PPTP on PIX501.

Hi all,
could someone help me where problem could be?
I did configuration like this:
sysopt connection permit-pptp
ip local pool mypool
10.10.10.1-10.10.10.10
vpdn username test password test2
vpdn group 1 accept dialin pptp
vpdn group 1 client configuration address local mypool
vpdn group 1 ppp authentication mschap
vpdn group 1 client authentication local
vpdn group 1 ppp encryption mppe 128 required
vpdn enable outside
After that I did connection to our PIX 501 and I successfully connected and obtained IP address. I didnt configure ACL. We have one server translated with static. But problem is that I cannot connect to this server throught VPN.
After that I have configured explicit ACL but output is the same.
Any suggestion?
BR
jl

few things that I noticed in your config are:
I don't see any crypto and isakmp commands
1. you don't need "access-list Inter_net deny ip any any " since this is implied by the ACL rules.
2. This ACL "access-list Inter_LAN deny ip any any log 4" on your inside interface preventing all other traffic to be blocked.
3. I will change the ACL no_nat to:
access-list no_nat extended permit ip host 192.168.2.150 255.255.255.255 192.168.10.0 255.255.255.0
4. change the pool to 192.168.10.1-192.168.10.10 mask 255.255.255.0

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    Aug 24 23:44:25 MyArchBox NetworkManager[578]: ** Message: PPTP service (IP Config Get) reply received.
    Aug 24 23:44:25 MyArchBox pppd[1945]: Terminating on signal 15
    Aug 24 23:44:25 MyArchBox pppd[1945]: Modem hangup
    Aug 24 23:44:25 MyArchBox pptp[1954]: nm-pptp-service-1938 log[callmgr_main:pptp_callmgr.c:245]: Closing connection (unhandled)
    Aug 24 23:44:25 MyArchBox pptp[1954]: nm-pptp-service-1938 log[ctrlp_rep:pptp_ctrl.c:258]: Sent control packet type is 12 'Call-Clear-Request'
    Aug 24 23:44:25 MyArchBox pptp[1954]: nm-pptp-service-1938 log[call_callback:pptp_callmgr.c:84]: Closing connection (call state)
    Aug 24 23:44:25 MyArchBox pppd[1945]: Connect time 0.0 minutes.
    Aug 24 23:44:25 MyArchBox pppd[1945]: Sent 0 bytes, received 0 bytes.
    Aug 24 23:44:25 MyArchBox pppd[1945]: MPPE disabled
    Aug 24 23:44:25 MyArchBox pppd[1945]: Connection terminated.
    Aug 24 23:44:25 MyArchBox dbus[579]: [system] Rejected send message, 10 matched rules; type="error", sender=":1.51" (uid=0 pid=1938 comm="/usr/lib/networkmanager/nm-pptp-service ") interface="(unset)" member="(unset)" error name="org.freedesktop.DBus.Error.UnknownMethod" requested_reply="0" destination=":1.52" (uid=0 pid=1945 comm="/sbin/pppd pty /sbin/pptp 192.168.146.114 --nolaunc")
    Aug 24 23:44:25 MyArchBox dbus[579]: [system] Rejected send message, 10 matched rules; type="error", sender=":1.51" (uid=0 pid=1938 comm="/usr/lib/networkmanager/nm-pptp-service ") interface="(unset)" member="(unset)" error name="org.freedesktop.DBus.Error.UnknownMethod" requested_reply="0" destination=":1.52" (uid=0 pid=1945 comm="/sbin/pppd pty /sbin/pptp 192.168.146.114 --nolaunc")
    Aug 24 23:44:25 MyArchBox dbus[579]: [system] Rejected send message, 10 matched rules; type="error", sender=":1.51" (uid=0 pid=1938 comm="/usr/lib/networkmanager/nm-pptp-service ") interface="(unset)" member="(unset)" error name="org.freedesktop.DBus.Error.UnknownMethod" requested_reply="0" destination=":1.52" (uid=0 pid=1945 comm="/sbin/pppd pty /sbin/pptp 192.168.146.114 --nolaunc")
    Aug 24 23:44:25 MyArchBox dbus[579]: [system] Rejected send message, 10 matched rules; type="error", sender=":1.51" (uid=0 pid=1938 comm="/usr/lib/networkmanager/nm-pptp-service ") interface="(unset)" member="(unset)" error name="org.freedesktop.DBus.Error.UnknownMethod" requested_reply="0" destination=":1.52" (uid=0 pid=1945 comm="/sbin/pppd pty /sbin/pptp 192.168.146.114 --nolaunc")
    Aug 24 23:44:25 MyArchBox dbus[579]: [system] Rejected send message, 10 matched rules; type="error", sender=":1.51" (uid=0 pid=1938 comm="/usr/lib/networkmanager/nm-pptp-service ") interface="(unset)" member="(unset)" error name="org.freedesktop.DBus.Error.UnknownMethod" requested_reply="0" destination=":1.52" (uid=0 pid=1945 comm="/sbin/pppd pty /sbin/pptp 192.168.146.114 --nolaunc")
    Aug 24 23:44:25 MyArchBox NetworkManager[578]: inet 10.17.0.0/16 table main
    Aug 24 23:44:25 MyArchBox NetworkManager[578]: priority 0x1 protocol static
    Aug 24 23:44:25 MyArchBox NetworkManager[578]: nexthop via 10.17.1.1 dev 10
    Aug 24 23:44:25 MyArchBox NetworkManager[578]: <error> [1408949065.487073] [platform/nm-linux-platform.c:2252] link_change(): Netlink error changing link 10:  <DOWN> mtu 0 (1) driver 'unknown' udi '/sys/devices/virtual/net/ppp0': No such device
    Aug 24 23:44:25 MyArchBox NetworkManager[578]: <error> [1408949065.487153] [platform/nm-linux-platform.c:1777] delete_object(): Netlink error deleting 10.17.10.3/32 lft forever pref forever lifetime 1862-0[4294967295,4294967295] dev ppp0 src kernel: No such device (-31)
    Aug 24 23:44:25 MyArchBox NetworkManager[578]: ** Message: Terminated ppp daemon with PID 1945.
    Aug 24 23:44:25 MyArchBox kernel: Loading kernel module for a network device with CAP_SYS_MODULE (deprecated).  Use CAP_NET_ADMIN and alias netdev- instead.
    Aug 24 23:44:25 MyArchBox NetworkManager[578]: Terminating on signal 15
    Aug 24 23:44:25 MyArchBox NetworkManager[578]: Modem hangup
    Aug 24 23:44:25 MyArchBox NetworkManager[578]: ** Message: nm-pptp-ppp-plugin: (nm_phasechange): status 8 / phase 'network'
    Aug 24 23:44:25 MyArchBox NetworkManager[578]: Connect time 0.0 minutes.
    Aug 24 23:44:25 MyArchBox NetworkManager[578]: Sent 0 bytes, received 0 bytes.
    Aug 24 23:44:25 MyArchBox NetworkManager[578]: MPPE disabled
    Aug 24 23:44:25 MyArchBox NetworkManager[578]: ** Message: nm-pptp-ppp-plugin: (nm_phasechange): status 10 / phase 'terminate'
    Aug 24 23:44:25 MyArchBox NetworkManager[578]: ** Message: nm-pptp-ppp-plugin: (nm_phasechange): status 5 / phase 'establish'
    Aug 24 23:44:25 MyArchBox NetworkManager[578]: ** Message: nm-pptp-ppp-plugin: (nm_phasechange): status 5 / phase 'establish'
    Aug 24 23:44:25 MyArchBox NetworkManager[578]: ** Message: nm-pptp-ppp-plugin: (nm_phasechange): status 11 / phase 'disconnect'
    Aug 24 23:44:25 MyArchBox NetworkManager[578]: Connection terminated.
    Aug 24 23:44:25 MyArchBox NetworkManager[578]: ** Message: nm-pptp-ppp-plugin: (nm_phasechange): status 1 / phase 'dead'
    Aug 24 23:44:25 MyArchBox dbus[579]: [system] Rejected send message, 10 matched rules; type="error", sender=":1.51" (uid=0 pid=1938 comm="/usr/lib/networkmanager/nm-pptp-service ") interface="(unset)" member="(unset)" error name="org.freedesktop.DBus.Error.UnknownMethod" requested_reply="0" destination=":1.52" (uid=0 pid=1945 comm="/sbin/pppd pty /sbin/pptp 192.168.146.114 --nolaunc")
    Aug 24 23:44:25 MyArchBox NetworkManager[578]: ** Message: nm-pptp-ppp-plugin: (nm_exit_notify): cleaning up
    Aug 24 23:44:25 MyArchBox pppd[1945]: Exit.
    Aug 24 23:44:25 MyArchBox NetworkManager[578]: ** (nm-pptp-service:1938): WARNING **: pppd exited with error code 16
    Aug 24 23:44:45 MyArchBox NetworkManager[578]: <info> VPN service 'pptp' disappeared
    If you've gotten this far, thank you for taking the time to read through all this!  Any help that you can give would be much appreciated.
    Last edited by greyseal96 (2014-08-27 15:20:02)

    Hmm, not sure about the 3.16 series kernel, but I found that when I upgraded to kernel 3.18 the PPTP VPN also stopped working.  This time, though, it was because, for some reason, there was a change in kernel 3.18 where the firewall kernel modules necessary for the VPN don't get loaded so the firewall won't allow some of the PPTP traffic from the remote side back in.  Since the firewall is stateful, these modules need to be loaded so that the firewall can know that the incoming PPTP traffic from the remote side is part of an existing connection.  Here's what my network manager logs looked like:
    NetworkManager[619]: <info> Starting VPN service 'pptp'...
    NetworkManager[619]: <info> VPN service 'pptp' started (org.freedesktop.NetworkManager.pptp), PID 31139
    NetworkManager[619]: <info> VPN service 'pptp' appeared; activating connections
    NetworkManager[619]: <info> VPN connection 'MyVPN' (ConnectInteractive) reply received.
    NetworkManager[619]: <info> VPN plugin state changed: starting (3)
    NetworkManager[619]: ** Message: pppd started with pid 31148
    NetworkManager[619]: <info> VPN connection 'MyVPN' (Connect) reply received.
    pppd[31148]: Plugin /usr/lib/pppd/2.4.7/nm-pptp-pppd-plugin.so loaded.
    NetworkManager[619]: Plugin /usr/lib/pppd/2.4.7/nm-pptp-pppd-plugin.so loaded.
    NetworkManager[619]: ** Message: nm-pptp-ppp-plugin: (plugin_init): initializing
    pppd[31148]: pppd 2.4.7 started by root, uid 0
    NetworkManager[619]: ** Message: nm-pptp-ppp-plugin: (nm_phasechange): status 3 / phase 'serial connection'
    pppd[31148]: Using interface ppp0
    pppd[31148]: Connect: ppp0 <--> /dev/pts/5
    NetworkManager[619]: Using interface ppp0
    NetworkManager[619]: Connect: ppp0 <--> /dev/pts/5
    NetworkManager[619]: ** Message: nm-pptp-ppp-plugin: (nm_phasechange): status 5 / phase 'establish'
    NetworkManager[619]: <info> (ppp0): new Generic device (driver: 'unknown' ifindex: 7)
    NetworkManager[619]: <info> (ppp0): exported as /org/freedesktop/NetworkManager/Devices/6
    pptp[31150]: nm-pptp-service-31139 log[main:pptp.c:333]: The synchronous pptp option is NOT activated
    pptp[31157]: nm-pptp-service-31139 log[ctrlp_rep:pptp_ctrl.c:258]: Sent control packet type is 1 'Start-Control-Connection-Request'
    pptp[31157]: nm-pptp-service-31139 log[ctrlp_disp:pptp_ctrl.c:758]: Received Start Control Connection Reply
    pptp[31157]: nm-pptp-service-31139 log[ctrlp_disp:pptp_ctrl.c:792]: Client connection established.
    pptp[31157]: nm-pptp-service-31139 log[ctrlp_rep:pptp_ctrl.c:258]: Sent control packet type is 7 'Outgoing-Call-Request'
    pptp[31157]: nm-pptp-service-31139 log[ctrlp_disp:pptp_ctrl.c:877]: Received Outgoing Call Reply.
    pptp[31157]: nm-pptp-service-31139 log[ctrlp_disp:pptp_ctrl.c:916]: Outgoing call established (call ID 0, peer's call ID 25344).
    pppd[31148]: LCP: timeout sending Config-Requests <===HERE IS WHERE THE CONNECTION FAILS BECAUSE THE MODULES AREN'T LOADED.
    pppd[31148]: Connection terminated.
    NetworkManager[619]: LCP: timeout sending Config-Requests
    NetworkManager[619]: ** Message: nm-pptp-ppp-plugin: (nm_phasechange): status 11 / phase 'disconnect'
    NetworkManager[619]: Connection terminated.
    NetworkManager[619]: <warn> VPN plugin failed: connect-failed (1)
    NetworkManager[619]: ** Message: nm-pptp-ppp-plugin: (nm_phasechange): status 1 / phase 'dead'
    pppd[31148]: Modem hangup
    pppd[31148]: Exit.
    NetworkManager[619]: <warn> VPN plugin failed: connect-failed (1)
    NetworkManager[619]: Modem hangup
    NetworkManager[619]: ** Message: nm-pptp-ppp-plugin: (nm_exit_notify): cleaning up
    NetworkManager[619]: <warn> VPN plugin failed: connect-failed (1)
    NetworkManager[619]: <info> VPN plugin state changed: stopped (6)
    NetworkManager[619]: <info> VPN plugin state change reason: unknown (0)
    NetworkManager[619]: <warn> error disconnecting VPN: Could not process the request because no VPN connection was active.
    NetworkManager[619]: ** (nm-pptp-service:31139): WARNING **: pppd exited with error code 16
    NetworkManager[619]: <info> VPN service 'pptp' disappeared
    To fix this, I had to add a file to the /etc/modules-load.d directory to have the modules loaded into the kernel at boot.  I just created a file called netfilter.conf and put the following in it:
    nf_nat_pptp
    nf_conntrack_pptp
    nf_conntrack_proto_gre
    Not sure if this addresses your problem or not, but maybe it's worth a look.

  • How do I reconnect my PPTP vpn after upgrading to Yosemite

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    See:
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    http://kb.mozillazine.org/Lost_bookmarks

  • How to configure Multiple PPTP VPN Clients on cisco 3g supported Router

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    I want the router to be a PPTP VPN client to 2 independent PPTP servers, both are in different cities in Cisco routers. I have tested with one on cisco 1841 aqnd its working fine; but when I add the 2nd, its using vpdn-group 1 and therefore connecting to the wrong PPTP server:
    here is the config for the one that works:
    vpdn-group 1
    request-dialin
    protocol pptp
    rotary-group 0
    initiate-to ip xxx.xxx.xxx.xxx
    interface Dialer0
    mtu 1450
    ip address negotiated
    ip pim dense-mode
    ip nat outside
    ip virtual-reassembly
    zone-member security private
    encapsulation ppp
    ip igmp query-interval 125
    dialer in-band
    dialer idle-timeout 0
    dialer string 123
    dialer vpdn
    dialer-group 1
    no peer neighbor-route
    no cdp enable
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    ppp pfc remote apply
    ppp encrypt mppe auto
    ppp authentication ms-chap-v2 ms-chap eap chap pap callin
    ppp eap refuse
    ppp chap hostname xxx@xxx
    ppp chap password 7 xxxpassword
    But if I create a vpdn-group 2 and a Dialer1 interface, with dialer-group 2, its still attempting to connect to the IP in vpdn-group 1 - how do I get it to use the 2nd vpdn-group, or how do I make this work? and which cisco 3G Router you prefer because these are remote sites and only 3G Internet service is available.

  • How to Configure an Cisco 5505 for PPTP VPN connectivity

    I currently have a Cisco ASA 5505(ASA Version 8.2(1), and ASDM gui version 6.2) and a Windows 2008 R2 server with one NIC card. Currently the router is connected to the interent sucessfully using the 'outside' interface(devices connected to the 'inside' interface have access to the internet and are assigned IP addresses via DHCP on the Windows 2008 Server which is also connected to the 'inside' interface) When connected with a client on the inside interface I can establish a VPN connection with the W2008 server, however when I try to connect through the internet I cannot. I have tried researching this on the internet, but have not had much luck. I know it has something to do with pptp port and allowing gre, but I am not familiar enough with configuring Cisco devices or the language they use, to configure this router. I feel as though I am missing something small but very critical. Any help or feedback you can provide regarding this issue is most appreicated, thank you.
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    Hi,
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    http://www.cisco.com/en/US/docs/routers/csbr/rv0xx/administration/guide/rv0xx_AG_78-19576.pdf
    If you need further assistance please feel free to contact Cisco Small Business for help in configuring and troubleshooting your VPN.
    Thank you,
    Jason Nickle

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  • Why is RV082 PPTP no longer working with Windows 7 clients?

    RV082 Firmware Version 2.0.2.01-tmRV082 Firmware Version 2.0.2.01-tm
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    Hi Tad,
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    best regards,
    Herbert
    Cisco Moderator

  • Windows 8.1 pro pptp vpn does not show disconnect option

    I just installed Windows 8.1 PRO on my PC.
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    konkani

    I just installed Windows 8.1 PRO on my PC.
    Formatted it, installed right from scratch.
    Once I created my login, I then created a connection to my office VPN server.
    Office VPN server is a ISA server which allows PPTP based VPN.
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    Then I realized that after double clicking that VPN connection you can then see the status window, where a disconnect button does exists and clicking that does disconnect the VPN.
    But this is crazy.
    Why do we now have to go so deep, just to disconnect!
    This never happens in windows 7, windows 7 with SP1, Windows 8
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    BUMP!
    konkani

  • Macbook can't connect via L2TP but can via PPTP. iPhone can connect to both

    So I've been banging my head up against the wall for the better part of this morning trying to figure this out. Just as a note, I'm 3000 miles from my house and server, but I do have access to it for the time being via PPTP.
    Before I left, I verified that I could connect with L2TP on my iphone's 3G network. I was also able to connect at the airport on my Macbook using L2TP. Sometime overnight something changed, and I can't figure out what. I noticed that my phone dropped it's VPN connection saying something like "the connection to the server dropped unexpectedly" or such. After that, I was unable to connect over L2TP on my macbook or iphone. On a whim I tried connecting over PPTP which worked! But only on my macbook. Again on a whim I tried to connect via L2TP on my iphone, and it worked?! I rinsed, lathered and repeated that process over and over again and confirmed that I could only connect over L2TP on my iPhone after connecting on my macbook over PPTP. Also, on my iphone, if I stored the password it wouldn't authenticate (probably not related).
    As of this moment I am connected using L2TP on my iphone for the last hour, using it to successfully stream Pandora across US borders, but can't sustain a PPTP connection on my macbook for longer than 10 mins. And I still can't connect over L2TP. So that said here are the client and server logs (ips, domains and usernames masked....) Server and clients are in different timezones:
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    Mon Dec 21 12:30:32 2009 : L2TP connecting to server 'nnn.nnn.nnn' (xxx.xxx.xxx.xxx)...
    Mon Dec 21 12:30:32 2009 : IPSec connection started
    Mon Dec 21 12:30:32 2009 : IPSec phase 1 client started
    Mon Dec 21 12:30:42 2009 : IPSec connection failed
    *Server Log for the above transaction:*
    NO RECORD
    *Macbook when trying to connect via PPTP:*
    Mon Dec 21 12:49:44 2009 : PPTP connecting to server 'nnn.nnn.nnn' (xxx.xxx.xxx.xxx)...
    Mon Dec 21 12:49:44 2009 : PPTP connection established.
    Mon Dec 21 12:49:45 2009 : Using interface ppp0
    Mon Dec 21 12:49:45 2009 : Connect: ppp0 <--> socket[34:17]
    Mon Dec 21 12:49:48 2009 : MPPE 128-bit stateless compression enabled
    Mon Dec 21 12:49:49 2009 : route_interface: write routing socket failed, File exists. (address xxx.xxx.xxx.0, mask 255.255.255.0, interface ppp0, host 0).
    Mon Dec 21 12:49:49 2009 : local IP address xxx.xxx.xxx.233
    Mon Dec 21 12:49:49 2009 : remote IP address xxx.xxx.xxx.109
    Mon Dec 21 12:49:49 2009 : primary DNS address xxx.xxx.xxx.109
    Mon Dec 21 12:49:49 2009 : secondary DNS address xxx.xxx.xxx.109
    Mon Dec 21 12:49:49 2009 : pptpwaitinput: Address added. previous interface setting (name: en1, address: xxx.xxx.xxx.6), current interface setting (name: ppp0, family: PPP, address: xxx.xxx.xxx.233, subnet: 255.255.255.0, destination: xxx.xxx.xxx.109).
    *Server Log for the above transaction:*
    2009-12-21 09:49:44 PST Incoming call... Address given to client = xxx.xxx.xxx.233
    Mon Dec 21 09:49:44 2009 : Directory Services Authentication plugin initialized
    Mon Dec 21 09:49:44 2009 : Directory Services Authorization plugin initialized
    Mon Dec 21 09:49:44 2009 : PPTP incoming call in progress from 'xxx.xxx.xxx.xxx'…
    Mon Dec 21 09:49:44 2009 : PPTP connection established.
    Mon Dec 21 09:49:44 2009 : using link 1
    Mon Dec 21 09:49:44 2009 : Using interface ppp1
    Mon Dec 21 09:49:44 2009 : Connect: ppp1 <--> socket[34:17]
    Mon Dec 21 09:49:44 2009 : sent [LCP ConfReq id=0x1 <asyncmap 0x0> <auth chap MS-v2> <magic 0x206a2bb5> <pcomp> <accomp>]
    Mon Dec 21 09:49:45 2009 : rcvd [LCP ConfReq id=0x1 <asyncmap 0x0> <magic 0x4b8d229c> <pcomp> <accomp>]
    Mon Dec 21 09:49:45 2009 : lcp_reqci: returning CONFACK.
    Mon Dec 21 09:49:45 2009 : sent [LCP ConfAck id=0x1 <asyncmap 0x0> <magic 0x4b8d229c> <pcomp> <accomp>]
    Mon Dec 21 09:49:47 2009 : sent [LCP ConfReq id=0x1 <asyncmap 0x0> <auth chap MS-v2> <magic 0x206a2bb5> <pcomp> <accomp>]
    Mon Dec 21 09:49:48 2009 : rcvd [LCP ConfAck id=0x1 <asyncmap 0x0> <auth chap MS-v2> <magic 0x206a2bb5> <pcomp> <accomp>]
    Mon Dec 21 09:49:48 2009 : sent [LCP EchoReq id=0x0 magic=0x206a2bb5]
    Mon Dec 21 09:49:48 2009 : sent [CHAP Challenge id=0x7f <3b77645a35056d6f176a3d4302524136>, name = "OSXServer.kimnet"]
    Mon Dec 21 09:49:48 2009 : rcvd [LCP EchoReq id=0x0 magic=0x4b8d229c]
    Mon Dec 21 09:49:48 2009 : sent [LCP EchoRep id=0x0 magic=0x206a2bb5]
    Mon Dec 21 09:49:48 2009 : rcvd [LCP EchoRep id=0x0 magic=0x4b8d229c]
    Mon Dec 21 09:49:48 2009 : rcvd [CHAP Response id=0x7f <51f69894a74fc550cf12b270ceb43da90000000000000000d7a8e304c6080e5d0315a47e9783a4 8ce2ae8fdb00671adc00>, name = "nnnnnnnn"]
    Mon Dec 21 09:49:48 2009 : sent [CHAP Success id=0x7f "S=09A448E00B717E032D200EAEFA793E57AF9B9676 M=Access granted"]
    Mon Dec 21 09:49:48 2009 : CHAP peer authentication succeeded for nnnnnnnn
    Mon Dec 21 09:49:48 2009 : DSAccessControl plugin: User 'nnnnnnnn' authorized for access
    Mon Dec 21 09:49:48 2009 : sent [CCP ConfReq id=0x1 <mppe +H -M +S -L -D -C>]
    Mon Dec 21 09:49:48 2009 : rcvd [CCP ConfReq id=0x1 <mppe +H -M +S -L -D -C>]
    Mon Dec 21 09:49:48 2009 : sent [CCP ConfAck id=0x1 <mppe +H -M +S -L -D -C>]
    Mon Dec 21 09:49:48 2009 : rcvd [CCP ConfAck id=0x1 <mppe +H -M +S -L -D -C>]
    Mon Dec 21 09:49:48 2009 : MPPE 128-bit stateless compression enabled
    Mon Dec 21 09:49:48 2009 : sent [IPCP ConfReq id=0x1 <addr xxx.xxx.xxx.109>]
    Mon Dec 21 09:49:48 2009 : sent [ACSCP ConfReq id=0x1]
    Mon Dec 21 09:49:49 2009 : rcvd [IPCP ConfReq id=0x1 <addr 0.0.0.0> <ms-dns1 0.0.0.0> <ms-dns3 0.0.0.0>]
    Mon Dec 21 09:49:49 2009 : ipcp: returning Configure-NAK
    Mon Dec 21 09:49:49 2009 : sent [IPCP ConfNak id=0x1 <addr xxx.xxx.xxx.233> <ms-dns1 xxx.xxx.xxx.109> <ms-dns3 xxx.xxx.xxx.109>]
    Mon Dec 21 09:49:49 2009 : rcvd [IPV6CP ConfReq id=0x1 <addr fe80::0217:f2ff:fec8:ef86>]
    Mon Dec 21 09:49:49 2009 : Unsupported protocol 0x8057 received
    Mon Dec 21 09:49:49 2009 : sent [LCP ProtRej id=0x2 80 57 01 01 00 0e 01 0a 02 17 f2 ff fe c8 ef 86]
    Mon Dec 21 09:49:49 2009 : rcvd [IPCP ConfAck id=0x1 <addr xxx.xxx.xxx.109>]
    Mon Dec 21 09:49:49 2009 : rcvd [LCP ProtRej id=0x2 82 35 01 01 00 04]
    Mon Dec 21 09:49:49 2009 : rcvd [IPCP ConfReq id=0x2 <addr xxx.xxx.xxx.233> <ms-dns1 xxx.xxx.xxx.109> <ms-dns3 xxx.xxx.xxx.109>]
    Mon Dec 21 09:49:49 2009 : ipcp: returning Configure-ACK
    Mon Dec 21 09:49:49 2009 : sent [IPCP ConfAck id=0x2 <addr xxx.xxx.xxx.233> <ms-dns1 xxx.xxx.xxx.109> <ms-dns3 xxx.xxx.xxx.109>]
    Mon Dec 21 09:49:49 2009 : ipcp: up
    Mon Dec 21 09:49:49 2009 : l2tpwaitinput: Address added. previous interface setting (name: en0, address: xxx.xxx.xxx.109), current interface setting (name: ppp1, family: PPP, address: xxx.xxx.xxx.109, subnet: 255.255.255.0, destination: xxx.xxx.xxx.233).
    Mon Dec 21 09:49:49 2009 : found interface en0 for proxy arp
    Mon Dec 21 09:49:49 2009 : local IP address xxx.xxx.xxx.109
    Mon Dec 21 09:49:49 2009 : remote IP address xxx.xxx.xxx.233
    Mon Dec 21 09:49:49 2009 : pptpwaitinput: Address added. previous interface setting (name: en0, address: xxx.xxx.xxx.109), current interface setting (name: ppp1, family: PPP, address: xxx.xxx.xxx.109, subnet: 255.255.255.0, destination: xxx.xxx.xxx.233).
    Mon Dec 21 09:49:49 2009 : rcvd [IP data <src addr xxx.xxx.xxx.233> <dst addr 255.255.255.255> <BOOTP Request> <type INFORM> <client id 0x08000000010000> <parameters = 0x6 0x2c 0x2b 0x1 0xf9 0xf>]
    Mon Dec 21 09:49:49 2009 : sent [IP data <src addr xxx.xxx.xxx.109> <dst addr xxx.xxx.xxx.233> <BOOTP Reply> <type ACK> <server id 0xc0a8016d> <domain name "nnn.nnn.nnn">]
    *Server Log for iPhone L2TP login:*
    2009-12-21 09:52:38 PST Incoming call... Address given to client = xxx.xxx.xxx.202
    Mon Dec 21 09:52:38 2009 : Directory Services Authentication plugin initialized
    Mon Dec 21 09:52:38 2009 : Directory Services Authorization plugin initialized
    Mon Dec 21 09:52:38 2009 : L2TP incoming call in progress from 'xxx.xxx.xxx.xxx'...
    Mon Dec 21 09:52:38 2009 : L2TP received SCCRQ
    Mon Dec 21 09:52:38 2009 : L2TP sent SCCRP
    Mon Dec 21 09:52:38 2009 : L2TP received SCCCN
    Mon Dec 21 09:52:38 2009 : L2TP received ICRQ
    Mon Dec 21 09:52:38 2009 : L2TP sent ICRP
    Mon Dec 21 09:52:38 2009 : L2TP received ICCN
    Mon Dec 21 09:52:38 2009 : L2TP connection established.
    Mon Dec 21 09:52:38 2009 : using link 0
    Mon Dec 21 09:52:38 2009 : Using interface ppp0
    Mon Dec 21 09:52:38 2009 : Connect: ppp0 <--> socket[34:18]
    Mon Dec 21 09:52:38 2009 : sent [LCP ConfReq id=0x1 <asyncmap 0x0> <auth chap MS-v2> <magic 0x6b3541df> <pcomp> <accomp>]
    Mon Dec 21 09:52:38 2009 : rcvd [LCP ConfReq id=0x1 <asyncmap 0x0> <magic 0x24ff54dc> <pcomp> <accomp>]
    Mon Dec 21 09:52:38 2009 : lcp_reqci: returning CONFACK.
    Mon Dec 21 09:52:38 2009 : sent [LCP ConfAck id=0x1 <asyncmap 0x0> <magic 0x24ff54dc> <pcomp> <accomp>]
    Mon Dec 21 09:52:39 2009 : rcvd [LCP ConfAck id=0x1 <asyncmap 0x0> <auth chap MS-v2> <magic 0x6b3541df> <pcomp> <accomp>]
    Mon Dec 21 09:52:39 2009 : sent [LCP EchoReq id=0x0 magic=0x6b3541df]
    Mon Dec 21 09:52:39 2009 : sent [CHAP Challenge id=0x6d <4322331b3d22406914173d5e0d176c29>, name = "nnn.nnn.nnn"]
    Mon Dec 21 09:52:39 2009 : rcvd [LCP EchoReq id=0x0 magic=0x24ff54dc]
    Mon Dec 21 09:52:39 2009 : sent [LCP EchoRep id=0x0 magic=0x6b3541df]
    Mon Dec 21 09:52:39 2009 : rcvd [LCP EchoRep id=0x0 magic=0x24ff54dc]
    Mon Dec 21 09:52:39 2009 : rcvd [CHAP Response id=0x6d <f46ecd855c624eef611f02096c87d7650000000000000000f7430743bc328cbca68540408d0103 2e0a60fb95fcc2b83600>, name = "xxxxxxx"]
    Mon Dec 21 09:52:39 2009 : sent [CHAP Success id=0x6d "S=0A046B9F1C59085076A8F2B736929E19391BDC4B M=Access granted"]
    Mon Dec 21 09:52:39 2009 : CHAP peer authentication succeeded for xxxxxxx
    Mon Dec 21 09:52:39 2009 : DSAccessControl plugin: User 'xxxxxx' authorized for access
    Mon Dec 21 09:52:39 2009 : sent [IPCP ConfReq id=0x1 <addr xxx.xxx.xxx.109>]
    Mon Dec 21 09:52:39 2009 : sent [ACSCP ConfReq id=0x1]
    Mon Dec 21 09:52:40 2009 : rcvd [IPCP ConfReq id=0x1 <addr 0.0.0.0> <ms-dns1 0.0.0.0> <ms-dns3 0.0.0.0>]
    Mon Dec 21 09:52:40 2009 : ipcp: returning Configure-NAK
    Mon Dec 21 09:52:40 2009 : sent [IPCP ConfNak id=0x1 <addr xxx.xxx.xxx.202> <ms-dns1 xxx.xxx.xxx.109> <ms-dns3 xxx.xxx.xxx.109>]
    Mon Dec 21 09:52:40 2009 : rcvd [IPV6CP ConfReq id=0x1 <addr fe80::8948:cf2a:8334:7077>]
    Mon Dec 21 09:52:40 2009 : Unsupported protocol 0x8057 received
    Mon Dec 21 09:52:40 2009 : sent [LCP ProtRej id=0x2 80 57 01 01 00 0e 01 0a 89 48 cf 2a 83 34 70 77]
    Mon Dec 21 09:52:40 2009 : rcvd [IPCP ConfAck id=0x1 <addr xxx.xxx.xxx.109>]
    Mon Dec 21 09:52:40 2009 : rcvd [LCP ProtRej id=0x2 82 35 01 01 00 04]
    Mon Dec 21 09:52:40 2009 : rcvd [IPCP ConfReq id=0x2 <addr xxx.xxx.xxx.202> <ms-dns1 xxx.xxx.xxx.109> <ms-dns3 xxx.xxx.xxx.109>]
    Mon Dec 21 09:52:40 2009 : ipcp: returning Configure-ACK
    Mon Dec 21 09:52:40 2009 : sent [IPCP ConfAck id=0x2 <addr xxx.xxx.xxx.202> <ms-dns1 xxx.xxx.xxx.109> <ms-dns3 xxx.xxx.xxx.109>]
    Mon Dec 21 09:52:40 2009 : ipcp: up
    Mon Dec 21 09:52:40 2009 : pptpwaitinput: Address added. previous interface setting (name: en0, address: xxx.xxx.xxx.109), current interface setting (name: ppp0, family: PPP, address: xxx.xxx.xxx.109, subnet: 255.255.255.0, destination: xxx.xxx.xxx.202).
    Mon Dec 21 09:52:40 2009 : found interface en0 for proxy arp
    Mon Dec 21 09:52:40 2009 : local IP address xxx.xxx.xxx.109
    Mon Dec 21 09:52:40 2009 : remote IP address xxx.xxx.xxx.202
    Mon Dec 21 09:52:40 2009 : l2tpwaitinput: Address added. previous interface setting (name: en0, address: xxx.xxx.xxx.109), current interface setting (name: ppp0, family: PPP, address: xxx.xxx.xxx.109, subnet: 255.255.255.0, destination: xxx.xxx.xxx.202).

    I'm having similar issues but not much luck getting any answers. I made a similar post here - maybe something in there will help you.
    One thing I have been able to pinpoint is that the MobileMe Back To My Mac service was causing quite a few issues with being able to connect to the VPN. Once I turn off the service, connection seems to work fine. Although, once I'm connected, I cannot access file sharing. Still waiting for some answers on that.

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