04[NET] error writing to socket: Permission denied

[marcfunk]

Hello all!

We have 3 brand new Base 4200 and config IP-Sec between all Bases.

Base #1 = 192.168.40.254
Base #2 = 192.168.50.254
Base #3 = 192.168.110.254

Alle bases have a FritzBox as modem with port forwarding for ESP, UDP 500 and UDP 4500.

Base #1 and Base #2 can connect each other,
Base #1 and Base #3 cannot connect.
Base #2 and Base #3 cannon connect.

In der System Log at Base #3 there is following logged:

Nov 3 12:43:25 	charon 	68723 	10[IKE] <con1|1> retransmit 1 of request with message ID 0
Nov 3 12:43:25 	charon 	68723 	10[NET] <con1|1> sending packet: from 192.168.xx.xx[500] to 109.xx.xx.xx[500] (500 bytes)
Nov 3 12:43:25 	charon 	68723 	04[NET] error writing to socket: Permission denied
Nov 3 12:43:26 	charon 	68723 	14[CFG] vici client 30 disconnected
Nov 3 12:43:30 	charon 	68723 	14[CFG] vici client 32 connected
Nov 3 12:43:30 	charon 	68723 	10[CFG] vici client 32 registered for: list-sa
Nov 3 12:43:30 	charon 	68723 	14[CFG] vici client 32 requests: list-sas
Nov 3 12:43:30 	charon 	68723 	10[CFG] vici client 32 disconnected
Nov 3 12:43:33 	charon 	68723 	14[IKE] <con1|1> retransmit 2 of request with message ID 0
Nov 3 12:43:33 	charon 	68723 	14[NET] <con1|1> sending packet: from 192.168.xx.xx[500] to 109.xx.xx.xx[500] (500 bytes)
Nov 3 12:43:33 	charon 	68723 	04[NET] error writing to socket: Permission denied  

I have reset the Base #3 and config it completely new. Also i have renew the config of ipsec tun on both sides. But he still write "error writing to socket".
In the past there was errors like this, but there wasn't really a solution.