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ASL 5 - PPTP Problems

toddyo_01
Initial PPTP attempt responds with a Windows Error 737: Loopback Detected.....  Second attempt usually is successful when using 'Local Users' database.

When attempting to use RADIUS, the connection never is successful - Windows Error 734.  

The PPTP Log reports the following:

2004:04:26-20:24:57 (none) pptpd[3117]: CTRL: Client 192.168.32.22 control connection started
2004:04:26-20:24:57 (none) pptpd[3117]: CTRL: Starting call (launching pppd, opening GRE)
2004:04:26-20:24:57 (none) pppd-pptp[3118]: Plugin /usr/sbin/radius.so loaded.
2004:04:26-20:24:57 (none) pppd-pptp[3118]: RADIUS plugin initialized.
2004:04:26-20:24:57 (none) pppd-pptp[3118]: Plugin /usr/sbin/radattr.so loaded.
2004:04:26-20:24:57 (none) pppd-pptp[3118]: RADATTR plugin initialized.
2004:04:26-20:24:57 (none) pppd-pptp[3118]: Plugin /usr/sbin/radius.so loaded.
2004:04:26-20:24:57 (none) pppd-pptp[3118]: RADIUS plugin initialized.
2004:04:26-20:24:57 (none) pppd-pptp[3118]: Plugin /usr/sbin/radattr.so loaded.
2004:04:26-20:24:57 (none) pptpd[3117]: GRE: Bad checksum from pppd.
2004:04:26-20:24:57 (none) pptpd[3117]: GRE: Bad checksum from pppd.
2004:04:26-20:24:57 (none) pptpd[3117]: GRE: Received too short packet from pppd.
2004:04:26-20:24:57 (none) pptpd[3117]: GRE: Bad checksum from pppd.
2004:04:26-20:24:57 (none) pppd-pptp[3118]: RADATTR plugin initialized.
2004:04:26-20:24:57 (none) pppd-pptp[3118]: pppd 2.4.2 started by (unknown), uid 0
2004:04:26-20:24:57 (none) pppd-pptp[3118]: Starting negotiation on /dev/ttyp0
2004:04:26-20:24:57 (none) pptpd[3117]: GRE: Bad checksum from pppd.
2004:04:26-20:24:59 (none) pppd-pptp[3118]: peer refused to authenticate: terminating link
2004:04:26-20:24:59 (none) pptpd[3117]: CTRL: Ignored a SET LINK INFO packet with real ACCMs!
2004:04:26-20:24:59 (none) pppd-pptp[3118]: Connection terminated.
2004:04:26-20:24:59 (none) pppd-pptp[3118]: Exit.


Anyone else experiencing these kinds of problems with PPTP?


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  • 0
    Hi,

    I have the same problem with PPTP and local user. 
    I must connect two or three times to establish a connection.
    Somtimes it works at the first attempt.
    I do not use a radiusserver so I don't no if I get the second error too.
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