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August 29 2011

finkregh

NAT64 RFCs Published Last Week - Packet Life

Tags: ipv6 nat net64

August 10 2010

finkregh

IPv6 Network Address Translation - Packet Life

Renumbering Avoidance

Use: Without NAT, an organization which has addressed its network using provider-assigned (PA) public address space must re-address its entire network if it desires to switch to a new upstream provider. This is obviously an incredibly labor-intensive, lengthy, and disruptive procedure. To avoid this, many organizations address their internal structure from private RFC 1918 address space and NAT to public addresses at edge routers. Should they need to switch to a new provider, only the NAT translations rules must be changed.

Alternative: Organizations which utilize provider-independent (PI) address space (which is allocated directly from a registry) are not affected by this, as switching to a different upstream provider does not require renumbering. However, the use of PI address space contributes to growth in the global routing table.
Tags: ipv6 nat
finkregh

IPv6 Network Address Translation - Packet Life

Renumbering Avoidance

Use: Without NAT, an organization which has addressed its network using provider-assigned (PA) public address space must re-address its entire network if it desires to switch to a new upstream provider. This is obviously an incredibly labor-intensive, lengthy, and disruptive procedure. To avoid this, many organizations address their internal structure from private RFC 1918 address space and NAT to public addresses at edge routers. Should they need to switch to a new provider, only the NAT translations rules must be changed.

Alternative: Organizations which utilize provider-independent (PI) address space (which is allocated directly from a registry) are not affected by this, as switching to a different upstream provider does not require renumbering. However, the use of PI address space contributes to growth in the global routing table.
Tags: ipv6 nat

April 08 2010

finkregh

pwnat - NAT to NAT client-server communication

pwnat, pronounced "poe-nat", is a tool that allows any number of clients behind NATs to communicate with a server behind a separate NAT with *no* port forwarding and *no* DMZ setup on any routers in order to directly communicate with each other. The server does not need to know anything about the clients trying to connect. Simply put, this is a proxy server that works behind a NAT, even when the client is behind a NAT, without any 3rd party.
Tags: nat networking security tunneling udp
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