DNS uses tcp&udp port 53 (not 42) as a destination and the source is usually also 53, but could be anything.
Rob :-) > -----Original Message----- > From: [EMAIL PROTECTED] > [mailto:[EMAIL PROTECTED] Behalf Of jhon wong > Sent: Saturday, September 27, 2003 12:12 PM > To: [EMAIL PROTECTED] > Subject: [xmail] Re: question about RDNS > > > Francis, > Thanks for your guide. I am not familer with firewall setting. > So I asking you more question here.If my server is only used > as POP3,SMTP,WWW server, and additionally terminal service. > I plan to set up Input Filter as following: > protocol: TCP(destination port: 25,110,80,3389) > TCP(established) > UDP(source port : 42)for dns > > Is that OK? and NetBIOS will not exist,right? > > > > > > - option 3 : 'BETTER' solution : install Routing and RAS (included in > > windows 2k server) (minimum the routing part) > > To install routing and ras, launch 'Routing and Remote access' console > > manager from administrative tools > > Select your server, right clic it and select 'install/configure rras' > > Choose 'routing' only > > When it become installed and running, in the rras mmc console, go to > > 'General' in 'IP routing', you will see your connexions > > Right click the internet connexion > > In the 'General' tab you have two button : Input filters and Output = > > filters > > Select if you want 'allow all except' or 'deny all except' (it is here = > > the > > 'basic' functionnality, you just can't mix allow and deny, but if you = > > put > > good rules here, you have a perfect firewall at final setup!!) > > > > Even if i currently have a separate firewall running, i allway used = > > this > > feature to protect my exposed w2k systems (do you fully trust you = > > firewall ? > > is your firewall allways secure ? or don't have bugs ...) > > > > Francis > > > > > > > > - > To unsubscribe from this list: send the line "unsubscribe xmail" in > the body of a message to [EMAIL PROTECTED] > For general help: send the line "help" in the body of a message to > [EMAIL PROTECTED] > > - To unsubscribe from this list: send the line "unsubscribe xmail" in the body of a message to [EMAIL PROTECTED] For general help: send the line "help" in the body of a message to [EMAIL PROTECTED]
