To have IPSec VPN two ports are essential - 500 and 50
Port Numbers
Just use this program Server and Domain Isolation Using IPsec and Group Policy Basta utilizar este programa Server and Domain Isolation Using IPsec and Group Policy
To test the IPSec policies, use IPSec Monitor. IPSec Monitor (Ipsecmon.exe) provides information about which IPSec policy is active and whether a secure channel between computers is established.
IPSec is a set of IP extensions that provide security services, such as encryption,authentication, and data integrity. IPSec is typically used with a VPN.
The answer to this question depends entirely on the web server software you are using. Generally, however, there is a configuration setting that controls the port number. Check the manual or configuration files for the exact place to change the port number.
There are two modes for IPSec. Transport mode and Tunnel mode. Transport mode is for securing end-to-end communication between two computers and tunnel mode is for securing gateway-to-gateway communication. Refer the following links for more info. http://www.omnisecu.com/security/ipsec/ipsec-transport-mode.htm http://www.omnisecu.com/security/ipsec/ipsec-tunnel-mode.htm
one, two, four or eight
IPsec Short for IP Security, is a set of protocols developed by the IETF to support secure exchange of packets at the IP layer. IPsec has been deployed widely to implement Virtual Private Networks (VPNs). IPsec supports two encryption modes: Transport and Tunnel. IPsec to work, the sending and receiving devices must share a public key.
There are several port cities in Canada, including Vancouver, Halifax, Montreal, Toronto, and Quebec City. The exact number of port cities may vary depending on the definition of "port city" and the scope of the geography being considered.
IP Security Protocol (IPSec)
IPsec (IP security) is a suite of protocols for securing Internet Protocol (IP) communications by authenticating and/or encrypting each IP packet in a data stream. IPsec also includes protocols for cryptographic key establishment.
VPN