Port Blocking

[Guest]

Hi There,

I want to use TCP/IP filtering and block all the porst
that i may not need to have open on my win2000 server web
server. I am running the following on my web server.

Cold Fusion Server, Crystal Enterprise 8.5, FoxPro7, SQL
Server 2000, and Mdaemon Pro mail server.

I have 2 servers, server A and server B. Server B gets
data from a Fox DB on server A. Server A hosts my
website, and it also writes data into a SQL DB.

Could someone please tell me which ports I need open for
my 2 servers based on the apps and services i use? I want
to block all except the one s i need to use. If you need
more info, pls e-mail me at (e-mail address removed).

 

[Jeff Cochran]

I want to use TCP/IP filtering and block all the porst
that i may not need to have open on my win2000 server web
server. I am running the following on my web server.

Wrong move on two fronts. First, never block ports you don't need,
instead open only the ports you need.

Second, this is best done in your firewall and not TCP/IP filtering.

Cold Fusion Server, Crystal Enterprise 8.5, FoxPro7, SQL
Server 2000, and Mdaemon Pro mail server.

I have 2 servers, server A and server B. Server B gets
data from a Fox DB on server A. Server A hosts my
website, and it also writes data into a SQL DB.

Could someone please tell me which ports I need open for
my 2 servers based on the apps and services i use? I want
to block all except the one s i need to use. If you need
more info, pls e-mail me at (e-mail address removed).

Easiest is block everything and review the firewall logs for what's
being blocked. Also check the port list:

http://www.iana.org/assignments/port-numbers

Jeff

 

[Steven L Umbach]

I agree with Jeff and here is another link that is more Microsoft specific that
should help. --- Steve

http://support.microsoft.com/default.aspx?scid=kb;en-us;832017

 

[Guest]

-----Original Message-----
Hi There,

I want to use TCP/IP filtering and block all the porst
that i may not need to have open on my win2000 server web
server. I am running the following on my web server.

Cold Fusion Server, Crystal Enterprise 8.5, FoxPro7, SQL
Server 2000, and Mdaemon Pro mail server.

I have 2 servers, server A and server B. Server B gets
data from a Fox DB on server A. Server A hosts my
website, and it also writes data into a SQL DB.

Could someone please tell me which ports I need open for
my 2 servers based on the apps and services i use? I want
to block all except the one s i need to use. If you need
more info, pls e-mail me at (e-mail address removed).
.

On your web server you may need two network card, one
facing the the internet / intranet which has port
filtering and the other of the internal network , allowing
full communication with your other servers. to find out
what ports are being used, look in you \system32
\drivers\etc directory for a file called "services", this
will have alisting of the ports being used, as for you the
oher apps, the manauls should provide this information or
their website. good luck

 

[Karl Levinson [x y] mvp]

On your web server you may need two network card, one
facing the the internet / intranet which has port
filtering and the other of the internal network , allowing
full communication with your other servers.

Don't do this. You will bypass your firewall and weaken the security on
your network. Besides, it's not necessary to do this, one network card is
sufficient.

to find out what ports are being used, look in you \system32
\drivers\etc directory for a file called "services", this
will have alisting of the ports being used,

Actually, that list doesn't accurately indicate what ports are being used.
Watching the firewall logs is much more useful here IMHO.