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what port IE uses

By allen ·
I need to secure a web server runing IIS5.0 by closing some ports. the problem is I need to use IE for downloading updates. does any one know what port IE uses?

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what port IE uses

by Some Guy in Seattle In reply to what port IE uses

IE will use whatever port you want. It will default to port 80 (http) if you type a URL into the address space. If you want to use SSL (HTTPS), prefix the URL with HTTPS, or FTP if yo want to use FTP. If you want to use any other port, append a colon with the port number to the end of the URL (e.g. www.blah.com:8080).

You may be a little confused as to securing an IIS server. Using IE to download updates is an OUTBOUND process (from the perspective of the machine). Serving web pages with IIS is an INBOUND process. If you want to serve pages you cannot close the ports that other machines need. You are on the right track for downloading patches to fix issues within the HTTP protocol, but this is not a matter of closing outbound ports since the two aren't directly related.

Hope that helps -

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what port IE uses

by allen In reply to what port IE uses

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what port IE uses

by Jeff Adams In reply to what port IE uses

As Some Guy In Seattle, noted, there are inbound and outbound connections. Using IE to download updates initiates outbound connections. Using IIS to serve documents utilizes inbound connections.

To secure your IIS server, start by stopping all non-critical services (which in itself can close multiple ports) on the server. If you are strictly serving pages on the default port, then port 80 will need to be left open. If you are serving secure pages (HTTPS), port 443 will need to be left open.

If you are not using the server for mail services (which are part of IIS), make sure SMTP and POP services are not running (thus closing ports 25 and 110).

If you are not using the server for FTP services (which is part of IIS), make sure the FTP service is not running (thus closing ports 20 and 21).

You can get a listing of open ports by issuing a "netstat -a" from a command prompt. All open ports should be reviewed for functionality and security implications.

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what port IE uses

by allen In reply to what port IE uses

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