco ATA-186.
> > Set up multiple static mappings, or put in DMZ.
> >
> > 2. For EP2, use a gateway, e.g. Planet VIP-400, that
> > will accept setup on one port, but send the call to
> > the correct phone based on called number.
> >
> > 3. Use endpoints behind NAT2 that allow you to
> > specify ports other than 1720. Configure the NAT
> > to map the various ports to the different EPs.
> >
> > 4. Put another GK, or a switch like Asterisk, behind
> > NAT2.
> >
> > 5. Put your GK, with two network interfaces, around
> > NAT2 (if two public IPs available), or configure the
> > machine to also act as NAT2, if you are restricted to
> > a single IP.
> >
> > 6. Replace NAT2 with one that properly proxies
> > H.323.
> >
> > If you need multiple endpoints behind the same
> > NAT, and have no administrative control over it,
> > you may be out of luck.
> >
> > --Stewart
> >
> > ----- Original Message -----
> > From: "sgenius sgenius"
> > To:
> > Sent: Friday, July 09, 2004 12:31 PM
> > Subject: NAT through about gnugk
> >
> >
> > > Hello~everybody
> > > i do some NAT through test about gnugk
> > > I use the older version gnugk 2.0.6
> > > my environment is follow
> > > GK
> > > / \
> > > / \
> > > NAT1 NAT2
> > > | |
> > > EP1 EP2
> > > NAT throught must to solve two question
> > > 1.the address in h323 potocol have be changed by NAT
> > > GK will register EP's private IP.But gnugk already
> > > slove the question.I check the package by use ethereal
> > > address transform work well in route mode
> > > 2.If EP1 and EP2 is register success in GK and GK setup is route mode
> > > If i is EP1.When i make a call to EP2.
> > > EP1 send a Q.931-SETUP to GK through NAT1,then GK routed the Q.931-SETUP
> > > to NAT2.But NAT2 drop the Q.931-SETUP message.Because NAT2 have not
> > > EP2's static address mapping.If i setup the NAT2 static mapping EP2
> > > the call will work well.
> > >
> > > setup NAT2 static mapping will solve question 2
> > > but most voip user can not do NAT2 static mapping
> > > and static mapping only server one voip user behind NAT
> > > i do not know that gnugk have any solve solution about question 2.(public
> > address to NAT)
> > > If have any more good solution for question 2.Pleae tell me ..thanks



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