Re: [gentoo-user] pptp client under nat

[Etaoin Shrdlu]

On Tuesday 29 April 2008, 15:48, Vladimir Rusinov wrote:

> I've setup chap-secrets and peer and when I'm doing #pon my_vpn I'm
> getting following:
> using channel 32
> Using interface ppp0
> Connect: ppp0 <--> /dev/pts/7
> sent [LCP ConfReq id=0x1 <asyncmap 0x0> <magic 0x24770bb6> <pcomp>
> <accomp>] rcvd [LCP ConfReq id=0x0 <mru 1448> <auth chap MS-v2> <magic
> <snip>>] sent [LCP ConfAck id=0x0 <mru 1448> <auth chap MS-v2> <magic
> <snip>>] rcvd [LCP ConfRej id=0x1 <asyncmap 0x0> <pcomp> <accomp>]
> sent [LCP ConfReq id=0x2 <magic <snip>>]
> rcvd [LCP ConfAck id=0x2 <magic <snip>>]
> <snip>
> rcvd [CHAP Success id=0x17 "<snip>"]
> CHAP authentication succeeded
> sent [IPCP ConfReq id=0x1 <compress VJ 0f 01> <addr 192.168.1.3>]
> rcvd [CCP ConfReq id=0x0 <mppe +H +M +S +L -D -C>]
> sent [CCP ConfReq id=0x1]
> sent [CCP ConfRej id=0x0 <mppe +H +M +S +L -D -C>]
> rcvd [IPCP ConfReq id=0x0 <addr 192.168.5.1>]
> sent [IPCP ConfAck id=0x0 <addr 192.168.5.1>]
> rcvd [IPCP ConfRej id=0x1 <compress VJ 0f 01>]
> sent [IPCP ConfReq id=0x2 <addr 192.168.1.3>]
> rcvd [CCP ConfNak id=0x1 <mppe +H -M +S -L -D -C>]
> sent [CCP ConfReq id=0x2]
> rcvd [CCP TermReq id=0x2]
> sent [CCP TermAck id=0x2]
> rcvd [LCP TermReq id=0x1]
> LCP terminated by peer
> sent [LCP TermAck id=0x1]
> Script pptp --loglevel 1 a.b.c.d --nolaunchpppd finished (pid 27227),
> status = 0x0
> Modem hangup
> Connection terminated.

It looks like a compression negotiation problem, since everything until 
CHAP authentication works. 
Your client rejects the mppe "+H +M +S +L -D -C" options it receives from 
the server.
What's the content of your /etc/ppp/options.pptp file?

Also, did you read this doc:

http://pptpclient.sourceforge.net/howto-diagnosis.phtml
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