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<h3>6. Blocked ports</h3>  <p>There are several ports blocked according to the instructions of  the HUT Computing Centre.</p>  <table>  <tbody><tr><th>Service</th><th>TCP</th><th>UDP</th><th>Notice</th></tr>  <tr><td>echo, discard etc.</td><td>0-19</td><td>0-19</td><td></td></tr>  <tr><td>telnet</td><td>23</td><td>23</td><td></td></tr>  <tr><td>smtp</td><td>25</td><td></td><td>except to smtp.hut.fi</td></tr>  <tr><td>tftp</td><td></td><td>69</td><td></td></tr>  <tr><td>kerberos</td><td>88</td><td>88</td><td></td></tr>  <tr><td>sunrpc</td><td>111</td><td>111</td><td></td></tr>  <tr><td>netbios-*</td><td>135-139</td><td>135-139</td><td></td></tr>  <tr><td>snmp, snmptrap</td><td>161-162</td><td>161-162</td><td></td></tr>  <tr><td>slp</td><td>427</td><td>427</td><td></td></tr>  <tr><td>microsoft-ds</td><td>445</td><td>445</td><td></td></tr>  <tr><td>r-services</td><td>512-514</td><td>513</td><td></td></tr>  <tr><td>ncp</td><td>524</td><td>524</td><td></td></tr>  <tr><td>submission</td><td>587</td><td>587</td><td></td></tr>  <tr><td>http-rpc-epmap</td><td>593</td><td>593</td><td></td></tr>  <tr><td>Kazaa</td><td>1214</td><td></td><td></td></tr>  <tr><td>msg</td><td></td><td>1241</td><td></td></tr>  <tr><td>ms-sql-*</td><td>1433-1434</td><td>1433-1434</td><td></td></tr>  <tr><td>tftp-mcast</td><td>1758-1759</td><td>1758-1759</td><td></td></tr>  <tr><td>radius, radacct</td><td>1812-1813</td><td>1812-1813</td><td></td></tr>  <tr><td>ssdp</td><td>1900</td><td>1900</td><td></td></tr>  <tr><td>nfsd</td><td>2049</td><td>2049</td><td></td></tr>  <tr><td>novell-ipx-cmd</td><td>2645</td><td>2645</td><td></td></tr>  <tr><td>rdp</td><td>3389</td><td></td><td></td></tr>  <tr><td>eDonkey</td><td>4661-4665</td><td>4661-4665</td><td></td></tr>  <tr><td>upnp</td><td>5000</td><td>5000</td><td></td></tr>  <tr><td>x11</td><td>6000</td><td></td><td></td></tr>  <tr><td>dameware</td><td>6129</td><td></td><td></td></tr>  <tr><td>analogx-proxy</td><td>6588</td><td></td><td></td></tr>  </tbody></table>  <p></p>