topic Site to Site VPN with duplicate internal IP address in Network Security https://community.cisco.com/t5/network-security/site-to-site-vpn-with-duplicate-internal-ip-address/m-p/872691#M1024034 <P>I need to set up a site to site vpn but the company I need to set the connection up with needs me to change the ip addresses of the systems that they will connect to due to having the same ip subnet on their end. So for example they want me to mask my 10.0.0.20 to 172.16.0.20 so that they do not have conflicts. Is this possible thru a VPN 3000 Concentrator and if so how would be accomplished. Thank you in advance. </P> Fri, 21 Feb 2020 09:43:55 GMT gtroussel 2020-02-21T09:43:55Z Site to Site VPN with duplicate internal IP address https://community.cisco.com/t5/network-security/site-to-site-vpn-with-duplicate-internal-ip-address/m-p/872691#M1024034 <P>I need to set up a site to site vpn but the company I need to set the connection up with needs me to change the ip addresses of the systems that they will connect to due to having the same ip subnet on their end. So for example they want me to mask my 10.0.0.20 to 172.16.0.20 so that they do not have conflicts. Is this possible thru a VPN 3000 Concentrator and if so how would be accomplished. Thank you in advance. </P> Fri, 21 Feb 2020 09:43:55 GMT https://community.cisco.com/t5/network-security/site-to-site-vpn-with-duplicate-internal-ip-address/m-p/872691#M1024034 gtroussel 2020-02-21T09:43:55Z Re: Site to Site VPN with duplicate internal IP address https://community.cisco.com/t5/network-security/site-to-site-vpn-with-duplicate-internal-ip-address/m-p/872692#M1024035 <HTML><HEAD></HEAD><BODY><P>Yes its possible you need get static NAT in place</P><P>Following guide should be helpful</P><P><A class="jive-link-custom" href="http://www.cisco.com/en/US/products/hw/vpndevc/ps2284/products_configuration_example09186a00800ef7ad.shtml" target="_blank">http://www.cisco.com/en/US/products/hw/vpndevc/ps2284/products_configuration_example09186a00800ef7ad.shtml</A></P><P>M.</P><P>Hope that helps rate if it does</P></BODY></HTML> Mon, 22 Oct 2007 06:28:51 GMT https://community.cisco.com/t5/network-security/site-to-site-vpn-with-duplicate-internal-ip-address/m-p/872692#M1024035 m.sir 2007-10-22T06:28:51Z