l2tp ipsec VPN Error Sep 12 18:16:25 vps pluto[7299]: ERROR: asynchronous network error report on eth0 (sport=500) for message to 192.5.6.2 port 20640, complainant 192.5.6.2: Connection refused [errno 111, origin ICMP type 3 code 3 (not authenticated

Sep 12 18:16:25 vps pluto[7299]: ERROR: asynchronous network error report on eth0 (sport=500) for message to 192.5.6.2 port 20640, complainant 192.5.6.2: Connection refused [errno 111, origin ICMP type 3 code 3 (not authenticated)]

Some say changing the "leftprotoport=17/%any" will fix this but I have not found this to be the case.

Essentially it means at least one end is blocking the ipsec packets.  Sometimes the %any allows an alternative port to be used for smart clients but generally I have not seen this fix problems (especially if a network or country is intentionally blocking ipsec packets).

 

 

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