The vRouter NAT 6-4 translator supports the following:

• TCP and UDP protocols and Internet Control Message Protocol (ICMP) echo requests.
  Note: ICMP is supported only for echo requests and responses.
• Working with firewalls (stateful and stateless).
• Working with DNAT and SNAT.
• Address formats as specified in section 2.2 of RFC 6052.
• Stateful connection tracking and validation (by way of the NPF session table).
• Selective packet filtering of source and destination prefixes on the inbound interface of the IPv6 network.