doc/help/firewalls.html

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   3 <!-- SECTION: Getting Started -->
   4   <head>
   5     <title>Firewalls</title>
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   8   <body>
   9     <h1 class="title">Firewalls</h1>
  10
  11     <p>This help document describes the ports that CUPS uses so that firewall administrators can allow traffic used for printing.</p>
  12
  13     <h2 class="title">Ports Used for Printer Sharing</h2>
  14
  15     <p>The following ports are used for printer sharing:</p>
  16
  17     <div class="table"><table summary="Ports Used for Printer Sharing">
  18       <thead>
  19         <tr><th>Port</th><th>TCP/UDP</th><th>Description</th></tr>
  20       </thead>
  21       <tbody>
  22         <tr><td>53&nbsp;(DNS)</td><td>TCP/UDP</td><td>Domain Name System lookups and service registrations.</td></tr>
  23         <tr><td>137&nbsp;(WINS)</td><td>UDP</td><td>Windows Internet Naming Service (name lookup for SMB printing).</td></tr>
  24         <tr><td>139&nbsp;(SMB)</td><td>TCP</td><td>Windows SMB printing.</td></tr>
  25         <tr><td>445&nbsp;(SMBDS)</td><td>TCP</td><td>Windows SMB Domain Server (authenticated SMB printing).</td></tr>
  26         <tr><td>631&nbsp;(IPP/IPPS)</td><td>TCP</td><td>Internet Printing Protocol requests and responses (print jobs, status monitoring, etc.)</td></tr>
  27         <tr><td>5353&nbsp;(mDNS)</td><td>UDP</td><td>Multicast DNS lookups and service registrations.</td></tr>
  28       </tbody>
  29     </table></div>
  30
  31
  32     <h2 class="title">Ports Used for Network Printers</h2>
  33
  34     <p>The following ports are used for network printers:</p>
  35
  36     <div class="table"><table summary="Ports Used for Network Printers">
  37       <thead>
  38         <tr><th>Port(s)</th><th>TCP/UDP</th><th>Description</th></tr>
  39       </thead>
  40       <tbody>
  41         <tr><td>53&nbsp;(DNS)</td><td>TCP/UDP</td><td>Domain Name System lookups.</td></tr>
  42         <tr><td>137&nbsp;(WINS)</td><td>UDP</td><td>Windows Internet Naming Service (name lookup for SMB printing).</td></tr>
  43         <tr><td>139&nbsp;(SMB)</td><td>TCP</td><td>Windows SMB printing.</td></tr>
  44         <tr><td>161&nbsp;(SNMP)</td><td>UDP</td><td>SNMP browsing (broadcast) and status monitoring (directed to printer IP address).</td></tr>
  45         <tr><td>443&nbsp;(IPPS)</td><td>TCP</td><td>Internet Printing Protocol requests and responses (print jobs, status monitoring, etc.)</td></tr>
  46         <tr><td>445&nbsp;(SMBDS)</td><td>TCP</td><td>Windows SMB Domain Server (authenticated SMB printing).</td></tr>
  47         <tr><td>515&nbsp;(LPD)</td><td>TCP</td><td>Line Printer Daemon (LPD/lpr) print job submission and status monitoring.</td></tr>
  48         <tr><td>631&nbsp;(IPP/IPPS)</td><td>TCP</td><td>Internet Printing Protocol requests and responses (print jobs, status monitoring, etc.)</td></tr>
  49         <tr><td>5353&nbsp;(mDNS)</td><td>UDP</td><td>Multicast DNS lookups.</td></tr>
  50         <tr><td>9100-9102</td><td>TCP</td><td>Raw print data stream (AppSocket/JetDirect).</td></tr>
  51       </tbody>
  52     </table></div>
  53   </body>
  54 </html>