https://voipsupport.it/wiki/index.php?title=Callback_FAQ&feed=atom&action=historyCallback FAQ - Revision history2024-03-28T12:08:37ZRevision history for this page on the wikiMediaWiki 1.39.4https://voipsupport.it/wiki/index.php?title=Callback_FAQ&diff=528&oldid=prevJohn: /* When reporting a problem what information should I provide? */2016-06-13T14:07:23Z<p><span dir="auto"><span class="autocomment">When reporting a problem what information should I provide?</span></span></p>
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<td colspan="2" style="background-color: #fff; color: #202122; text-align: center;">Revision as of 15:07, 13 June 2016</td>
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<tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>As a further precaution, where the callback destination is DISA, consider using a further level of protection via a PIN code which can be set up in FreePBX GUI.</div></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>As a further precaution, where the callback destination is DISA, consider using a further level of protection via a PIN code which can be set up in FreePBX GUI.</div></td></tr>
<tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><br/></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><br/></td></tr>
<tr><td class="diff-marker" data-marker="−"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div>===When reporting a problem what information should I provide?===</div></td><td class="diff-marker" data-marker="+"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div>===<ins style="font-weight: bold; text-decoration: none;">Q. </ins>When reporting a problem what information should I provide?===</div></td></tr>
<tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><br/></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><br/></td></tr>
<tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>Please see [[Callback Support|here]]</div></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>Please see [[Callback Support|here]]</div></td></tr>
</table>Johnhttps://voipsupport.it/wiki/index.php?title=Callback_FAQ&diff=527&oldid=prevJohn at 14:07, 13 June 20162016-06-13T14:07:11Z<p></p>
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<td colspan="2" style="background-color: #fff; color: #202122; text-align: center;">Revision as of 15:07, 13 June 2016</td>
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<tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>===Q. Are there security implications in using the callback script?===</div></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>===Q. Are there security implications in using the callback script?===</div></td></tr>
<tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><br/></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><br/></td></tr>
<tr><td colspan="2" class="diff-side-deleted"></td><td class="diff-marker" data-marker="+"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div><ins style="font-weight: bold; text-decoration: none;">The use of callback potentially opens up functions of your system which are normally reserved to internal users, it is important to thoroughly test your callback configuration. </ins></div></td></tr>
<tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><br/></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><br/></td></tr>
<tr><td colspan="2" class="diff-side-deleted"></td><td class="diff-marker" data-marker="+"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div><ins style="font-weight: bold; text-decoration: none;">The CALLBACK_ALLOWED configuration can help to increase security by restricting the numbers which will be called back.</ins></div></td></tr>
<tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><br/></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><br/></td></tr>
<tr><td class="diff-marker" data-marker="−"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div><del style="font-weight: bold; text-decoration: none;">The script is provided "as-is" without any kind of warranty. I'm happy to receive feedback and correct issues that are found in the script. Because the use of callback potentially opens up functions of your system which are normally reserved to internal users, it is important to thoroughly test your callback configuration. </del>If you use the <del style="font-weight: bold; text-decoration: none;">mysql lookup available from version 0.4 please be aware that the this means the db has to be available for the callback to succeed and therefore adds an additional point of failure/availability requirement. Also, use of a mysql </del>database to <del style="font-weight: bold; text-decoration: none;">read allowable </del>callback numbers <del style="font-weight: bold; text-decoration: none;">has security implications, since </del>you open callback up to whoever is able to write into the sql table you are using. You should test the query thoroughly to ensure that it does not return rows in the case of unknown numbers or unauthorized numbers. The use of the CALLBACK_ALLOWED parameter is only secure if the callerid you receive comes from a trusted source. If your provider that does not guard against spoofing of callerids on incoming calls then CALLBACK_ALLOWED will not protect you fully. As a further precaution, where the callback destination is DISA, consider using a further level of protection via a PIN code which can be set up in <del style="font-weight: bold; text-decoration: none;">Freepbx </del>GUI.</div></td><td class="diff-marker" data-marker="+"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div>If you use the <ins style="font-weight: bold; text-decoration: none;">MySQL </ins>database to <ins style="font-weight: bold; text-decoration: none;">store allowed </ins>callback numbers <ins style="font-weight: bold; text-decoration: none;">then </ins>you open callback up to whoever is able to write into the sql table you are using. You should test the query thoroughly to ensure that it does not return rows in the case of unknown numbers or unauthorized numbers. </div></td></tr>
<tr><td colspan="2" class="diff-side-deleted"></td><td class="diff-marker" data-marker="+"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div> </div></td></tr>
<tr><td colspan="2" class="diff-side-deleted"></td><td class="diff-marker" data-marker="+"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div>The use of the CALLBACK_ALLOWED parameter is only secure if the callerid you receive comes from a trusted source. If your provider that does not guard against spoofing of callerids on incoming calls then CALLBACK_ALLOWED will not protect you fully. </div></td></tr>
<tr><td colspan="2" class="diff-side-deleted"></td><td class="diff-marker" data-marker="+"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div> </div></td></tr>
<tr><td colspan="2" class="diff-side-deleted"></td><td class="diff-marker" data-marker="+"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div>As a further precaution, where the callback destination is DISA, consider using a further level of protection via a PIN code which can be set up in <ins style="font-weight: bold; text-decoration: none;">FreePBX </ins>GUI.</div></td></tr>
<tr><td colspan="2" class="diff-side-deleted"></td><td class="diff-marker" data-marker="+"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div> </div></td></tr>
<tr><td colspan="2" class="diff-side-deleted"></td><td class="diff-marker" data-marker="+"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div><ins style="font-weight: bold; text-decoration: none;">===When reporting a problem what information should I provide?===</ins></div></td></tr>
<tr><td colspan="2" class="diff-side-deleted"></td><td class="diff-marker" data-marker="+"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div> </div></td></tr>
<tr><td colspan="2" class="diff-side-deleted"></td><td class="diff-marker" data-marker="+"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div><ins style="font-weight: bold; text-decoration: none;">Please see [[Callback Support|here]]</ins></div></td></tr>
</table>Johnhttps://voipsupport.it/wiki/index.php?title=Callback_FAQ&diff=523&oldid=prevJohn: Created page with "===Q. What are the prerequisites for using the callback script?=== There are no additional prerequisites beyond those needed for Asterisk and FreePBX. If you use the CALLBACK..."2016-06-13T14:02:17Z<p>Created page with "===Q. What are the prerequisites for using the callback script?=== There are no additional prerequisites beyond those needed for Asterisk and FreePBX. If you use the CALLBACK..."</p>
<p><b>New page</b></p><div>===Q. What are the prerequisites for using the callback script?===<br />
<br />
There are no additional prerequisites beyond those needed for Asterisk and FreePBX. If you use the CALLBACK_ALLOWED configuration to point to a database, then that will introduce additional requirements (the database availability) for call processing.<br />
<br />
===Q. Are there security implications in using the callback script?===<br />
<br />
<br />
<br />
The script is provided "as-is" without any kind of warranty. I'm happy to receive feedback and correct issues that are found in the script. Because the use of callback potentially opens up functions of your system which are normally reserved to internal users, it is important to thoroughly test your callback configuration. If you use the mysql lookup available from version 0.4 please be aware that the this means the db has to be available for the callback to succeed and therefore adds an additional point of failure/availability requirement. Also, use of a mysql database to read allowable callback numbers has security implications, since you open callback up to whoever is able to write into the sql table you are using. You should test the query thoroughly to ensure that it does not return rows in the case of unknown numbers or unauthorized numbers. The use of the CALLBACK_ALLOWED parameter is only secure if the callerid you receive comes from a trusted source. If your provider that does not guard against spoofing of callerids on incoming calls then CALLBACK_ALLOWED will not protect you fully. As a further precaution, where the callback destination is DISA, consider using a further level of protection via a PIN code which can be set up in Freepbx GUI.</div>John