[Samba] Regression of 5616?

[Robert LeBlanc]

On Thu, Jun 3, 2010 at 11:21 AM, Robert LeBlanc <robert at leblancnet.us>wrote:

> On Thu, Jun 3, 2010 at 11:18 AM, Robert LeBlanc <robert at leblancnet.us>wrote:
>
>> On Wed, Jun 2, 2010 at 5:04 PM, Robert LeBlanc <robert at leblancnet.us>wrote:
>>
>>> I'm wondering if I'm seeing a regression of 5616 with 3.4.8. I'm trying
>>> to set-up pptpd with winbind, which I'm doing on two machines on Debian
>>> lenny, and I'm trying on Debian Squeeze now. The Windows client is saying
>>> "Error 778: It was not possible to verify the identity of the server." The
>>> logs say that everything is ok, and that the client is hanging up the
>>> connection. Is something not getting passed correctly like in bug 5616?
>>>
>>> Jun  2 16:56:05 debian pppd[17472]: pppd 2.4.4 started by root, uid 0
>>> Jun  2 16:56:05 debian pppd[17472]: using channel 17
>>> Jun  2 16:56:05 debian pppd[17472]: Using interface ppp0
>>> Jun  2 16:56:05 debian pppd[17472]: Connect: ppp0 <--> /dev/pts/2
>>> Jun  2 16:56:05 debian pppd[17472]: sent [LCP ConfReq id=0x1 <asyncmap
>>> 0x0> <auth chap MS-v2> <magic 0xa2912b7> <pcomp> <accomp>]
>>> Jun  2 16:56:05 debian pptpd[17470]: GRE: Bad checksum from pppd.
>>> Jun  2 16:56:05 debian pppd[17472]: rcvd [LCP ConfReq id=0x0 <mru 1400>
>>> <magic 0x648b71fd> <pcomp> <accomp> <callback CBCP>]
>>> Jun  2 16:56:05 debian pppd[17472]: sent [LCP ConfRej id=0x0 <callback
>>> CBCP>]
>>> Jun  2 16:56:05 debian pppd[17472]: rcvd [LCP ConfAck id=0x1 <asyncmap
>>> 0x0> <auth chap MS-v2> <magic 0xa2912b7> <pcomp> <accomp>]
>>> Jun  2 16:56:05 debian pppd[17472]: rcvd [LCP ConfReq id=0x1 <mru 1400>
>>> <magic 0x648b71fd> <pcomp> <accomp>]
>>> Jun  2 16:56:05 debian pppd[17472]: sent [LCP ConfAck id=0x1 <mru 1400>
>>> <magic 0x648b71fd> <pcomp> <accomp>]
>>> Jun  2 16:56:05 debian pppd[17472]: sent [LCP EchoReq id=0x0
>>> magic=0xa2912b7]
>>> Jun  2 16:56:05 debian pppd[17472]: sent [CHAP Challenge id=0x75
>>> <d33a4de16233bb406c42b02c9801acd4>, name = "debian"]
>>> Jun  2 16:56:05 debian pppd[17472]: rcvd [LCP Ident id=0x2
>>> magic=0x648b71fd "MSRASV5.10"]
>>> Jun  2 16:56:05 debian pppd[17472]: rcvd [LCP Ident id=0x3
>>> magic=0x648b71fd "MSRAS-0-WINCOMP"]
>>> Jun  2 16:56:05 debian pppd[17472]: rcvd [LCP EchoRep id=0x0
>>> magic=0x648b71fd]
>>> Jun  2 16:56:05 debian pppd[17472]: rcvd [CHAP Response id=0x75
>>> <69dbcaab0e152ea056654a46c4ca7bae00000000000000006d7bcc32ef97cfafde7c34570aaa0c55e83b8475da22923300>,
>>> name = "DOMAIN\\user"]
>>> Jun  2 16:56:05 debian pptpd[17470]: CTRL: Ignored a SET LINK INFO packet
>>> with real ACCMs!
>>> Jun  2 16:56:05 debian pppd[17472]: sent [CHAP Success id=0x75
>>> "S=B68D646C4DC626290C5BCD1148AE833C004B1E70 M=Access granted"]
>>> Jun  2 16:56:05 debian pppd[17472]: sent [CCP ConfReq id=0x1 <mppe +H -M
>>> +S -L -D -C>]
>>> Jun  2 16:56:05 debian pppd[17472]: rcvd [LCP TermReq id=0x4
>>> "d\37777777613q\37777777775\000<\37777777715t\000\000\003\n"]
>>> Jun  2 16:56:05 debian pppd[17472]: LCP terminated by peer
>>> (dM-^KqM-}^@<M-Mt^@^@^C^J)
>>> Jun  2 16:56:05 debian pppd[17472]: sent [LCP TermAck id=0x4]
>>> Jun  2 16:56:05 debian pptpd[17470]: CTRL: Reaping child PPP[17472]
>>> Jun  2 16:56:05 debian pppd[17472]: Modem hangup
>>> Jun  2 16:56:05 debian pppd[17472]: Connection terminated.
>>> Jun  2 16:56:05 debian pppd[17472]: Connect time 0.0 minutes.
>>> Jun  2 16:56:05 debian pppd[17472]: Sent 10 bytes, received 0 bytes.
>>> Jun  2 16:56:06 debian pppd[17472]: Exit.
>>>
>>> Any ideas? I'm not sure what else to try, I'm coming up empty handed with
>>> Google.
>>>
>>>
>> I forgot to try this using chap_secrets and include that. When using
>> chap_secrets I can log in and everything works as expected. When I include
>> the winbind.so plug-in, I can't login. Here is the logs from a sucessful
>> PPTP connection using chap_secrets.
>>
>> Jun  3 11:10:35 debian pppd[17826]: Connect: ppp0 <--> /dev/pts/1
>> Jun  3 11:10:35 debian pppd[17826]: sent [LCP ConfReq id=0x1 <asyncmap
>> 0x0> <auth chap MS-v2> <magic 0x122bc19f> <pcomp> <accomp>]
>> Jun  3 11:10:35 debian pptpd[17825]: GRE: Bad checksum from pppd.
>> Jun  3 11:10:35 debian pppd[17826]: rcvd [LCP ConfReq id=0x0 <mru 1400>
>> <magic 0x1f614592> <pcomp> <accomp> <callback CBCP>]
>> Jun  3 11:10:35 debian pppd[17826]: sent [LCP ConfRej id=0x0 <callback
>> CBCP>]
>> Jun  3 11:10:35 debian pppd[17826]: rcvd [LCP ConfReq id=0x1 <mru 1400>
>> <magic 0x1f614592> <pcomp> <accomp>]
>> Jun  3 11:10:35 debian pppd[17826]: sent [LCP ConfAck id=0x1 <mru 1400>
>> <magic 0x1f614592> <pcomp> <accomp>]
>> Jun  3 11:10:38 debian pppd[17826]: sent [LCP ConfReq id=0x1 <asyncmap
>> 0x0> <auth chap MS-v2> <magic 0x122bc19f> <pcomp> <accomp>]
>> Jun  3 11:10:38 debian pptpd[17825]: CTRL: Ignored a SET LINK INFO packet
>> with real ACCMs!
>> Jun  3 11:10:38 debian pppd[17826]: rcvd [LCP ConfAck id=0x1 <asyncmap
>> 0x0> <auth chap MS-v2> <magic 0x122bc19f> <pcomp> <accomp>]
>> Jun  3 11:10:38 debian pppd[17826]: sent [LCP EchoReq id=0x0
>> magic=0x122bc19f]
>> Jun  3 11:10:38 debian pppd[17826]: sent [CHAP Challenge id=0xb6
>> <ee0fbc4ca5a3cecbb50d6a5d681dfceb>, name = "debian"]
>> Jun  3 11:10:38 debian pppd[17826]: rcvd [LCP Ident id=0x2
>> magic=0x1f614592 "MSRASV5.10"]
>> Jun  3 11:10:38 debian pppd[17826]: rcvd [LCP Ident id=0x3
>> magic=0x1f614592 "MSRAS-0-WINCOMP"]
>> Jun  3 11:10:38 debian pppd[17826]: rcvd [LCP EchoRep id=0x0
>> magic=0x1f614592]
>> Jun  3 11:10:38 debian pppd[17826]: rcvd [CHAP Response id=0xb6
>> <4d9f569d005db37bc1a3fd0475dd288f0000000000000000f7a35e82608b4ba7e6137ef1dbd642f03341be46e2c763bf00>,
>> name = "chap_user"]
>> Jun  3 11:10:38 debian pppd[17826]: sent [CHAP Success id=0xb6
>> "S=5BB1A4A6F2B0B1915352569321C0E90C7F2D0A50 M=Access granted"]
>> Jun  3 11:10:38 debian pppd[17826]: sent [CCP ConfReq id=0x1 <mppe +H -M
>> +S -L -D -C>]
>> Jun  3 11:10:38 debian pppd[17826]: rcvd [CCP ConfReq id=0x4 <mppe +H +M
>> +S +L -D +C>]
>> Jun  3 11:10:38 debian pppd[17826]: sent [CCP ConfNak id=0x4 <mppe +H -M
>> +S -L -D -C>]
>> Jun  3 11:10:38 debian pppd[17826]: rcvd [IPCP ConfReq id=0x5 <addr
>> 0.0.0.0> <ms-dns1 0.0.0.0> <ms-wins 0.0.0.0> <ms-dns3 0.0.0.0> <ms-wins
>> 0.0.0.0>]
>> Jun  3 11:10:38 debian pppd[17826]: sent [IPCP TermAck id=0x5]
>> Jun  3 11:10:38 debian pppd[17826]: rcvd [CCP ConfAck id=0x1 <mppe +H -M
>> +S -L -D -C>]
>> Jun  3 11:10:38 debian pppd[17826]: rcvd [CCP ConfReq id=0x6 <mppe +H -M
>> +S -L -D -C>]
>> Jun  3 11:10:38 debian pppd[17826]: sent [CCP ConfAck id=0x6 <mppe +H -M
>> +S -L -D -C>]
>> Jun  3 11:10:38 debian pppd[17826]: MPPE 128-bit stateless compression
>> enabled
>> Jun  3 11:10:38 debian pppd[17826]: sent [IPCP ConfReq id=0x1 <compress VJ
>> 0f 01> <addr 192.168.54.1>]
>> Jun  3 11:10:38 debian pppd[17826]: rcvd [IPCP ConfRej id=0x1 <compress VJ
>> 0f 01>]
>> Jun  3 11:10:38 debian pppd[17826]: sent [IPCP ConfReq id=0x2 <addr
>> 192.168.54.1>]
>> Jun  3 11:10:38 debian pppd[17826]: rcvd [IPCP ConfAck id=0x2 <addr
>> 192.168.54.1>]
>> Jun  3 11:10:40 debian pppd[17826]: rcvd [IPCP ConfReq id=0x7 <addr
>> 0.0.0.0> <ms-dns1 0.0.0.0> <ms-wins 0.0.0.0> <ms-dns3 0.0.0.0> <ms-wins
>> 0.0.0.0>]
>> Jun  3 11:10:40 debian pppd[17826]: sent [IPCP ConfRej id=0x7 <ms-dns1
>> 0.0.0.0> <ms-wins 0.0.0.0> <ms-dns3 0.0.0.0> <ms-wins 0.0.0.0>]
>> Jun  3 11:10:40 debian pppd[17826]: rcvd [IPCP ConfReq id=0x8 <addr
>> 0.0.0.0>]
>> Jun  3 11:10:40 debian pppd[17826]: sent [IPCP ConfNak id=0x8 <addr
>> 192.168.54.181>]
>> Jun  3 11:10:40 debian pppd[17826]: rcvd [IPCP ConfReq id=0x9 <addr
>> 192.168.54.181>]
>> Jun  3 11:10:40 debian pppd[17826]: sent [IPCP ConfAck id=0x9 <addr
>> 192.168.54.181>]
>> Jun  3 11:10:40 debian pppd[17826]: found interface eth0.69 for proxy arp
>> Jun  3 11:10:40 debian pppd[17826]: local  IP address 192.168.54.1
>> Jun  3 11:10:40 debian pppd[17826]: remote IP address 192.168.54.181
>> Jun  3 11:10:40 debian pppd[17826]: pptpd-logwtmp.so ip-up ppp0 chap_user
>> x.x.x.x
>> Jun  3 11:10:40 debian pppd[17826]: Script /etc/ppp/ip-up started (pid
>> 17829)
>> Jun  3 11:10:40 debian pppd[17826]: Script /etc/ppp/ip-up finished (pid
>> 17829), status = 0x0
>>
>> I did a tcpdump of the failing PPTP session and I could not find any
>> useful information, I can send that to a dev if needed.
>>
>> Thanks,
>>
>
> Sorry, one more thing, I downloaded the source for the Debian package I'm
> using and it does have the patch mentioned in 5616. I wonder if something
> else changed that may be causing this regression.
>

This list is kind of quiet today, so I'll respond to my own e-mail. Looks
like there is a bug almost a year old that has been filed #6522 for this, I
added that this affects 3.4.x and 3.5.x as well. I hope a fix can be found
soon.

Robert LeBlanc
Life Sciences & Undergraduate Education Computer Support
Brigham Young University