Re: 720 error : MPPE problem ?

What looks strange to me ... is that the server refuses to negotiate an
IP address for the client.  As a result of that refusal, the client
eventually stops trying.

Here is your log reduced to only IPCP part of conversation:

> Apr 18 21:42:37 flash pppd[12765]: rcvd [IPCP ConfReq id=0x7 <addr 0.0.0.0> <ms-dns1 0.0.0.0> <ms-wins 0.0.0.0> <ms-dns2 0.0.0.0> <ms-wins 0.0.0.0>]
> Apr 18 21:42:37 flash pppd[12765]: sent [IPCP TermAck id=0x7]
> Apr 18 21:42:37 flash pppd[12765]: sent [IPCP ConfReq id=0x1 <compress VJ 0f 01> <addr 0.0.0.0>]
> Apr 18 21:42:37 flash pppd[12765]: rcvd [IPCP ConfRej id=0x1 <compress VJ 0f 01> <addr 0.0.0.0>]
> Apr 18 21:42:37 flash pppd[12765]: sent [IPCP ConfReq id=0x2 <addrs 0.0.0.0 0.0.0.0>]
> Apr 18 21:42:37 flash pppd[12765]: rcvd [IPCP ConfRej id=0x2 <addrs 0.0.0.0 0.0.0.0>]
> Apr 18 21:42:37 flash pppd[12765]: sent [IPCP ConfReq id=0x3]
> Apr 18 21:42:37 flash pppd[12765]: rcvd [IPCP ConfAck id=0x3]
> Apr 18 21:42:39 flash pppd[12765]: rcvd [IPCP ConfReq id=0x8 <addr 0.0.0.0> <ms-dns1 0.0.0.0> <ms-wins 0.0.0.0> <ms-dns2 0.0.0.0> <ms-wins 0.0.0.0>]
> Apr 18 21:42:39 flash pppd[12765]: sent [IPCP ConfRej id=0x8 <addr 0.0.0.0> <ms-dns1 0.0.0.0> <ms-wins 0.0.0.0> <ms-dns2 0.0.0.0> <ms-wins 0.0.0.0>]
> Apr 18 21:42:39 flash pppd[12765]: rcvd [IPCP ConfReq id=0x9 <addr 0.0.0.0>]
> Apr 18 21:42:39 flash pppd[12765]: sent [IPCP ConfRej id=0x9 <addr 0.0.0.0>]
> Apr 18 21:42:39 flash pppd[12765]: rcvd [IPCP TermReq id=0xa "E\37777777640T\37777777625\000<\37777777715t\000\000\002\37777777742"]
> Apr 18 21:42:39 flash pppd[12765]: sent [IPCP TermAck id=0xa]

The IPCP ConfRej means "The options are not recognised or not acceptable
for negotiation by the peer (e.g. because the remote system is
configured to not allow negotiation). The ConfRej reply will contain
only the options that are unacceptable." and "On receipt of a ConfRej,
the local system must not include the options in any following ConfReq."

This means the server pppd has been configured to not negotiate IP.

> So I wonder if "MPPE 128-bit stateless compression enabled" and " GRE:
> Bad checksum from pppd." are normal.

Yes.

-- 
James Cameron
http://quozl.linux.org.au/

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