pptp and ppp

[Jay Hall]

OK, I have some additional information from TCPDUMP and I'm not really 
sure what I am being told.

Here is part of the output from tcpdump.

23:10:41.232115 ppp048076.usmo.com > a.b.c.d: gre [KAv1] ID:0000 A:241 [|gre]
23:10:41.241938 ppp048076.usmo.com > a.b.c.d: gre [KSv1] ID:0000 S:503 ppp: Prot-Rej(3), Rejected-Protocol=2145
23:10:41.558003 a.b.c.d > ppp048076.usmo.com: gre [KAv1] ID:a3c6 A:503 [|gre]

 From what I can tell, I am connecting to the pptp server correctly, and 
the routes are being established, but I am unable to connect to any 
services on the remote network, or ping any hosts.

Please let me know what additional information might be helpful

Thanks,



Jay Hall wrote:

> I have a FreeBSD server in one of the smaller offices I support using
> ppp and nat to provide an Internet connection to the people in the
> office.  Now, they want to connect to the corporate network using pptp.
>
> My plan here is to simply connect the FreeBSD box to the corporate
> network using pptp and then allow the clients to use the FreeBSD box as
> their gateway to the corporate network.
>
> I am able to connect to the VPN using the pptpclient port without any
> problems.  However, from the FreeBSD box, I am only able to ping the IP
> address assigned to tun1 (created by the VPN).  The routes appear to be
> correct.
>
> Following is the output of netstat -rn
>
>> Routing tables
>>
>> Internet:
>> Destination        Gateway            Flags    Refs      Use  Netif 
>> Expire
>> default            209.248.48.3       UGSc        2       65   tun0
>> 10.129/16          10.129.10.10       UGSc        0       11   tun1
>> 10.129.10.10       10.129.10.140      UH          2        2   tun1
>> 127.0.0.1          127.0.0.1          UH          0        0    lo0
>> 192.168.40         10.129.10.10       UGSc        0        0   tun1
>> 209.248.48.3       209.248.48.149     UH          3        0   tun0
>>
>>  
>>
> tun0 is created by ppp and tun1 is created by pptp.
>
> Following is my ppp.conf file.
>
>> ################################################################
>> # PPP  Sample Configuration File
>> # Originally written by Toshiharu OHNO
>> # Simplified 5/14/1999 by wself at cdrom.com
>> #
>> # See /usr/share/examples/ppp/ for some examples
>> #
>> # $FreeBSD: src/etc/ppp/ppp.conf,v 1.2.2.5 2001/07/13 10:55:23 brian 
>> Exp $
>> #################################################################
>>
>> default:
>> set log Phase Chat LCP IPCP CCP tun command
>> ident user-ppp VERSION (built COMPILATIONDATE)
>>
>> # Ensure that "device" references the correct serial port
>> # for your modem. (cuaa0 = COM1, cuaa1 = COM2)
>> #
>>  set device /dev/cuaa0
>>
>>  set speed 115200
>>  set dial "ABORT BUSY ABORT NO\\sCARRIER TIMEOUT 5 \
>>           \"\" AT OK-AT-OK ATE1Q0 OK \\dATDT\\T TIMEOUT 40 CONNECT"
>>  set timeout 180            # 3 minute idle timer (the default)
>>  enable dns                # request DNS info (for resolv.conf)
>>
>> papchap:
>> #
>> # edit the next three lines and replace the items in caps with
>> # the values which have been assigned by your ISP.
>> #
>>
>> set phone AAA-BBBB
>> set authname XXXXX
>> set authkey YYYYY
>> set timeout 0
>> set ifaddr 10.0.0.1/0 10.0.0.2/0 255.255.255.255
>> add default HISADDR            # Add a (sticky) default route
>> # nat enable yes
>> mneavpn:
>> set log phase chat lcp ipcp ccp tun command
>> set timeout 0
>> # enable dns
>> set authname CCCCC
>> set authkey DDDDD
>> # set mppe 128 stateless
>> set ifaddr 0 0 add 10.129.0.0/16 HISADDR
>> # add 172.16.8.0/255.255.248.0 HISADDR
>> add 192.168.40.0/24 HISADDR
>> # alias enable yes
>>  
>>
> Following are the errors I am seeing in ppp.log
>
>> Sep 16 16:19:10 MNEA-Springfield ppp[243]: tun1: Phase: Unknown 
>> protocol 0x2145 (unrecognised protocol) Sep 16 16:19:10 
>> MNEA-Springfield ppp[243]: tun1: LCP: deflink: SendProtocolRej(3) 
>> state = Opened Sep 16 16:19:13 MNEA-Springfield ppp[243]: tun1: 
>> Phase: Unknown protocol 0x2145 (unrecognised protocol) Sep 16 
>> 16:19:13 MNEA-Springfield ppp[243]: tun1: LCP: deflink: 
>> SendProtocolRej(3) state = Opened Sep 16 16:19:19 MNEA-Springfield 
>> ppp[243]: tun1: Phase: deflink: HDLC errors -> FCS: 0, ADDR: 0, COMD: 
>> 0, PROTO: 3 Sep 16 16:19:19 MNEA-Springfield ppp[243]: tun1: Phase: 
>> Unknown protocol 0x2145 (unrecognised protocol) Sep 16 16:19:19 
>> MNEA-Springfield ppp[243]: tun1: LCP: deflink: SendProtocolRej(3) 
>> state = Opened Sep 16 16:19:31 MNEA-Springfield ppp[243]: tun1: 
>> Phase: Unknown protocol 0x2145 (unrecognised protocol) Sep 16 
>> 16:19:31 MNEA-Springfield ppp[243]: tun1: LCP: deflink: 
>> SendProtocolRej(3) state = Opened  
>>
>
> These errors occur whenever I try to access something on the remote
> network via tun1.
>
> gateway_enable="YES" is enabled in rc.conf and router_enable="NO" is
> also set.
>
> Any suggestions as to what might be wrong would be greatly appreciated.
>  I'm sure this is something simple that I have overlooked.
>
> Thanks in advance for your assistance.
>
>
>
> Jay Hall
>
>
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