Date: Mon, 30 Jun 2003 15:37:11 -0700 From: henry tieman <henryt_NOSPAM@aracnet.com> To: Alessandro de Manzano <ale@unixmania.net> Cc: net@freebsd.org Subject: Re: strange PPP negotiation problem with GPRS mobile phone Message-ID: <3F00BB97.1040900@aracnet.com> In-Reply-To: <20030630212122.A72414@libero.sunshine.ale> References: <20030630212122.A72414@libero.sunshine.ale>
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Alessandro de Manzano wrote: >Hello! > >I'm having very strange (to me) PPP problems with a 4.8-R notebook >trying to connect to the Internet via a GPRS mobile phone. > >Note: The exactly same hardware works fine with WinXP so it should work >under FreeBSD also, I guess ;-)) > >Situation: I'm using the following /etc/ppp/ppp.conf file (comments >removed) > > > I use ppp as my usual connection method, it's slow but reliable. My ISP reciently (6 months ago) switched from a "UNIX" terminal server to a "RAS" server. So I had to revisit my ppp config reciently. The only major difference between your configuration file and mine are you disabled lots of things and I set my mtu to 500. If I were trying to get this working - I would comment out the disable lines and set the MTU smaller. Because you are using a mobile phone you may have to set your MTU really small, like 300. Is there a coresponding MRU? If there is it should also be small. There is a posibility that mobile phones want a complete packet before sending any data - in which case you will have to either try to make ppp send larger packets or set the timeout values in ppp to a larger value. And no I don't know what that timeout value is called. I also looked through the trace... there is one thing I saw in my trace but not yours: Jun 30 14:33:20 eric ppp[624]: tun0: LCP: deflink: State change Req-Sent --> Ack -Rcvd Jun 30 14:33:20 eric ppp[624]: tun0: LCP: deflink: RecvConfigReq(2) state = Ack- Rcvd O.K. it's two lines but the trace you sent never enters Ack-Rcvd state before the PAP authentication. And that is probably the symptom of the problem. Henry -- Henry Tieman Objects in the mirror are closer than they appear.
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