LEXXA: si nastav normalni tunnel bez VTI/Tun0 etc. a dej si deny v NAT tabulce uplne nahoru. IMHO jednodussi na propojeni dvou siti, kdyz nepotrebujes zadny dalsi site routovat
ip ipsec
0 address=62.168.x.x/32 local-address=0.0.0.0 passive=no port=500 auth-method=pre-shared-key secret="hablabla" generate-policy=no policy-template-group=default exchange-mode=main
send-initial-contact=yes nat-traversal=yes proposal-check=obey hash-algorithm=sha1 enc-algorithm=aes-128 dh-group=modp1024 lifetime=1d lifebytes=0 dpd-interval=2m dpd-maximum-failures=5
1 src-address=172.16.1.0/24 src-port=any dst-address=172.16.3.0/24 dst-port=any protocol=all action=encrypt level=require ipsec-protocols=esp tunnel=yes sa-src-address=46.234.x.x
sa-dst-address=62.168.x.x proposal=default priority=0
ip nat
1 chain=srcnat action=accept src-address=172.16.1.0/24 dst-address=172.16.6.3/24 log=no log-prefix=""