Problemas com o PiVPN

[niculae]

instalei o PiVPN como indica neste https://pplware.sapo.pt/linux/pivpn-fcil-transformar-o-raspberry-pi-num-servidor-de-vpns/

contudo estou com um problema nos port forwarding.

se na GW colocar o ip da eth0 (192.168.1.2), funciona bem, mas se colocar a da wlan0 (192.168.1.3), não funciona. 

ambas as interfaces acedem a internet
pi@bpereirapi:~ $ ping -I eth0 8.8.8.8
PING 8.8.8.8 (8.8.8.8) from 192.168.1.2 eth0: 56(84) bytes of data.
64 bytes from 8.8.8.8: icmp_seq=1 ttl=48 time=39.6 ms
64 bytes from 8.8.8.8: icmp_seq=2 ttl=48 time=39.2 ms
^C
--- 8.8.8.8 ping statistics ---
2 packets transmitted, 2 received, 0% packet loss, time 1001ms
rtt min/avg/max/mdev = 39.294/39.449/39.605/0.252 ms
pi@bpereirapi:~ $ ping -I wlan0 8.8.8.8   
PING 8.8.8.8 (8.8.8.8) from 192.168.1.3 wlan0: 56(84) bytes of data.
64 bytes from 8.8.8.8: icmp_seq=1 ttl=48 time=40.6 ms
64 bytes from 8.8.8.8: icmp_seq=2 ttl=48 time=46.4 ms


see the man page entry for --no-replay and --replay-window for more info or silence this warning with --mute-replay-warnings
Fri Jun 23 15:39:41 2017 83.223.248.133:31482 TLS Error: incoming packet authentication failed from [AF_INET]83.223.248.133:31482
Fri Jun 23 15:39:43 2017 83.223.248.133:31482 Authenticate/Decrypt packet error: bad packet ID (may be a replay): [ #1 / time = (1498228773) Fri Jun 23 15:39:33 2017 ] -- see the man page entry for --no-replay and --replay-window for more info or silence this warning with --mute-replay-warnings
Fri Jun 23 15:39:43 2017 83.223.248.133:31482 TLS Error: incoming packet authentication failed from [AF_INET]83.223.248.133:31482
Fri Jun 23 15:39:45 2017 83.223.248.133:31403 TLS Error: TLS key negotiation failed to occur within 60 seconds (check your network connectivity)
Fri Jun 23 15:39:45 2017 83.223.248.133:31403 TLS Error: TLS handshake failed
Fri Jun 23 15:39:55 2017 83.223.248.133:31360 TLS Error: TLS key negotiation failed to occur within 60 seconds (check your network connectivity)
Fri Jun 23 15:39:55 2017 83.223.248.133:31360 TLS Error: TLS handshake failed
Fri Jun 23 15:40:05 2017 83.223.248.133:31381 TLS Error: TLS key negotiation failed to occur within 60 seconds (check your network connectivity)
Fri Jun 23 15:40:05 2017 83.223.248.133:31381 TLS Error: TLS handshake failed
Fri Jun 23 15:40:15 2017 83.223.248.133:31453 TLS Error: TLS key negotiation failed to occur within 60 seconds (check your network connectivity)
Fri Jun 23 15:40:15 2017 83.223.248.133:31453 TLS Error: TLS handshake failed
Fri Jun 23 15:40:25 2017 83.223.248.133:31441 TLS Error: TLS key negotiation failed to occur within 60 seconds (check your network connectivity)
Fri Jun 23 15:40:25 2017 83.223.248.133:31441 TLS Error: TLS handshake failed
Fri Jun 23 15:40:35 2017 83.223.248.133:31482 TLS Error: TLS key negotiation failed to occur within 60 seconds (check your network connectivity)
Fri Jun 23 15:40:35 2017 83.223.248.133:31482 TLS Error: TLS handshake failed

alguma ideia? 

obrigado