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Network Address Translation - pfSense Hangout July 2014
1. July 2014 Hang Out
Network Address Translation
Chris Buechler
2. Project News
● First training complete
● Next coming up
○ September 5-6
○ In-person, in Austin, Texas
○ https://www.pfsense.org/university/
● 2.1.5 release coming soon
● FW-7551 now available @ store.pfsense.org
● Free Gold subscription with support-bundled
hardware purchase in August
3. Network Address Translation
● Modification of IP packet header
● Replacement of:
○ source and/or destination IP
○ source and/or destination port for TCP and UDP
● Common uses
○ Internet access
○ Connection of conflicting networks
○ Working around routing issues
● Not a security mechanism
10. 1:1 NAT
● Mapping of one internal to one external IP
○ inbound and outbound
● Also for entire subnets
○ where equal size and sequential IPs
● Per-interface basis
● Optionally limited to specific destinations