about re-negotiate dns server IP

about re-negotiate dns server IP

[c4linux]

HI:
     an established ppp link can re-negotiate some LCP options suchas the dns server address???         


>>You hinder your readers by assuming they can read a long subject line.

I'm sorry  :)

-- 
James Cameron
http://ftp.hp.com.au/sigs/jc/

Re: about re-negotiate dns server IP

[James Cameron]

On Thu, Jul 10, 2008 at 10:53:07AM +0800, c4linux wrote:
> an established ppp link can re-negotiate some LCP options suchas the
> dns server address???

DNS server addresses are negotiated by IPCP as ms-dns, not by LCP.  I
don't know the answer to your question though, sorry.

-- 
James Cameron                         http://quozl.netrek.org/
HP Open Source, Volunteer             http://opensource.hp.com/
PPTP Client Project, Release Engineer http://pptpclient.sourceforge.net/

Re: Re: about re-negotiate dns server IP

[cyx]

>>DNS server addresses are negotiated by IPCP as ms-dns, not by LCP.  I
>>don't know the answer to your question though, sorry.

pppoe-server give its clients DNS address from ms-dns in pppoe-server-options FILE. If I change ms-dns when the ppp link established, will the server re-negotiate the DNS address to its clients? Thank you.

Re: Re: about re-negotiate dns server IP

[James Cameron]

On Thu, Jul 10, 2008 at 11:30:09AM +0800, cyx wrote:
> pppoe-server give its clients DNS address from ms-dns in
> pppoe-server-options FILE.

Does it not use pppd for this?

> If I change ms-dns when the ppp link established, will the server
> re-negotiate the DNS address to its clients?

Yes, I understand your question, I just don't know whether you can
restart IPCP negotiation.  I imagine it might be possible, with suitable
coding.

I don't see the need for such a feature though.  It would be more common
to use a virtual IP for DNS instead, and readdress packets as they
arrive.

--
James Cameron                         http://quozl.netrek.org/
HP Open Source, Volunteer             http://opensource.hp.com/
PPTP Client Project, Release Engineer http://pptpclient.sourceforge.net/

Re: Re: Re: about re-negotiate dns server IP

[cyx]

>Yes, I understand your question, I just don't know whether you can
>restart IPCP negotiation.  I imagine it might be possible, with suitable
>coding.

>I don't see the need for such a feature though.  It would be more common
>to use a virtual IP for DNS instead, and readdress packets as they
>arrive.

Thank you :)