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Помогите найти причину разрыва VPN


yaparadox
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Подскажите пожалуйста где копать.

На даче настроил мобильный интернет через роутер + модем, подключил к домашнему Zyxel Omni II  v2.09(AAUS.5)A3 через VPN, но соединение периодически обрывается.

Feb 19 11:00:40pptpd[2772]CTRL: Reaping child PPP[2773]
Feb 19 11:00:40pptpd[2772]CTRL: Client pppd TERM sending
Feb 19 11:00:40pptpd[2772]CTRL: Client pppd finish wait
Feb 19 11:00:40pptp[2773]Modem hangup
Feb 19 11:00:40pptp[2773]Connect time 717.3 minutes.
Feb 19 11:00:40pptp[2773]Sent 397195026 bytes, received 21994361 bytes.
Feb 19 11:00:40pptp[2773]MPPE disabled
Feb 19 11:00:40pptp[2773]Connection terminated.
Feb 19 11:00:40ndmkernel: Fast VPN ctrl: release for src 83.220.238.47
Feb 19 11:00:41pptp[2773]Terminating on signal 15
Feb 19 11:00:41pptp[2773]Exit.
Feb 19 11:00:41pptpd[2772]CTRL: Client 83.220.238.47 control connection finished
Feb 19 11:02:05pptpd[5385]CTRL: Client 83.220.238.47 control connection started
Feb 19 11:02:06ndmkernel: Fast VPN ctrl: setup for src 83.220.238.47
Feb 19 11:02:06pptpd[5385]CTRL: Starting call (launching pppd, opening GRE)
Feb 19 11:02:06pptp[5387]Plugin pptp.so loaded.
Feb 19 11:02:06pptp[5387]PPTP plugin version 0.8.3 compiled against pppd 2.4.4-4
Feb 19 11:02:06pptp[5387]pppd 2.4.4-4 started by root, uid 0
Feb 19 11:02:06pptp[5387]Using interface vpn1
Feb 19 11:02:06pptp[5387]Connect: vpn1 <--> pptp (83.220.238.47)
Feb 19 11:02:07pptp[5387]MPPE 128-bit stateless compression enabled
Feb 19 11:02:10pptp[5387]local  IP address 192.168.1.1
Feb 19 11:02:10pptp[5387]remote IP address 172.16.1.33

Подскажите, где искать причину на клиенте или сервере?

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8 минут назад, yaparadox сказал:

Подскажите пожалуйста где копать.

На даче настроил мобильный интернет через роутер + модем, подключил к домашнему Zyxel Omni II  v2.09(AAUS.5)A3 через VPN, но соединение периодически обрывается.


Feb 19 11:00:40pptpd[2772]CTRL: Reaping child PPP[2773]
Feb 19 11:00:40pptpd[2772]CTRL: Client pppd TERM sending
Feb 19 11:00:40pptpd[2772]CTRL: Client pppd finish wait
Feb 19 11:00:40pptp[2773]Modem hangup
Feb 19 11:00:40pptp[2773]Connect time 717.3 minutes.
Feb 19 11:00:40pptp[2773]Sent 397195026 bytes, received 21994361 bytes.
Feb 19 11:00:40pptp[2773]MPPE disabled
Feb 19 11:00:40pptp[2773]Connection terminated.
Feb 19 11:00:40ndmkernel: Fast VPN ctrl: release for src 83.220.238.47
Feb 19 11:00:41pptp[2773]Terminating on signal 15
Feb 19 11:00:41pptp[2773]Exit.
Feb 19 11:00:41pptpd[2772]CTRL: Client 83.220.238.47 control connection finished
Feb 19 11:02:05pptpd[5385]CTRL: Client 83.220.238.47 control connection started
Feb 19 11:02:06ndmkernel: Fast VPN ctrl: setup for src 83.220.238.47
Feb 19 11:02:06pptpd[5385]CTRL: Starting call (launching pppd, opening GRE)
Feb 19 11:02:06pptp[5387]Plugin pptp.so loaded.
Feb 19 11:02:06pptp[5387]PPTP plugin version 0.8.3 compiled against pppd 2.4.4-4
Feb 19 11:02:06pptp[5387]pppd 2.4.4-4 started by root, uid 0
Feb 19 11:02:06pptp[5387]Using interface vpn1
Feb 19 11:02:06pptp[5387]Connect: vpn1 <--> pptp (83.220.238.47)
Feb 19 11:02:07pptp[5387]MPPE 128-bit stateless compression enabled
Feb 19 11:02:10pptp[5387]local  IP address 192.168.1.1
Feb 19 11:02:10pptp[5387]remote IP address 172.16.1.33

Подскажите, где искать причину на клиенте или сервере?

Если на всех версиях прошивок так работает, то я бы стал искать причину в провайдере сотового Интернета и его особенностях NAT для PPTP/GRE.

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Была ситуация с аналогичной схемой. 

Тогда было подмечено, что PPTP VPN рвался при нагрузке на канал.

Проблема оказалась в том, что к VPN клиенту был подключен старый 3G модем (Huawei E1550), у которого upstream по спецификации всего 380 Кбит/с.

Все решилось после замены модема на более современный с HSUPA.

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