Thanks guys, but I'm still unclear about these ISP telling me that a static IP is more secure. Seems to me as though it is less secure
Your logic makes sense to me as well...so I went to SBC's website and found this:
Some Internet applications, however, require a different type of Internet connection for those applications that require 24x7 availability (like a web server or email server). So a benefit of having a static IP address is that it enables this type of 24x7 connection for those applications that require it. With a static IP, the way you disconnect your SBC Yahoo! DSL connection is either by turning off your computer, or unplugging your modem or router.
Of course, with this type of always-on connection, many customers will require a higher level of protection for their SBC Yahoo! DSL connection. This can usually be addressed by simply installing a router instead of a modem. This specific topic is addressed later in this material.
The benefits of running SBC Yahoo! DSL with a router include:
* Being able to connect multiple computers to the DSL line; this enables customers to have multiple, simultaneous connections to the Internet. For example, a small office could connect three or four of their computers to the router, thereby providing each computer with access to the Internet over the same DSL line.
* Improving the security of the SBC Yahoo! DSL connection, since the router runs on a protocol called "Network Address Translation" (NAT). NAT enables each of the connected computers to have their own "private" IP address, which is different from the "public" static IP address that is assigned to the router. By assigning private IP addresses to each computer connected to the router, hackers are not able to see these IP addresses or gain access to any data on these computers. This protects these computers by essentially making them "invisible" to everyone on the Internet.
Basically, I think what it is saying is that the connection is more secure with static IPs because there is typically a router protecting you from hackers (as opposed to a modem, which is basically no protection). It does this, as it says, by hiding the IP address of your computers/servers, and only shows the public address of the router.
Seems like it would be something for a large scale company to worry about.