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Frequent VPN disconnects

E

Eric.chen3742

macrumors member
Original poster
Jul 23, 2018
61
41
After working reliably for the better part of a year, vpnd on my Mac OS server has had frequent disconnects every few minutes for the last few days. I tried restarting both client and server and this has not worked. The logs seem to suggest they aren't replying to each others' pings.

Client:

Sun Jun 23 17:19:39 2019 : no echo-reply, start ppp_auxiliary_probe!
Sun Jun 23 17:19:39 2019 : ppp_ip_probe_send: starting
Sun Jun 23 17:19:39 2019 : ppp_ip_probe_send: found goog-dns address
Sun Jun 23 17:19:39 2019 : ppp_ip_probe_send: sent to goog-dns over scope 4
Sun Jun 23 17:19:39 2019 : ppp_ip_probe_send: found peer address
Sun Jun 23 17:19:39 2019 : ppp_ip_probe_send: sent to peer over scope 4
Sun Jun 23 17:19:39 2019 : ppp_ip_probe_send: no alternate peer address
Sun Jun 23 17:19:39 2019 : ppp_ip_probe_send: 2 probes sent
Sun Jun 23 17:19:39 2019 : ppp_auxiliary_probe[0] response!
Sun Jun 23 17:19:39 2019 : ppp_auxiliary_probe[1] response!
Sun Jun 23 17:19:59 2019 : no echo-reply, despite successful ppp_auxiliary_probe!
Sun Jun 23 17:19:59 2019 : No response to 3 echo-requests
Sun Jun 23 17:19:59 2019 : Serial link appears to be disconnected.
Sun Jun 23 17:19:59 2019 : ipcp: down
Sun Jun 23 17:19:59 2019 : sent [LCP TermReq id=0x3 "Peer not responding"]
Sun Jun 23 17:19:59 2019 : Connection terminated.
Sun Jun 23 17:19:59 2019 : Connect time 2.0 minutes.
Sun Jun 23 17:19:59 2019 : Sent 373049 bytes, received 1896238 bytes.
Sun Jun 23 17:19:59 2019 : L2TP disconnecting...
Sun Jun 23 17:19:59 2019 : L2TP sent CDN
Sun Jun 23 17:19:59 2019 : L2TP sent StopCCN
Sun Jun 23 17:19:59 2019 : L2TP clearing port-mapping for en0
Sun Jun 23 17:19:59 2019 : L2TP disconnected
​
Server:
Sun Jun 23 16:18:50 2019 : Sun Jun 23 16:18:50 2019 : Sun Jun 23 16:18:50 2019 : Sun Jun 23 16:18:50 2019 : l2tp_wait_input: Address deleted. previous interface setting (name: en0, address: 10.0.1.98), deleted interface setting (name: en0, family: Ether, address: 10.0.1.98, subnet: 255.255.255.0, destination: 10.0.1.255).
l2tp_wait_input: Address deleted. previous interface setting (name: en0, address: 10.0.1.98), deleted interface setting (name: en0, family: Ether, address: 10.0.1.98, subnet: 255.255.255.0, destination: 10.0.1.255).
l2tp_wait_input: Address deleted. previous interface setting (name: en0, address: 10.0.1.98), deleted interface setting (name: en0, family: Ether, address: 10.0.1.98, subnet: 255.255.255.0, destination: 10.0.1.255).

Sun Jun 23 16:18:53 2019 : starting wait-interface timer for l2tp: 20 secs
l2tp_wait_input: Address deleted. previous interface setting (name: en0, address: 10.0.1.98), deleted interface setting (name: en0, family: Ether, address: 10.0.1.98, subnet: 255.255.255.0, destination: 10.0.1.255).
Sun Jun 23 16:18:53 2019 : starting wait-interface timer for l2tp: 20 secs
Sun Jun 23 16:18:53 2019 : starting wait-interface timer for l2tp: 20 secs
Sun Jun 23 16:18:53 2019 : starting wait-interface timer for l2tp: 20 secs
Sun Jun 23 16:18:55 2019 : l2tp_wait_input: Address added. previous interface setting (name: en0, address: 10.0.1.98), current interface setting (name: en0, family: Ether, address: 10.0.1.98, subnet: 255.255.255.0, destination: 10.0.1.255).
Sun Jun 23 16:18:55 2019 : l2tp_wait_input: Address added. previous interface setting (name: en0, address: 10.0.1.98), current interface setting (name: en0, family: Ether, address: 10.0.1.98, subnet: 255.255.255.0, destination: 10.0.1.255).
Sun Jun 23 16:18:55 2019 : l2tp_wait_input: Address added. previous interface setting (name: en0, address: 10.0.1.98), current interface setting (name: en0, family: Ether, address: 10.0.1.98, subnet: 255.255.255.0, destination: 10.0.1.255).Sun Jun 23 16:18:55 2019 : l2tp_wait_input: Address added. previous interface setting (name: en0, address: 10.0.1.98), current interface setting (name: en0, family: Ether, address: 10.0.1.98, subnet: 255.255.255.0, destination: 10.0.1.255).

Sun Jun 23 16:19:55 2019 : Sun Jun 23 16:19:55 2019 : Sun Jun 23 16:19:55 2019 : Sun Jun 23 16:19:55 2019 : l2tp_wait_input: Address deleted. previous interface setting (name: en0, address: 10.0.1.98), deleted interface setting (name: en0, family: Ether, address: 10.0.1.98, subnet: 255.255.255.0, destination: 10.0.1.255).
l2tp_wait_input: Address deleted. previous interface setting (name: en0, address: 10.0.1.98), deleted interface setting (name: en0, family: Ether, address: 10.0.1.98, subnet: 255.255.255.0, destination: 10.0.1.255).
l2tp_wait_input: Address deleted. previous interface setting (name: en0, address: 10.0.1.98), deleted interface setting (name: en0, family: Ether, address: 10.0.1.98, subnet: 255.255.255.0, destination: 10.0.1.255).
l2tp_wait_input: Address deleted. previous interface setting (name: en0, address: 10.0.1.98), deleted interface setting (name: en0, family: Ether, address: 10.0.1.98, subnet: 255.255.255.0, destination: 10.0.1.255).
Sun Jun 23 16:19:57 2019 : starting wait-interface timer for l2tp: 20 secs
Sun Jun 23 16:19:57 2019 : starting wait-interface timer for l2tp: 20 secs
Sun Jun 23 16:19:57 2019 : starting wait-interface timer for l2tp: 20 secs
Sun Jun 23 16:19:57 2019 : starting wait-interface timer for l2tp: 20 secs
Sun Jun 23 16:20:00 2019 : l2tp_wait_input: Address added. previous interface setting (name: en0, address: 10.0.1.98), current interface setting (name: en0, family: Ether, address: 10.0.1.98, subnet: 255.255.255.0, destination: 10.0.1.255).
Sun Jun 23 16:20:00 2019 : l2tp_wait_input: Address added. previous interface setting (name: en0, address: 10.0.1.98), current interface setting (name: en0, family: Ether, address: 10.0.1.98, subnet: 255.255.255.0, destination: 10.0.1.255).
Sun Jun 23 16:20:00 2019 : l2tp_wait_input: Address added. previous interface setting (name: en0, address: 10.0.1.98), current interface setting (name: en0, family: Ether, address: 10.0.1.98, subnet: 255.255.255.0, destination: 10.0.1.255).
Sun Jun 23 16:20:00 2019 : l2tp_wait_input: Address added. previous interface setting (name: en0, address: 10.0.1.98), current interface setting (name: en0, family: Ether, address: 10.0.1.98, subnet: 255.255.255.0, destination: 10.0.1.255).
Sun Jun 23 16:21:01 2019 : Sun Jun 23 16:21:01 2019 : Sun Jun 23 16:21:01 2019 : Sun Jun 23 16:21:01 2019 :
l2tp_wait_input: Address deleted. previous interface setting (name: en0, address: 10.0.1.98), deleted interface setting (name: en0, family: Ether, address: 10.0.1.98, subnet: 255.255.255.0, destination: 10.0.1.255).
l2tp_wait_input: Address deleted. previous interface setting (name: en0, address: 10.0.1.98), deleted interface setting (name: en0, family: Ether, address: 10.0.1.98, subnet: 255.255.255.0, destination: 10.0.1.255).
l2tp_wait_input: Address deleted. previous interface setting (name: en0, address: 10.0.1.98), deleted interface setting (name: en0, family: Ether, address: 10.0.1.98, subnet: 255.255.255.0, destination: 10.0.1.255).
Sun Jun 23 16:21:04 2019 : starting wait-interface timer for l2tp: 20 secs
Sun Jun 23 16:21:04 2019 : starting wait-interface timer for l2tp: 20 secs
l2tp_wait_input: Address deleted. previous interface setting (name: en0, address: 10.0.1.98), deleted interface setting (name: en0, family: Ether, address: 10.0.1.98, subnet: 255.255.255.0, destination: 10.0.1.255).Sun Jun 23 16:21:04 2019 :
starting wait-interface timer for l2tp: 20 secs
Sun Jun 23 16:21:04 2019 : starting wait-interface timer for l2tp: 20 secs
Sun Jun 23 16:21:06 2019 : l2tp_wait_input: Address added. previous interface setting (name: en0, address: 10.0.1.98), current interface setting (name: en0, family: Ether, address: 10.0.1.98, subnet: 255.255.255.0, destination: 10.0.1.255).
Sun Jun 23 16:21:06 2019 : l2tp_wait_input: Address added. previous interface setting (name: en0, address: 10.0.1.98), current interface setting (name: en0, family: Ether, address: 10.0.1.98, subnet: 255.255.255.0, destination: 10.0.1.255).
Sun Jun 23 16:21:06 2019 : l2tp_wait_input: Address added. previous interface setting (name: en0, address: 10.0.1.98), current interface setting (name: en0, family: Ether, address: 10.0.1.98, subnet: 255.255.255.0, destination: 10.0.1.255).
Sun Jun 23 16:21:06 2019 : l2tp_wait_input: Address added. previous interface setting (name: en0, address: 10.0.1.98), current interface setting (name: en0, family: Ether, address: 10.0.1.98, subnet: 255.255.255.0, destination: 10.0.1.255).
Sun Jun 23 16:21:26 2019 : No response to 5 echo-requests
Sun Jun 23 16:21:26 2019 :
Serial link appears to be disconnected.
Sun Jun 23 16:21:26 2019 : ipcp: down
Sun Jun 23 16:21:26 2019 : l2tp_wait_input: Address deleted. previous interface setting (name: en0, address: 10.0.1.98), deleted interface setting (name: ppp0, family: PPP, address: 108.255.198.102, subnet: 255.0.0.0, destination: 10.0.1.242).
Sun Jun 23 16:21:26 2019 : l2tp_wait_input: Address deleted. previous interface setting (name: en0, address: 10.0.1.98), deleted interface setting (name: ppp0, family: PPP, address: 108.255.198.102, subnet: 255.0.0.0, destination: 10.0.1.242).
Sun Jun 23 16:21:26 2019 : l2tp_wait_input: Address deleted. previous interface setting (name: en0, address: 10.0.1.98), deleted interface setting (name: ppp0, family: PPP, address: 108.255.198.102, subnet: 255.0.0.0, destination: 10.0.1.242).
Sun Jun 23 16:21:26 2019 : sent [LCP TermReq id=0x3 "Peer not responding"]
Sun Jun 23 16:21:26 2019 : Connection terminated.
Sun Jun 23 16:21:26 2019 : Connect time 9.9 minutes.
Sun Jun 23 16:21:26 2019 : Sent 5104859 bytes, received 666157 bytes.
Sun Jun 23 16:21:26 2019 : L2TP disconnecting...
Sun Jun 23 16:21:26 2019 : L2TP sent CDN
Sun Jun 23 16:21:26 2019 : L2TP sent StopCCN
Sun Jun 23 16:21:26 2019 : L2TP disconnected
2019-06-23 16:21:26 PDT --> Client with address = 10.0.1.242 has hungup
​
There has been no recent changes to the client or the server, or the networks they're on. Any idea what could cause this or fix this?
 
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