VPN (PPTP) Authentication Failed

Question

Hi,
I am trying to Connect to my work network. Work uses a Secure Computing SG560.
The setup at work on the SG560 is as follows:
PPTP VPN Server
Authentication Scheme: Weakly Encrypted Authentication (CHAP)
Encryption: Strong Encryption (MPPE 128 Bit)
On my mac, I have setup a new VPN (PPTP) Connection
Given it the Internet Address
My Account Name
Encryption Auto (And tried Maximum)
Authentication Settings is password with my password set on the SG560.
Pressing Connection I get a prompt saying Authentication failed
In my console I have this (obviously some settings omitted)
6/12/10 06/12/10 - 9:06:48 PM pppd[1825] pppd 2.4.2 (Apple version 412.3) started by wt9bind, uid 501
6/12/10 06/12/10 - 9:06:48 PM pppd[1825] PPTP connecting to server 'x.x.x.x' (x.x.x.x)...
6/12/10 06/12/10 - 9:06:48 PM pppd[1825] PPTP connection established.
6/12/10 06/12/10 - 9:06:48 PM pppd[1825] Connect: ppp0 <--> socket[34:17]
6/12/10 06/12/10 - 9:06:48 PM pppd[1825] MS-CHAP authentication failed:
6/12/10 06/12/10 - 9:06:48 PM pppd[1825] Connection terminated.
6/12/10 06/12/10 - 9:06:48 PM pppd[1825] PPTP disconnecting...
6/12/10 06/12/10 - 9:06:48 PM pppd[1825] PPTP disconnected
The only way to get this working is to change the Authentication Scheme in the SG560 to No Auth
If I do this, it connects perfectly with the following:
6/12/10 06/12/10 - 9:09:15 PM kernel utunctlconnect: creating interface utun0
6/12/10 06/12/10 - 9:09:16 PM pppd[1839] pppd 2.4.2 (Apple version 412.3) started by wt9bind, uid 501
6/12/10 06/12/10 - 9:09:16 PM pppd[1839] PPTP connecting to server 'x.x.x.x' (x.x.x.x)...
6/12/10 06/12/10 - 9:09:16 PM pppd[1839] PPTP connection established.
6/12/10 06/12/10 - 9:09:16 PM pppd[1839] Connect: ppp0 <--> socket[34:17]
6/12/10 06/12/10 - 9:09:17 PM pppd[1839] local IP address x.x.x.x
6/12/10 06/12/10 - 9:09:17 PM pppd[1839] remote IP address x.x.x.x
6/12/10 06/12/10 - 9:09:17 PM pppd[1839] primary DNS address x.x.x.x
6/12/10 06/12/10 - 9:09:17 PM pppd[1839] secondary DNS address x.x.x.x
6/12/10 06/12/10 - 9:09:17 PM configd[14] network configuration changed.
6/12/10 06/12/10 - 9:09:17 PM pppd[1839] pptpwaitinput: Address added. previous interface setting (name: en0, address: 192.168.1.9), current interface setting (name: ppp0, family: PPP, address: x.x.x.x, subnet: 255.255.0.0, destination: x.x.x.x).
6/12/10 06/12/10 - 9:09:17 PM configd[14] network configuration changed.
6/12/10 06/12/10 - 9:09:17 PM vmnet-bridge[234] Dynamic store changed
6/12/10 06/12/10 - 9:09:17 PM vmnet-bridge[234] Could not retrieve media for interface ppp0: Operation not supported on socket.
6/12/10 06/12/10 - 9:09:17 PM kernel vmnet: VMNetDisconnect called for port 0xf8f9f00
6/12/10 06/12/10 - 9:09:17 PM kernel vmnet: Invalidating peer info for hub: 0, port: 0
6/12/10 06/12/10 - 9:09:17 PM kernel vmnet: bridge-en0: filter detached
6/12/10 06/12/10 - 9:09:17 PM kernel vmnet: bridge-en0: down
6/12/10 06/12/10 - 9:09:17 PM kernel vmnet: bridge-en0: detached
6/12/10 06/12/10 - 9:09:17 PM kernel vmnet: Freeing hub at 0xe45a000.
Now obviously running no auth is totally unacceptable.
The options in the SG560 for Authentication Scheme is:
PAP
CHAP
MS-CHAP
MS-CHAPV2
Required Encryption:
No Encryption
Basic Encryption MPPE 40Bit
Strong Encryption MPPE 128Bit
Can somebody tell me why my client on my mac will not connect as soon as the encryption level is changed on the SG560? It works perfectly from Windows.
Thanks

Answer 1

Can anybody help me on this?