https://community.hpe.com/t5/communications-and-wireless/compatibility-between-ipsec-2-00-and-nat-network-translation/m-p/3432268#M3485 Hi<BR />ESP doesn't change the IP header, only if it is configured in tunnel mode.<BR />Even in this case there should be no problem with your NAT addresses.<BR />Good luck<BR />Jorge Tue, 30 Nov 2004 05:24:47 GMT Jorge Pinto Leite 2004-11-30T05:24:47Z https://community.hpe.com/t5/communications-and-wireless/compatibility-between-ipsec-2-00-and-nat-network-translation/m-p/3432267#M3484 Hi ,<BR /><BR />i would like to install and configure IPSec 2.00 on my hpux 11.11 server in order to communicate with a distant customer (probably a hpux 11.11 server too), our network is based on a NAT (network translation address) structure . I think that IPSec use a ESP protocol which is changing the header of UDP/TCP !! Is it a problem for my NAT ?Thanks<BR /> Mon, 29 Nov 2004 11:36:11 GMT https://community.hpe.com/t5/communications-and-wireless/compatibility-between-ipsec-2-00-and-nat-network-translation/m-p/3432267#M3484 Juquin_3 2004-11-29T11:36:11Z https://community.hpe.com/t5/communications-and-wireless/compatibility-between-ipsec-2-00-and-nat-network-translation/m-p/3432268#M3485 Hi<BR />ESP doesn't change the IP header, only if it is configured in tunnel mode.<BR />Even in this case there should be no problem with your NAT addresses.<BR />Good luck<BR />Jorge Tue, 30 Nov 2004 05:24:47 GMT https://community.hpe.com/t5/communications-and-wireless/compatibility-between-ipsec-2-00-and-nat-network-translation/m-p/3432268#M3485 Jorge Pinto Leite 2004-11-30T05:24:47Z