Problem PPTP Vpn with TL-R600VPN

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Problem PPTP Vpn with TL-R600VPN

This thread has been locked for further replies. You can start a new thread to share your ideas or ask questions.
Problem PPTP Vpn with TL-R600VPN
Problem PPTP Vpn with TL-R600VPN
2017-05-15 21:29:00 - last edited 2021-08-21 05:52:41
Model :

Hardware Version :

Firmware Version :

ISP :

Hello to all
I have a router TL-R600VPN v2, firmware versione 1.2.3 Build 140801 Rel.49374n

I have a problem with vpn pptp,
sometimes it blocks me and does not access vpn. From none of the users created.
Everything else works, only vpn does not go.

To reset it I must always reboot the router.

Any idea?

Thank's

Alessio
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#1
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6 Reply
Re:Problem PPTP Vpn with TL-R600VPN
2017-06-13 13:45:07 - last edited 2021-08-21 05:52:41
Hey dude, you mean your PPTP VPN server will stop working sometimes? Have you ever try to reopen the function again. Turn off the PPTP server and turn it on again.
What's more, you can try to test if the port 1723 is opened when the issue happen.
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#2
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Re:Problem PPTP Vpn with TL-R600VPN
2017-07-27 17:35:36 - last edited 2021-08-21 05:52:41
Hi,
yes the PPTP VPN server stop many time. Every time i need to reboot the tplink.
The port is always regular opened
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#3
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Re:Problem PPTP Vpn with TL-R600VPN
2017-07-28 10:10:20 - last edited 2021-08-21 05:52:41
If the port 1723 closed sometimes, maybe there is something in your network attack to make the router close it. So it stop working.
I am not sure what it is. Maybe you can find some in the log?
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#4
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Re:Problem PPTP Vpn with TL-R600VPN
2017-09-21 16:10:21 - last edited 2021-08-21 05:52:41
This is the logs when there is the problem

####################################################################
# TL-R600VPN System Log
# Time = 2017-09-20 20:00:22 1323995s
# H-Ver = R600VPN v2 00000000 : S-Ver = 1.2.3 Build 140801 Rel.49374n # L = 192.168.10.200 : M = 255.255.255.0 # W1 = STATIC IP : W = 192.168.1.254 : M = 255.255.255.0 : G = 192.168.1.1 ####################################################################

Sep 15 19:09:57 PPP INFO rcvd [IPCP Req addr=0.0.0.0 dns1=0.0.0.0 dns3=0.0.0.0]
Sep 15 19:09:57 PPP INFO sent [IPCP Nak addr=192.168.10.90 dns1=192.168.10.200 dns3=192.168.10.200]
Sep 15 19:09:57 PPP INFO rcvd [IPCP Req addr=192.168.10.90 dns1=192.168.10.200 dns3=192.168.10.200]
Sep 15 19:09:57 PPP INFO sent [IPCP Ack addr=192.168.10.90 dns1=192.168.10.200 dns3=192.168.10.200]
Sep 15 19:27:30 PPP INFO rcvd [LCP TermReq]
Sep 15 19:27:30 PPP ERROR LCP down
Sep 15 19:27:30 PPP WARNING LCP down
Sep 15 19:27:30 PPP INFO sent [LCP TermAck]
Sep 15 19:27:30 PPP ERROR User request
Sep 15 19:27:33 VPN INFO PPTPS CTRL: Client 77.43.90.225 control connection finished
Sep 15 19:27:33 VPN INFO PPTPS CTRL: Client pppd TERM sending
Sep 15 19:27:33 VPN INFO PPTPS CTRL: Client pppd finish wait
Sep 15 20:00:22 OTHER INFO Mail successfully.
Sep 15 20:11:50 VPN INFO PPTPS CTRL: Client 59.111.30.195 control connection started
Sep 15 20:11:50 VPN ERROR PPTPS CTRL: EOF or bad error reading ctrl packet length.
Sep 15 20:11:50 VPN ERROR PPTPS CTRL: couldn't read packet header (exit)
Sep 15 20:11:50 VPN ERROR PPTPS CTRL: CTRL read failed
Sep 15 20:11:50 VPN INFO PPTPS CTRL: Client 59.111.30.195 control connection finished
Sep 15 23:12:15 VPN ERROR PPTPS MGR: dropped small initial connection
Sep 15 23:12:16 VPN ERROR PPTPS MGR: dropped small initial connection
Sep 15 23:12:16 VPN WARNING PPTPS MGR: initial packet length 18245 outside (0 - 220)
Sep 16 20:00:22 OTHER INFO Mail successfully.
Sep 16 22:07:48 VPN ERROR PPTPS MGR: dropped small initial connection
Sep 16 23:12:21 VPN ERROR PPTPS MGR: dropped small initial connection
Sep 16 23:12:21 VPN ERROR PPTPS MGR: dropped small initial connection
Sep 16 23:12:22 VPN WARNING PPTPS MGR: initial packet length 18245 outside (0 - 220)
Sep 17 17:46:56 VPN INFO PPTPS CTRL: Client 139.162.102.46 control connection started
Sep 17 17:46:57 VPN ERROR PPTPS CTRL: EOF or bad error reading ctrl packet length.
Sep 17 17:46:57 VPN ERROR PPTPS CTRL: couldn't read packet header (exit)
Sep 17 17:46:57 VPN ERROR PPTPS CTRL: CTRL read failed
Sep 17 17:46:57 VPN INFO PPTPS CTRL: Client 139.162.102.46 control connection finished
Sep 17 20:00:22 OTHER INFO Mail successfully.
Sep 17 23:12:11 VPN ERROR PPTPS MGR: dropped small initial connection
Sep 17 23:12:11 VPN ERROR PPTPS MGR: dropped small initial connection
Sep 17 23:12:12 VPN WARNING PPTPS MGR: initial packet length 18245 outside (0 - 220)
Sep 18 10:01:15 VPN INFO PPTPS CTRL: Client 77.43.90.225 control connection started
Sep 18 10:01:15 VPN INFO PPTPS CTRL: Starting call (launching pppd, opening GRE)
Sep 18 10:01:15 PPP INFO sent [LCP Req asyncmap=0x0 auth=chap-MS-v2 magic=0xc026cb5f pcomp accomp]
Sep 18 10:01:15 PPP INFO rcvd [LCP Req mru=1400 magic=0x31a04ca5 pcomp accomp callback=CBCP]
Sep 18 10:01:15 PPP INFO sent [LCP Rej callback=CBCP]
Sep 18 10:01:15 PPP INFO rcvd [LCP Req mru=1400 magic=0x31a04ca5 pcomp accomp]
Sep 18 10:01:15 PPP INFO sent [LCP Ack mru=1400 magic=0x31a04ca5 pcomp accomp]
Sep 18 10:01:18 PPP INFO sent [LCP Req asyncmap=0x0 auth=chap-MS-v2 magic=0xc026cb5f pcomp accomp]
Sep 18 10:01:18 PPP INFO rcvd [LCP code=0xc]
Sep 18 10:01:18 PPP INFO sent [LCP CodeRej]
Sep 18 10:01:18 PPP INFO rcvd [LCP code=0xc]
Sep 18 10:01:18 PPP INFO sent [LCP CodeRej]
Sep 18 10:01:21 PPP INFO sent [LCP Req asyncmap=0x0 auth=chap-MS-v2 magic=0xc026cb5f pcomp accomp]
Sep 18 10:01:21 PPP INFO rcvd [LCP Req mru=1400 magic=0x31a04ca5 pcomp accomp]
Sep 18 10:01:21 PPP INFO sent [LCP Ack mru=1400 magic=0x31a04ca5 pcomp accomp]
Sep 18 10:01:21 PPP INFO rcvd [LCP Ack asyncmap=0x0 auth=chap-MS-v2 magic=0xc026cb5f pcomp accomp]
Sep 18 10:01:21 PPP INFO sent [CHAP Challenge (c0676084aa64cf98813dd1b984de89cb), name = "pptpd"]
Sep 18 10:01:21 PPP INFO rcvd [CHAP Response (9c6851ab3ce57f9e45ab914be2e4ee7500000000000000000bb5db588e6e20df2d67f39af2639d6259b644a3b250aa7800), name = "cassiopea"]
Sep 18 10:01:21 PPP INFO sent [CHAP Success "S=763590C98B85F5100A52B47A0479D9201976B40A M=Access granted"]
Sep 18 10:01:21 PPP INFO sent [CCP ConfReq mppe +H -M +S -L -D -C]
Sep 18 10:01:21 PPP INFO rcvd [CCP ConfReq mppe +H -M -S -L -D -C]
Sep 18 10:01:21 PPP INFO sent [CCP ConfNak mppe +H -M +S -L -D -C]
Sep 18 10:01:21 PPP INFO rcvd [CCP ConfAck mppe +H -M +S -L -D -C]
Sep 18 10:01:21 PPP INFO rcvd [CCP ConfReq mppe +H -M +S -L -D -C]
Sep 18 10:01:21 PPP INFO sent [CCP ConfAck mppe +H -M +S -L -D -C]
Sep 18 10:01:21 PPP INFO sent [IPCP Req addr=192.168.10.200]
Sep 18 10:01:21 PPP INFO rcvd [IPCP Ack addr=192.168.10.200]
Sep 18 10:01:23 PPP INFO rcvd [IPCP Req addr=0.0.0.0 dns1=0.0.0.0 ms-wins=0.0.0.0 dns3=0.0.0.0 ms-wins=0.0.0.0]
Sep 18 10:01:23 PPP INFO sent [IPCP Rej ms-wins=0.0.0.0 ms-wins=0.0.0.0]
Sep 18 10:01:23 PPP INFO rcvd [proto=0x8057] 01 0b 00 0e 01 0a 5c 50 f7 46 c4 f0 42 98
Sep 18 10:01:23 PPP INFO sent [LCP ProtRej]
Sep 18 10:01:23 PPP INFO rcvd [IPCP Req addr=0.0.0.0 dns1=0.0.0.0 dns3=0.0.0.0]
Sep 18 10:01:23 PPP INFO sent [IPCP Nak addr=192.168.10.90 dns1=192.168.10.200 dns3=192.168.10.200]
Sep 18 10:01:23 PPP INFO rcvd [IPCP Req addr=192.168.10.90 dns1=192.168.10.200 dns3=192.168.10.200]
Sep 18 10:01:23 PPP INFO sent [IPCP Ack addr=192.168.10.90 dns1=192.168.10.200 dns3=192.168.10.200]
Sep 18 14:08:30 VPN INFO PPTPS CTRL: Client 139.162.102.46 control connection started
Sep 18 14:08:31 VPN ERROR PPTPS CTRL: EOF or bad error reading ctrl packet length.
Sep 18 14:08:31 VPN ERROR PPTPS CTRL: couldn't read packet header (exit)
Sep 18 14:08:31 VPN ERROR PPTPS CTRL: CTRL read failed
Sep 18 14:08:31 VPN INFO PPTPS CTRL: Client 139.162.102.46 control connection finished
Sep 18 19:11:16 VPN WARNING PPTPS MGR: initial packet length 5635 outside (0 - 220)
Sep 18 19:11:19 VPN ERROR PPTPS MGR: dropped small initial connection
Sep 18 19:11:20 VPN INFO PPTPS CTRL: Client 164.52.7.134 control connection started
Sep 18 19:11:20 VPN ERROR PPTPS CTRL: EOF or bad error reading ctrl packet length.
Sep 18 19:11:20 VPN ERROR PPTPS CTRL: couldn't read packet header (exit)
Sep 18 19:11:20 VPN ERROR PPTPS CTRL: CTRL read failed
Sep 18 19:11:20 VPN INFO PPTPS CTRL: Client 164.52.7.134 control connection finished
Sep 18 19:18:28 PPP INFO rcvd [LCP TermReq]
Sep 18 19:18:28 PPP ERROR LCP down
Sep 18 19:18:28 PPP WARNING LCP down
Sep 18 19:18:28 PPP INFO sent [LCP TermAck]
Sep 18 19:18:28 PPP ERROR User request
Sep 18 19:18:31 VPN INFO PPTPS CTRL: Client 77.43.90.225 control connection finished
Sep 18 19:18:31 VPN INFO PPTPS CTRL: Client pppd TERM sending
Sep 18 19:18:31 VPN INFO PPTPS CTRL: Client pppd finish wait
Sep 18 19:21:47 VPN INFO PPTPS CTRL: Client 77.43.90.225 control connection started
Sep 18 19:21:47 VPN INFO PPTPS CTRL: Starting call (launching pppd, opening GRE)
Sep 18 19:21:47 PPP INFO sent [LCP Req asyncmap=0x0 auth=chap-MS-v2 magic=0xb4d2479f pcomp accomp]
Sep 18 19:21:47 PPP INFO rcvd [LCP Req mru=1400 magic=0x7fec31e0 pcomp accomp callback=CBCP]
Sep 18 19:21:47 PPP INFO sent [LCP Rej callback=CBCP]
Sep 18 19:21:47 PPP INFO rcvd [LCP Ack asyncmap=0x0 auth=chap-MS-v2 magic=0xb4d2479f pcomp accomp]
Sep 18 19:21:47 PPP INFO rcvd [LCP Req mru=1400 magic=0x7fec31e0 pcomp accomp]
Sep 18 19:21:47 PPP INFO sent [LCP Ack mru=1400 magic=0x7fec31e0 pcomp accomp]
Sep 18 19:21:47 PPP INFO sent [CHAP Challenge (66ca5d49b11e907dbd2a29cb61324d91), name = "pptpd"]
Sep 18 19:21:47 PPP INFO rcvd [LCP code=0xc]
Sep 18 19:21:47 PPP INFO sent [LCP CodeRej]
Sep 18 19:21:47 PPP INFO rcvd [LCP code=0xc]
Sep 18 19:21:47 PPP INFO sent [LCP CodeRej]
Sep 18 19:21:47 PPP INFO rcvd [CHAP Response (c6ab59d63395cebbe4cc7b2e22e495d900000000000000001ea0d1513f578c529e2ea110d3ede20707d94b8be7b0006e00), name = "cassiopea"]
Sep 18 19:21:47 PPP INFO sent [CHAP Success "S=C5B292E12BC0940123C080827EB5B18BC2AF9F61 M=Access granted"]
Sep 18 19:21:47 PPP INFO sent [CCP ConfReq mppe +H -M +S -L -D -C]
Sep 18 19:21:47 PPP INFO rcvd [proto=0x8057] 01 05 00 0e 01 0a cc e3 63 a0 ef 95 68 1a
Sep 18 19:21:47 PPP INFO sent [LCP ProtRej]
Sep 18 19:21:47 PPP INFO rcvd [CCP ConfReq mppe +H -M -S -L -D -C]
Sep 18 19:21:47 PPP INFO sent [CCP ConfNak mppe +H -M +S -L -D -C]
Sep 18 19:21:47 PPP INFO rcvd [IPCP Req addr=0.0.0.0 dns1=0.0.0.0 ms-wins=0.0.0.0 dns3=0.0.0.0 ms-wins=0.0.0.0]
Sep 18 19:21:47 PPP INFO sent [IPCP TermAck]
Sep 18 19:21:47 PPP INFO rcvd [CCP ConfAck mppe +H -M +S -L -D -C]
Sep 18 19:21:47 PPP INFO rcvd [CCP ConfReq mppe +H -M +S -L -D -C]
Sep 18 19:21:47 PPP INFO sent [CCP ConfAck mppe +H -M +S -L -D -C]
Sep 18 19:21:47 PPP INFO sent [IPCP Req addr=192.168.10.200]
Sep 18 19:21:48 PPP INFO rcvd [IPCP Ack addr=192.168.10.200]
Sep 18 19:21:49 PPP INFO rcvd [IPCP Req addr=0.0.0.0 dns1=0.0.0.0 ms-wins=0.0.0.0 dns3=0.0.0.0 ms-wins=0.0.0.0]
Sep 18 19:21:49 PPP INFO sent [IPCP Rej ms-wins=0.0.0.0 ms-wins=0.0.0.0]
Sep 18 19:21:49 PPP INFO rcvd [IPCP Req addr=0.0.0.0 dns1=0.0.0.0 dns3=0.0.0.0]
Sep 18 19:21:49 PPP INFO sent [IPCP Nak addr=192.168.10.90 dns1=192.168.10.200 dns3=192.168.10.200]
Sep 18 19:21:49 PPP INFO rcvd [IPCP Req addr=192.168.10.90 dns1=192.168.10.200 dns3=192.168.10.200]
Sep 18 19:21:49 PPP INFO sent [IPCP Ack addr=192.168.10.90 dns1=192.168.10.200 dns3=192.168.10.200]
Sep 18 19:38:19 PPP INFO rcvd [LCP TermReq]
Sep 18 19:38:19 PPP ERROR LCP down
Sep 18 19:38:19 PPP WARNING LCP down
Sep 18 19:38:19 PPP INFO sent [LCP TermAck]
Sep 18 19:38:19 PPP ERROR User request
Sep 18 19:38:23 VPN INFO PPTPS CTRL: Client 77.43.90.225 control connection finished
Sep 18 19:38:23 VPN INFO PPTPS CTRL: Client pppd TERM sending
Sep 18 19:38:23 VPN INFO PPTPS CTRL: Client pppd finish wait
Sep 18 20:00:22 OTHER INFO Mail successfully.
Sep 18 23:12:13 VPN ERROR PPTPS MGR: dropped small initial connection
Sep 18 23:12:13 VPN ERROR PPTPS MGR: dropped small initial connection
Sep 18 23:12:14 VPN WARNING PPTPS MGR: initial packet length 18245 outside (0 - 220)
Sep 19 15:45:51 VPN INFO PPTPS CTRL: Client 77.43.90.225 control connection started
Sep 19 15:45:51 VPN INFO PPTPS CTRL: Starting call (launching pppd, opening GRE)
Sep 19 15:45:51 PPP INFO sent [LCP Req asyncmap=0x0 auth=chap-MS-v2 magic=0x163e260a pcomp accomp]
Sep 19 15:45:51 PPP INFO rcvd [LCP Req mru=1400 magic=0x7c831920 pcomp accomp callback=CBCP]
Sep 19 15:45:51 PPP INFO sent [LCP Rej callback=CBCP]
Sep 19 15:45:51 PPP INFO rcvd [LCP Req mru=1400 magic=0x7c831920 pcomp accomp]
Sep 19 15:45:51 PPP INFO sent [LCP Ack mru=1400 magic=0x7c831920 pcomp accomp]
Sep 19 15:45:54 PPP INFO sent [LCP Req asyncmap=0x0 auth=chap-MS-v2 magic=0x163e260a pcomp accomp]
Sep 19 15:45:54 PPP INFO rcvd [LCP Ack asyncmap=0x0 auth=chap-MS-v2 magic=0x163e260a pcomp accomp]
Sep 19 15:45:54 PPP INFO sent [CHAP Challenge (36f0d4103affb9d2825b82854905ca55), name = "pptpd"]
Sep 19 15:45:54 PPP INFO rcvd [LCP code=0xc]
Sep 19 15:45:54 PPP INFO sent [LCP CodeRej]
Sep 19 15:45:54 PPP INFO rcvd [LCP code=0xc]
Sep 19 15:45:54 PPP INFO sent [LCP CodeRej]
Sep 19 15:45:54 PPP INFO rcvd [LCP code=0xc]
Sep 19 15:45:54 PPP INFO sent [LCP CodeRej]
Sep 19 15:45:54 PPP INFO rcvd [CHAP Response (e5afdff5bcb0acb9c4903e5babbe5d4100000000000000003cbd3285202b22e6ac9cfe615297ae0cecc6fadcb423a8a400), name = "cassiopea"]
Sep 19 15:45:54 PPP INFO sent [CHAP Success "S=B3015CEAA551ECE77CE3A3B1E94A03F87C9D6C1C M=Access granted"]
Sep 19 15:45:54 PPP INFO sent [CCP ConfReq mppe +H -M +S -L -D -C]
Sep 19 15:45:54 PPP INFO rcvd [proto=0x8057] 01 05 00 0e 01 0a 98 60 68 9d b6 24 f8 98



Any ideas?
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#5
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Re:Problem PPTP Vpn with TL-R600VPN
2017-09-25 17:10:49 - last edited 2021-08-21 05:52:41
Sep 15 23:12:15 VPN ERROR PPTPS MGR: dropped small initial connection
Sep 15 23:12:16 VPN ERROR PPTPS MGR: dropped small initial connection

It seems the request packets are too small so the router dropped it. Please try to change the MTU value of you client to the same as your PPTP Server's.
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#6
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Re:Problem PPTP Vpn with TL-R600VPN
2017-09-26 15:57:58 - last edited 2021-08-21 05:52:41
OK, i'll try
But i have to change the MTU value in the tp-link or in the windows client?
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#7
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