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Barracuda CloudGen Firewall

Supported IPv6 Standards

  • Last updated on

The CloudGen Firewall supports several IPv6 standards that are based on RFCs. See the table below for further details.

IPv4 to IPv6 and IPv6 to IPv4 NAT

Network address translation (NAT) from IPv4 to IPv6 and from IPv6 to IPv4 is not supported.

IPv6 Supported Standards

IPv6 StandardRFCs
IPv6 Basic specificationRFC2460
IPv6 Addressing ArchitectureRFC4291
Default Address SelectionRFC3484
Deprecation of Type 0 Routing Headers in IPv6RFC5095
Inspecting IPv6-in-IPv4 protocol-41 traffic, only as part of......RFC4213
Router-Alert optionRFC2711
Path MTU DiscoveryRFC1981
Neighbor DiscoveryRFC4861
BGP4 protocolRFC4271, RFC1772, RFC4760, RFC2545
Dynamic Internal Gateway Protocol (IGP)RFC2080 (RIPng), RFC5340 (OSPF-v3)
Authentication/Confidentiality for OSPFv3RFC4552
QoSRFC2474, RFC3140
Basic Transition Mechanisms for IPv6 Hosts and RoutersRFC4213
IPv6 Router Advertisement Options for DNS ConfigurationRFC6106
BGP Communities AttributeRFC1997
BGP Capabilities Advertisement WITH-4RFC3392
IPsec/IKEv2 (IPv6 listen-address and IPv4 payload)RFC4301, RFC4303, RFC4302, RFC5996
Using IPsec to Secure IPv6-in-IPv4 Tunnels (IKEv2 with ipv6 payload)RFC4891
SNMP protocolRFC3411
SNMP capabilitiesRFC3412, RFC3413, RFC3414


  • IP
  • Forwarding
  • DiffServ


DNS extensions to support IPv6RFC3596
DNS message extension mechanismRFC2671
DNS message size requirementsRFC3226
Using IPSec to Secure IPv6-in-IPv4 TunnelsRFC4891
Default Router Preferences and More-Specific RoutesRFC4191
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