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-   -   xl2tpd gives errors and can't connect (https://www.linuxquestions.org/questions/linux-software-2/xl2tpd-gives-errors-and-cant-connect-894523/)

daotiansi 07-29-2011 02:27 PM
xl2tpd gives errors and can't connect
 
I'm trying to connect to a l2tp vpn service that uses L2TP without IPSEC. The server works well while I've used windows xp dial software to connect successful. However, when I installed and configured xl2tpd, I don't know how to make it work.

The configure file as below,

#xl2tpd.conf:
[lac vpdn]
lns = 60.190.129.52
require chap = yes
refuse pap = yes
require authentication = yes
; Name should be the same as the username in the PPP authentication!
name = dcyjx
ppp debug = yes
pppoptfile = /etc/ppp/options.l2tpd.client
length bit = yes


vpdn.l2tpd:
ipcp-accept-local
ipcp-accept-remote
refuse-eap
noccp
noauth
crtscts
idle 1800
mtu 1410
mru 1410
nodefaultroute
debug
lock
#proxyarp
connect-delay 5000

The log says the following:

Jul 30 14:04:25 localhost xl2tpd[8901]: setsockopt recvref[22]: Protocol not available
Jul 30 14:04:25 localhost xl2tpd[8901]: This binary does not support kernel L2TP.
Jul 30 14:04:25 localhost xl2tpd[8902]: xl2tpd version xl2tpd-1.2.6 started on localhost.localdomain PID:8902
Jul 30 14:04:25 localhost xl2tpd[8902]: Written by Mark Spencer, Copyright (C) 1998, Adtran, Inc.
Jul 30 14:04:25 localhost xl2tpd[8902]: Forked by Scott Balmos and David Stipp, (C) 2001
Jul 30 14:04:25 localhost xl2tpd[8902]: Inherited by Jeff McAdams, (C) 2002
Jul 30 14:04:25 localhost xl2tpd[8902]: Forked again by Xelerance (www.xelerance.com) (C) 2006
Jul 30 14:04:25 localhost xl2tpd[8902]: Listening on IP address 0.0.0.0, port 1701
Jul 30 14:04:46 localhost xl2tpd[8902]: Connecting to host 60.190.129.52, port 1701
Jul 30 14:04:46 localhost xl2tpd[8902]: Connection established to 60.190.129.52, 1701. Local: 31891, Remote: 9070 (ref=0/0).
Jul 30 14:04:46 localhost xl2tpd[8902]: Calling on tunnel 31891
Jul 30 14:04:46 localhost xl2tpd[8902]: Call established with 60.190.129.52, Local: 54766, Remote: 32785, Serial: 1 (ref=0/0)
Jul 30 14:04:46 localhost pppd[8905]: pppd 2.4.4 started by root, uid 0
Jul 30 14:04:46 localhost pppd[8905]: Using interface ppp0
Jul 30 14:04:46 localhost pppd[8905]: Connect: ppp0 <--> /dev/pts/5
Jul 30 14:04:46 localhost xl2tpd[8902]: control_finish: Connection closed to 60.190.129.52, serial 1 ()
Jul 30 14:05:18 localhost xl2tpd[8902]: Calling on tunnel 31891
Jul 30 14:05:18 localhost xl2tpd[8902]: Call established with 60.190.129.52, Local: 8575, Remote: 30332, Serial: 2 (ref=0/0)

Could someone help me out?
Let me know what more info is needed.
I'm using redhat rhel 5

daotiansi 07-29-2011 07:32 PM
Can anyone help me ?
It has troubled me for so long!

daotiansi 07-30-2011 01:02 AM
Today, I use the debug command to check the problem, and it seems that there is something wrong with my baud rate. However, I don't know how to fix it, can someone help me ?

debug info in my server:
[root@localhost aaa]# /usr/sbin/l2tpd -D
This binary does not support kernel L2TP.
l2tpd version 0.69 started on localhost.localdomain PID:10319
Written by Mark Spencer, Copyright (C) 1998, Adtran, Inc.
Forked by Scott Balmos and David Stipp, (C) 2001
Inhereted by Jeff McAdams, (C) 2002
Linux version 2.6.18-53.el5 on a i686, listening on IP address 0.0.0.0, port 1701
ourtid = 36250, entropy_buf = 8d9a
check_control: control, cid = 0, Ns = 0, Nr = 0
handle_avps: handling avp's for tunnel 36250, call 0
message_type_avp: message type 1 (Start-Control-Connection-Request)
protocol_version_avp: peer is using version 1, revision 0.
framing_caps_avp: supported peer frames: async sync
bearer_caps_avp: supported peer bearers:
firmware_rev_avp: peer reports firmware version 1680 (0x0690)
hostname_avp: peer reports hostname 'localhost.localdomain'
vendor_avp: peer reports vendor 'xelerance.com'
assigned_tunnel_avp: using peer's tunnel 49517
receive_window_size_avp: peer wants RWS of 4. Will use flow control.
check_control: control, cid = 0, Ns = 1, Nr = 1
handle_avps: handling avp's for tunnel 36250, call 0
message_type_avp: message type 3 (Start-Control-Connection-Connected)
control_finish: Connection established to 60.190.129.51, 1701. Local: 36250, Remote: 49517. LNS session is 'default'
check_control: control, cid = 0, Ns = 2, Nr = 1
handle_avps: handling avp's for tunnel 36250, call 0
message_type_avp: message type 10 (Incoming-Call-Request)
message_type_avp: new incoming call
ourcid = 51788, entropy_buf = ca4c
assigned_call_avp: using peer's call 56350
call_serno_avp: serial number is 4
bearer_type_avp: peer bears:digital
check_control: control, cid = 56350, Ns = 3, Nr = 2
handle_avps: handling avp's for tunnel 36250, call 51788
message_type_avp: message type 12 (Incoming-Call-Connected)
tx_speed_avp: transmit baud rate is 0
frame_type_avp: peer uses:sync frames
rx_speed_avp: receive baud rate is 0
control_finish: Peer did not specify transmit speed
call_close: Call 51788 to 60.190.129.51 disconnected

debug info in my client:
[root@localhost dcyjx]# /usr/sbin/xl2tpd -D &
[1] 8865
[root@localhost dcyjx]# xl2tpd[8865]: parse_config: lac context descriptor vpdn
xl2tpd[8865]: parse_config: field is lns, value is 60.190.129.52
xl2tpd[8865]: set_lns: setting LNS to '60.190.129.52'
xl2tpd[8865]: parse_config: field is require chap, value is yes
xl2tpd[8865]: set_require chap: require chap flag to 'yes'
xl2tpd[8865]: parse_config: field is refuse pap, value is yes
xl2tpd[8865]: set_refuse pap: refuse pap flag to 'yes'
xl2tpd[8865]: parse_config: field is require authentication, value is yes
xl2tpd[8865]: set_require authentication: require authentication flag to 'yes'
xl2tpd[8865]: parse_config: field is name, value is dcyjx
xl2tpd[8865]: set_name: name flag to 'dcyjx'
xl2tpd[8865]: parse_config: field is ppp debug, value is yes
xl2tpd[8865]: set_ppp debug: ppp debug flag to 'yes'
xl2tpd[8865]: parse_config: field is pppoptfile, value is /etc/ppp/options.l2tpd.client
xl2tpd[8865]: set_pppoptfile: pppoptfile flag to '/etc/ppp/options.l2tpd.client'
xl2tpd[8865]: parse_config: field is length bit, value is yes
xl2tpd[8865]: set_length bit: length bit flag to 'yes'
xl2tpd[8865]: setsockopt recvref[22]: Protocol not available
xl2tpd[8865]: This binary does not support kernel L2TP.
xl2tpd[8865]: xl2tpd version xl2tpd-1.2.6 started on localhost.localdomain PID:8865
xl2tpd[8865]: Written by Mark Spencer, Copyright (C) 1998, Adtran, Inc.
xl2tpd[8865]: Forked by Scott Balmos and David Stipp, (C) 2001
xl2tpd[8865]: Inherited by Jeff McAdams, (C) 2002
xl2tpd[8865]: Forked again by Xelerance (www.xelerance.com) (C) 2006
xl2tpd[8865]: Listening on IP address 0.0.0.0, port 1701

[root@localhost dcyjx]# echo "c vpdn" > /var/run/xl2tpd/l2tp-control
[root@localhost dcyjx]# xl2tpd[8865]: do_control: Got message c vpdn (6 bytes long)
xl2tpd[8865]: ourtid = 43333, entropy_buf = a945
xl2tpd[8865]: Connecting to host 60.190.129.52, port 1701
xl2tpd[8865]: trying to send control packet to 43333
xl2tpd[8865]: control_xmit: Scheduling and transmitting packet 0
xl2tpd[8865]: check_control: control, cid = 0, Ns = 0, Nr = 1
xl2tpd[8865]: trying to send control packet to 43333
xl2tpd[8865]: control_xmit: Scheduling and transmitting packet 1
xl2tpd[8865]: control_finish: scheduling initial HELLO on 43333
xl2tpd[8865]: Connection established to 60.190.129.52, 1701. Local: 43333, Remote: 64277 (ref=0/0).
xl2tpd[8865]: ourcid = 1671, entropy_buf = 687
xl2tpd[8865]: Calling on tunnel 43333
xl2tpd[8865]: trying to send control packet to 43333
xl2tpd[8865]: control_xmit: Scheduling and transmitting packet 2
xl2tpd[8865]: check_control: control, cid = 0, Ns = 1, Nr = 2
xl2tpd[8865]: handle_packet: control ZLB received
xl2tpd[8865]: check_control: control, cid = 0, Ns = 1, Nr = 3
xl2tpd[8865]: Call established with 60.190.129.52, Local: 1671, Remote: 38090, Serial: 1 (ref=0/0)
xl2tpd[8865]: trying to send control packet to 43333
xl2tpd[8865]: control_xmit: Scheduling and transmitting packet 3
xl2tpd[8865]: start_pppd: I'm running:
xl2tpd[8865]: "/usr/sbin/pppd"
xl2tpd[8865]: "passive"
xl2tpd[8865]: "nodetach"
xl2tpd[8865]: ":"
xl2tpd[8865]: "refuse-pap"
xl2tpd[8865]: "auth"
xl2tpd[8865]: "require-chap"
xl2tpd[8865]: "name"
xl2tpd[8865]: "dcyjx"
xl2tpd[8865]: "debug"
xl2tpd[8865]: "file"
xl2tpd[8865]: "/etc/ppp/options.l2tpd.client"
xl2tpd[8865]: "/dev/pts/5"
xl2tpd[8865]: check_control: control, cid = 0, Ns = 2, Nr = 3
xl2tpd[8865]: handle_packet: control ZLB received
xl2tpd[8865]: check_control: control, cid = 38090, Ns = 2, Nr = 4
xl2tpd[8865]: handle_packet: control ZLB received
xl2tpd[8865]: check_control: control, cid = 38090, Ns = 2, Nr = 4
xl2tpd[8865]: control_finish: Connection closed to 60.190.129.52, serial 1 ()
xl2tpd[8865]: control_zlb: sending control ZLB on tunnel 64277
xl2tpd[8865]: call_close: Actually closing call 1671
xl2tpd[8865]: Terminating pppd: sending KILL signal to pid 8866
xl2tpd[8865]: trying to send control packet to 43333
xl2tpd[8865]: control_xmit: Tossing packet 0
xl2tpd[8865]: trying to send control packet to 43333
xl2tpd[8865]: control_xmit: Tossing packet 1
xl2tpd[8865]: trying to send control packet to 43333
xl2tpd[8865]: control_xmit: Tossing packet 2
xl2tpd[8865]: trying to send control packet to 43333
xl2tpd[8865]: control_xmit: Tossing packet 3


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