Re: Simple packet filter

From: Jaap de Koning (j.dekoning_at_spectrafacility.nl)
Date: 06/12/03 

Date: 12 Jun 2003 06:31:28 -0700

DNS is handled also by the firewall, i basicly just need to lock out
everything except port 25. I didn't know that Windows 2000 had a
build-in packetfilter, i thought you needed either Proxy 2.0 or ISA
server for that.

Regards,
Jaap de Koning

Barry Margolin <barry.margolin@level3.com> wrote in message news:<AEHFa.10$Fs2.216@paloalto-snr1.gtei.net>...
> In article <c797e024.0306110017.720db515@posting.google.com>,
> Jaap de Koning <j.dekoning@spectrafacility.nl> wrote:
> >Hello,
> >
> >I am looking for a simple packet filter, which should only do the
> >following:
> >
> >I have an Windows 2000 server with 2 network cards. All HTTP and other
> >internet trafic is handled by our firewall, so no worries there. The
> >mail is received on the other network card, and i would like to just
> >enable that card for SMTP (port 25). In other words, i would like to
> >shut down the entire networkcard except for port 25.
>
> SMTP servers often send out DNS queries, so you'll need to allow the
> replies back in as well. These don't have a fixed local port, but the
> remote port will always be 53.
>
> >Does anyone know if such software exists? I would like it to be cheap,
> >preferably even free.
>
> Doesn't Windows have a built-in packet filter?

Relevant Pages

  • Re: How to Maintain an IIS Server?
    ... > server running on a Windows 2000 server. ... before a firewall and antivirus have been installed]. ... open ports; however, this will not identify which program is using the port. ...
    (microsoft.public.inetserver.iis.security)
  • Re: keeping ports open
    ... If a port is open, it means that 1) a software or service is running on your ... and 2) you're not using a firewall or your firewall isn't ... Use firewall software and hardware and antivirus software that is ... Follow the instructions for hardening Windows and IIS at ...
    (microsoft.public.security)
  • Re: How to Maintain an IIS Server?
    ... >> server running on a Windows 2000 server. ... > before a firewall and antivirus have been installed]. ... > program or executable using that port. ...
    (microsoft.public.inetserver.iis.security)
  • Re: Is secedit.exe left by a hacker?
    ... >> tested on port 445. ... >> I have a Linksys router that I use as a firewall to my ... >investigate the files on your computer - antivirus with ... >windows and everything else. ...
    (microsoft.public.win2000.security)
  • Re: Is secedit.exe left by a hacker?
    ... > tested on port 445. ... > I have a Linksys router that I use as a firewall to my ... Secedit.exe is the name of a legitimate Windows file, ... investigate the files on your computer - antivirus with the latest updates ...
    (microsoft.public.win2000.security)
Quantcast