Add support for CISCO kompartibles VPN (user by FRITZBox).

conf/default_ports.conf

@@ -31,6 +31,11 @@ standard_print_raw_port=515
 standard_print_port=9100
 standard_remote_console_port=5900
 
+# - IPsec - Internet Security Association and
+# -  Key Management Protocol
+standard_isakmp_port=500
+standard_ipsec_nat_t=4500
+
 
 # - Comma separated lists
 # -