PPP VPN Connection Issue...

Question

Level 1

26 points

PPP VPN Connection Issue...

Hallo Dear Networking Professionals!

I try to connect to PPP VPN with native Mac OS X 10.5.2 VPN Client. "Send all traffic over VPN connection" and "Use verbose logging" options are turned on as well as VPN Service taken first position in Network Services list. After 1 minute of connection it disconnects from server with the following log:

*Mon May 19 14:28:42 2008 : PPTP connecting to server 'xxx.xxx.xxx.xxx' (xxx.xxx.xxx.xxx)...*
*Mon May 19 14:28:42 2008 : PPTP connection established.*
*Mon May 19 14:28:42 2008 : using link 0*
*Mon May 19 14:28:42 2008 : Using interface ppp0*
*Mon May 19 14:28:43 2008 : Connect: ppp0 <--> socket[34:17]*
*Mon May 19 14:28:43 2008 : sent [LCP ConfReq id=0x1 <asyncmap 0x0> <magic 0xf7839a98> <pcomp> <accomp>]*
*Mon May 19 14:28:43 2008 : rcvd [LCP ConfReq id=0x0 <mru 1400> <auth chap MS-v2> <magic 0x13f87e88> <pcomp> <accomp> <callback CBCP> <mrru 1614> <endpoint 13 17 01 8d 94 d1 f9 47 9d 45 dc aa 3b 68 10 be ab 10 6c 00 00 00 00> < 17 04 00 36>]*
*Mon May 19 14:28:43 2008 : lcp_reqci: rcvd unknown option 13*
*Mon May 19 14:28:43 2008 : lcp_reqci: rcvd unknown option 23*
*Mon May 19 14:28:43 2008 : lcp_reqci: returning CONFREJ.*
*Mon May 19 14:28:43 2008 : sent [LCP ConfRej id=0x0 <callback CBCP> <mrru 1614> < 17 04 00 36>]*
*Mon May 19 14:28:43 2008 : rcvd [LCP ConfAck id=0x1 <asyncmap 0x0> <magic 0xf7839a98> <pcomp> <accomp>]*
*Mon May 19 14:28:43 2008 : rcvd [LCP ConfReq id=0x1 <mru 1400> <auth chap MS-v2> <magic 0x13f87e88> <pcomp> <accomp> <endpoint 13 17 01 8d 94 d1 f9 47 9d 45 dc aa 3b 68 10 be ab 10 6c 00 00 00 00>]*
*Mon May 19 14:28:43 2008 : lcp_reqci: returning CONFACK.*
*Mon May 19 14:28:43 2008 : sent [LCP ConfAck id=0x1 <mru 1400> <auth chap MS-v2> <magic 0x13f87e88> <pcomp> <accomp> <endpoint 13 17 01 8d 94 d1 f9 47 9d 45 dc aa 3b 68 10 be ab 10 6c 00 00 00 00>]*
*Mon May 19 14:28:43 2008 : sent [LCP EchoReq id=0x0 magic=0xf7839a98]*
*Mon May 19 14:28:43 2008 : rcvd [CHAP Challenge id=0x0 <db146deac49a288bd1bda3e621899034>, name = "ISA-MGN"]*
*Mon May 19 14:28:43 2008 : sent [CHAP Response id=0x0 <ce953760c6cbbd50c96991baafe84de6000000000000000033e66d3260b4b62e16645310b8d39f a1f6cb32d1a7ba567500>, name = "user"]*
*Mon May 19 14:28:43 2008 : rcvd [LCP EchoRep id=0x0 magic=0x13f87e88]*
*Mon May 19 14:28:43 2008 : rcvd [CHAP Success id=0x0 "S=63E350684A41CA676D493E282C6F8D5B351ABC20"]*
*Mon May 19 14:28:43 2008 : sent [CCP ConfReq id=0x1 <mppe +H -M +S -L -D -C>]*
*Mon May 19 14:28:43 2008 : rcvd [CCP ConfReq id=0x3 <mppe +H +M +S +L -D +C>]*
*Mon May 19 14:28:43 2008 : sent [CCP ConfNak id=0x3 <mppe +H -M +S -L -D -C>]*
*Mon May 19 14:28:43 2008 : rcvd [IPCP ConfReq id=0x4 <addr 192.168.8.151>]*
*Mon May 19 14:28:43 2008 : sent [IPCP TermAck id=0x4]*
*Mon May 19 14:28:43 2008 : rcvd [CCP ConfAck id=0x1 <mppe +H -M +S -L -D -C>]*
*Mon May 19 14:28:43 2008 : rcvd [CCP ConfReq id=0x5 <mppe +H -M +S -L -D -C>]*
*Mon May 19 14:28:43 2008 : sent [CCP ConfAck id=0x5 <mppe +H -M +S -L -D -C>]*
*Mon May 19 14:28:43 2008 : MPPE 128-bit stateless compression enabled*
*Mon May 19 14:28:43 2008 : sent [IPCP ConfReq id=0x1 <addr 0.0.0.0> <ms-dns1 0.0.0.0> <ms-dns3 0.0.0.0>]*
*Mon May 19 14:28:43 2008 : sent [IPV6CP ConfReq id=0x1 <addr fe80::021e:c2ff:fe1e:06b0>]*
*Mon May 19 14:28:43 2008 : sent [ACSCP] 01 01 00 10 01 06 00 00 00 01 02 06 00 00 00 01*
*Mon May 19 14:28:44 2008 : rcvd [IPCP ConfNak id=0x1 <addr 192.168.8.54> <ms-dns1 192.168.9.113> <ms-dns3 192.168.9.129>]*
*Mon May 19 14:28:44 2008 : sent [IPCP ConfReq id=0x2 <addr 192.168.8.54> <ms-dns1 192.168.9.113> <ms-dns3 192.168.9.129>]*
*Mon May 19 14:28:44 2008 : rcvd [LCP ProtRej id=0x6 80 57 01 01 00 0e 01 0a 02 1e c2 ff fe 1e 06 b0]*
*Mon May 19 14:28:44 2008 : rcvd [LCP ProtRej id=0x7 82 35 01 01 00 10 01 06 00 00 00 01 02 06 00 00 00 01]*
*Mon May 19 14:28:44 2008 : rcvd [IPCP ConfAck id=0x2 <addr 192.168.8.54> <ms-dns1 192.168.9.113> <ms-dns3 192.168.9.129>]*
*Mon May 19 14:28:45 2008 : rcvd [IPCP ConfReq id=0x8 <addr 192.168.8.151>]*
*Mon May 19 14:28:45 2008 : ipcp: returning Configure-ACK*
*Mon May 19 14:28:45 2008 : sent [IPCP ConfAck id=0x8 <addr 192.168.8.151>]*
*Mon May 19 14:28:45 2008 : ipcp: up*
*Mon May 19 14:28:45 2008 : local IP address 192.168.8.54*
*Mon May 19 14:28:45 2008 : remote IP address 192.168.8.151*
*Mon May 19 14:28:45 2008 : primary DNS address 192.168.9.113*
*Mon May 19 14:28:45 2008 : secondary DNS address 192.168.9.129*
*Mon May 19 14:28:45 2008 : sent [IP data <src addr 192.168.8.54> <dst addr 255.255.255.255> <BOOTP Request> <type INFORM> <client id 0x08000000010000> <parameters = 0x6 0x2c 0x2b 0x1 0xf9 0xf>]*
*Mon May 19 14:28:48 2008 : sent [IP data <src addr 192.168.8.54> <dst addr 255.255.255.255> <BOOTP Request> <type INFORM> <client id 0x08000000010000> <parameters = 0x6 0x2c 0x2b 0x1 0xf9 0xf>]*
*Mon May 19 14:28:51 2008 : sent [IP data <src addr 192.168.8.54> <dst addr 255.255.255.255> <BOOTP Request> <type INFORM> <client id 0x08000000010000> <parameters = 0x6 0x2c 0x2b 0x1 0xf9 0xf>]*
*Mon May 19 14:28:54 2008 : sent [IP data <src addr 192.168.8.54> <dst addr 255.255.255.255> <BOOTP Request> <type INFORM> <client id 0x08000000010000> <parameters = 0x6 0x2c 0x2b 0x1 0xf9 0xf>]*
*Mon May 19 14:28:57 2008 : sent [IP data <src addr 192.168.8.54> <dst addr 255.255.255.255> <BOOTP Request> <type INFORM> <client id 0x08000000010000> <parameters = 0x6 0x2c 0x2b 0x1 0xf9 0xf>]*
*Mon May 19 14:29:00 2008 : No DHCP server replied*
*Mon May 19 14:29:42 2008 : PPTP error when sending echo_reply : Network is unreachable*
*Mon May 19 14:29:42 2008 : PPTP hangup*
*Mon May 19 14:29:42 2008 : ipcp: down*
*Mon May 19 14:29:42 2008 : MPPE disabled*
*Mon May 19 14:29:42 2008 : sent [LCP TermReq id=0x2 "MPPE disabled"]*
*Mon May 19 14:29:42 2008 : Connection terminated.*
*Mon May 19 14:29:42 2008 : Connect time 1.0 minutes.*
*Mon May 19 14:29:42 2008 : Sent 4672 bytes, received 0 bytes.*
*Mon May 19 14:29:42 2008 : PPTP disconnecting...*
*Mon May 19 14:29:42 2008 : PPTP disconnected*

Can you help me to figure out the solution of the problem please?...

MacBook Pro, Mac OS X (10.5.2)

Posted on May 19, 2008 3:33 AM

Reply

Answer 1

Tim Haigh

Level 7

24,198 points

May 19, 2008 3:45 AM in response to AKazak

I have seen PPP session drop due to echo packets not getting a response. This is simple to fix with a standard modem PPP connection as there is an option to turn of echo replies.

I have not found that option the vpn advanced option.

Do you have the built in firewall enabled on your mac? If so turn it off and try the vpn connection again. It may be the stealth setting that is blocking the echo requests.

Reply

Answer 2

AKazak Author

Level 1

26 points

May 19, 2008 5:20 AM in response to Tim Haigh

No, I have no firewall, but work through WiFi Access Point, which has VPN pass-through option turned on. Also during the 1 minute of VPN connection I fail to ping know servers.

Is there any other log file to look at?

Reply

Answer 3

AKazak Author

Level 1

26 points

May 21, 2008 11:07 PM in response to Tim Haigh

Any other thoughts?

Reply

Answer 4

AKazak Author

Level 1

26 points

May 29, 2008 5:19 AM in response to AKazak

I figured out that my VPN server is Microsoft ISA. I contacted to the server administration and they stated that the server uses IPCP only and no DHCP is available for Microsoft ISA. They also reported that according to my log the Mac OS X VPN Client had obtained IP adress, but for some reason was waiting for a DHCP server response....

Any ideas about the way to turn off DHCP server responce request in the Mac OS X VPN Client?

Reply

Answer 5

AKazak Author

Level 1

26 points

May 30, 2008 9:21 AM in response to AKazak

I found a sollution of the problem!

If somebody is interested, I'll post it...

Reply

Answer 6

McGeek

Level 1

55 points

Jun 2, 2008 5:48 PM in response to AKazak

Consider me interested 🙂

Reply

Answer 7

AKazak Author

Level 1

26 points

Jun 7, 2008 2:04 AM in response to McGeek

Suggested reading: http://www.dslreports.com/forum/r17592755-VPN-Question

I connect to Internet using ASUS WL300g Wi-Fi Access Point. Initially it was configured in the way that "Subnet Mask" parameter in "LAN IP Settings" section of native web configurator was "255.255.255.13".

*Once I've changed "Subnet Mask" parameter from "255.255.255.13" to "255.255.255.0" the problem resolved and now my PPTP VPN connection is working normally.*

Comment: when I change "Subnet Mask" parameter from "255.255.255.0" to any other value like "255.255.255.XXX" the issue occurs again.

I've figured out the sollution, but not reason...
Does anyone have any idea of why Mac OS X prefers "255.255.255.0" for "Subnet Mask", while Windows XP works normally regardless the "Subnet Mask" value?

Please don't hesitate to post your experience...

Reply