Once I connect to my Cisco 7120 pptp server I get the below messages
about Protocol-Reject for unsupported protocol 0x9c61 I am
authenticated, get a ip address, etc There is no connectivity, it is
like the packets never leave my computer. Is this a MTU issue, or
something else?

[tim-jones-Titanium:~] sjones% sudo tail -30l /var/log/system.log
Oct 3 06:39:02 tim-jones-Titanium lookupd[2170]: lookupd (version
272) starting - Fri Oct 3 06:39:02 2003
Oct 3 06:39:02 tim-jones-Titanium pppd[2100]: PPTP disconnecting...
Oct 3 06:39:02 tim-jones-Titanium pppd[2100]: PPTP disconnected
Oct 3 06:39:02 tim-jones-Titanium pppd[2100]: Exit.
Oct 3 06:39:02 tim-jones-Titanium root: setting hostname to
tim-jones-Titanium.local.
Oct 3 06:39:03 tim-jones-Titanium configd[109]: executing
/System/Library/SystemConfiguration/Kicker.bundle/Resources/set-hostname
Oct 3 06:39:03 tim-jones-Titanium root: setting hostname to
tim-jones-Titanium.local.
Oct 3 06:48:35 tim-jones-Titanium WindowServer[184]:
CGXRemoveTrackingArea : Invalid tracking area
Oct 3 06:58:20 tim-jones-Titanium pppd[2219]: pppd 2.4.0 started by
root, uid 0
Oct 3 06:58:20 tim-jones-Titanium pppd[2219]: PPTP connecting to
server 'vpn.corporatedata.com' (21.4.168.4)...
Oct 3 06:58:20 tim-jones-Titanium mach_kernel: pptp_wan_attach, link
index = 0, (ld = 0x314ef04)
Oct 3 06:58:20 tim-jones-Titanium pppd[2219]: PPTP connection
established.
Oct 3 06:58:20 tim-jones-Titanium pppd[2219]: Using interface ppp0
Oct 3 06:58:20 tim-jones-Titanium pppd[2219]: Connect: ppp0 <-->
socket[34:17]
Oct 3 06:58:21 tim-jones-Titanium pppd[2219]: MPPE 128 bit, stateless
compression enabled
Oct 3 06:58:21 tim-jones-Titanium pppd[2219]: local IP address
10.192.1.149
Oct 3 06:58:21 tim-jones-Titanium pppd[2219]: remote IP address
21.4.168.4
Oct 3 06:58:21 tim-jones-Titanium pppd[2219]: primary DNS address
10.150.0.10
Oct 3 06:58:21 tim-jones-Titanium configd[109]: executing
/System/Library/SystemConfiguration/Kicker.bundle/Resources/set-hostname
Oct 3 06:58:21 tim-jones-Titanium configd[109]: executing
/System/Library/SystemConfiguration/Kicker.bundle/Resources/restart-NetInfo
Oct 3 06:58:21 tim-jones-Titanium configd[109]: executing
/System/Library/SystemConfiguration/Kicker.bundle/Resources/restart-lookupd
Oct 3 06:58:21 tim-jones-Titanium configd[109]: executing
/System/Library/SystemConfiguration/Kicker.bundle/Resources/restart-NetInfo
Oct 3 06:58:21 tim-jones-Titanium lookupd[2236]: lookupd (version
272) starting - Fri Oct 3 06:58:21 2003
Oct 3 06:58:21 tim-jones-Titanium configd[109]: executing
/System/Library/SystemConfiguration/Kicker.bundle/Resources/restart-lookupd
Oct 3 06:58:22 tim-jones-Titanium root: setting hostname to
tim-jones-Titanium.local.
Oct 3 06:58:22 tim-jones-Titanium configd[109]: executing
/System/Library/SystemConfiguration/Kicker.bundle/Resources/set-hostname
Oct 3 06:58:22 tim-jones-Titanium lookupd[2254]: lookupd (version
272) starting - Fri Oct 3 06:58:22 2003
Oct 3 06:58:22 tim-jones-Titanium root: setting hostname to
tim-jones-Titanium.local.
Oct 3 06:58:58 tim-jones-Titanium pppd[2219]: Protocol-Reject for
unsupported protocol 0x9c61