shorewall_code/Shorewall-docs/ports.xml

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  <!--$Id$-->

  <articleinfo>
    <title>Ports Required for Various Services/Applications</title>

    <authorgroup>
      <author>
        <firstname>Tom</firstname>

        <surname>Eastep</surname>
      </author>
    </authorgroup>

    <pubdate>2002-07-30</pubdate>

    <copyright>
      <year>2001-2002</year>

      <holder>Thomas M. Eastep</holder>
    </copyright>

    <legalnotice>
      <para>Permission is granted to copy, distribute and/or modify this
      document under the terms of the GNU Free Documentation License, Version
      1.2 or any later version published by the Free Software Foundation; with
      no Invariant Sections, with no Front-Cover, and with no Back-Cover
      Texts. A copy of the license is included in the section entitled
      <quote><ulink url="GnuCopyright.htm">GNU Free Documentation License</ulink></quote>.</para>
    </legalnotice>

    <abstract>
      <para>In addition to those applications described in the
      /etc/shorewall/rules documentation, here are some other
      services/applications that you may need to configure your firewall to
      accommodate.</para>
    </abstract>
  </articleinfo>

  <section>
    <title>NTP (Network Time Protocol)</title>

    <para>UDP Port 123</para>
  </section>

  <section>
    <title>rdate</title>

    <para>TCP Port 37</para>
  </section>

  <section>
    <title>Usenet (NNTP)</title>

    <para>TCP Port 119</para>
  </section>

  <section>
    <title>DNS</title>

    <para>UDP Port 53. If you are configuring a DNS client, you will probably
    want to open TCP Port 53 as well. If you are configuring a server, only
    open TCP Port 53 if you will return long replies to queries or if you need
    to enable ZONE transfers. In the latter case, be sure that your server is
    properly configured.</para>
  </section>

  <section>
    <title>ICQ</title>

    <para>UDP Port 4000. You will also need to open a range of TCP ports which
    you can specify to your ICQ client. By default, clients use 4000-4100.</para>
  </section>

  <section>
    <title>PPTP</title>

    <para>Protocol 47 (NOT port 47) and TCP Port 1723 (Lots more information
    <ulink url="PPTP.htm">here</ulink> and <ulink url="VPN.htm">here</ulink>).</para>
  </section>

  <section>
    <title>IPSEC</title>

    <para>Protocols 50 and 51 (NOT ports 50 and 51) and UDP Port 500. These
    should be opened in both directions (Lots more information <ulink
    url="IPSEC.htm">here</ulink> and <ulink url="VPN.htm">here</ulink>)</para>
  </section>

  <section>
    <title>SMTP (email)</title>

    <para>TCP Port 25.</para>
  </section>

  <section>
    <title>Pop3</title>

    <para>TCP Port 110 (Secure Pop3 is TCP Port 995)</para>
  </section>

  <section>
    <title>IMAP</title>

    <para>TCP Port 143 (Secure IMAP is TCP Port 993)</para>
  </section>

  <section>
    <title>Telnet</title>

    <para>TCP Port 23.</para>
  </section>

  <section>
    <title>SSH</title>

    <para>TCP Port 22.</para>
  </section>

  <section>
    <title>Auth (identd)</title>

    <para>TCP Port 113</para>
  </section>

  <section>
    <title>Web Access</title>

    <para>TCP Ports 80 and 443.</para>
  </section>

  <section>
    <title>FTP</title>

    <para>TCP port 21 plus look <ulink url="FTP.html">here</ulink> for much
    more information.</para>
  </section>

  <section>
    <title>SMB/NMB (Samba/Windows Browsing/File Sharing)</title>

    <para>TCP Ports 137, 139 and 445.</para>

    <para>UDP Ports 137-139.</para>

    <para>Also, see <ulink url="samba.htm">this page</ulink>.</para>
  </section>

  <section>
    <title>Traceroute</title>

    <para>UDP ports 33434 through 33434+&#60;max number of hops&#62;-1</para>

    <para>ICMP type 8 (<quote>ping</quote>)</para>
  </section>

  <section>
    <title>NFS</title>

    <para>I personally use the following rules for opening access from zone z1
    to a server with IP address a.b.c.d in zone z2:</para>

    <informaltable>
      <tgroup cols="7">
        <thead>
          <row>
            <entry align="center">ACTION</entry>

            <entry align="center">SOURCE</entry>

            <entry align="center">DESTINATION</entry>

            <entry align="center">PROTOCOL</entry>

            <entry align="center">PORT(S)</entry>

            <entry align="center">SOURCE PORT(S)</entry>

            <entry align="center">ORIGINAL DEST</entry>
          </row>
        </thead>

        <tbody>
          <row>
            <entry>ACCEPT</entry>

            <entry>z1</entry>

            <entry>z2:a.b.c.d</entry>

            <entry>udp</entry>

            <entry>111</entry>

            <entry></entry>

            <entry></entry>
          </row>

          <row>
            <entry>ACCEPT</entry>

            <entry>z1</entry>

            <entry>z2:a.b.c.d</entry>

            <entry>tcp</entry>

            <entry>111</entry>

            <entry></entry>

            <entry></entry>
          </row>

          <row>
            <entry>ACCEPT</entry>

            <entry>z1</entry>

            <entry>z2:a.b.c.d</entry>

            <entry>udp</entry>

            <entry>2049</entry>

            <entry></entry>

            <entry></entry>
          </row>

          <row>
            <entry>ACCEPT</entry>

            <entry>z1</entry>

            <entry>z2:a.b.c.d</entry>

            <entry>udp</entry>

            <entry>32700:</entry>

            <entry></entry>

            <entry></entry>
          </row>
        </tbody>
      </tgroup>
    </informaltable>
  </section>

  <section>
    <title>VNC</title>

    <para>TCP port 5900 + &#60;display number&#62;.</para>
  </section>

  <section>
    <title>Other Source of Port Information</title>

    <para>Didn&#39;t find what you are looking for -- have you looked in your
    own /etc/services file?</para>

    <para>Still looking? Try <ulink
    url="http://www.networkice.com/advice/Exploits/Ports">http://www.networkice.com/advice/Exploits/Ports</ulink></para>
  </section>
</article>