254 lines
11 KiB
HTML
254 lines
11 KiB
HTML
<style>
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#custom-dns-current td.long {
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word-break: break-all;
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}
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</style>
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<h2>Custom DNS</h2>
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<p class="text-warning">This is an advanced configuration page.</p>
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<p>It is possible to set custom DNS records on domains hosted here.</p>
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<h3>Set Custom DNS Records</h3>
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<p>You can set additional DNS records, such as if you have a website running on another server, to add DKIM records for external mail providers, or for various confirmation-of-ownership tests.</p>
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<form class="form-horizontal" role="form" onsubmit="do_set_custom_dns(); return false;">
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<div class="form-group">
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<label for="customdnsQname" class="col-sm-1 control-label">Name</label>
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<div class="col-sm-10">
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<table style="max-width: 400px">
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<tr><td>
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<input type="text" class="form-control" id="customdnsQname" placeholder="subdomain">
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</td><td style="padding: 0 1em; font-weight: bold;">.</td><td>
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<select id="customdnsZone" class="form-control"> </select>
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</td></tr></table>
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<div class="text-info" style="margin-top: .5em">Leave the left field blank to set a record on the chosen domain name, or enter a subdomain.</div>
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</div>
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</div>
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<div class="form-group">
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<label for="customdnsType" class="col-sm-1 control-label">Type</label>
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<div class="col-sm-10">
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<select id="customdnsType" class="form-control" style="max-width: 400px" onchange="show_customdns_rtype_hint()">
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<option value="A" data-hint="Enter an IPv4 address (i.e. a dotted quad, such as 123.456.789.012).">A (IPv4 address)</option>
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<option value="AAAA" data-hint="Enter an IPv6 address.">AAAA (IPv6 address)</option>
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<option value="CNAME" data-hint="Enter another domain name followed by a period at the end (e.g. mypage.github.io.).">CNAME (DNS forwarding)</option>
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<option value="TXT" data-hint="Enter arbitrary text.">TXT (text record)</option>
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<option value="MX" data-hint="Enter record in the form of PRIORIY DOMAIN., including trailing period (e.g. 20 mx.example.com.).">MX (mail exchanger)</option>
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</select>
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</div>
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</div>
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<div class="form-group">
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<label for="customdnsValue" class="col-sm-1 control-label">Value</label>
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<div class="col-sm-10">
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<input type="text" class="form-control" id="customdnsValue" placeholder="">
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<div id="customdnsTypeHint" class="text-info" style="margin-top: .5em"></div>
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</div>
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</div>
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<div class="form-group">
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<div class="col-sm-offset-1 col-sm-11">
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<button type="submit" class="btn btn-primary">Set Record</button>
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</div>
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</div>
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</form>
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<table id="custom-dns-current" class="table" style="width: auto; display: none">
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<thead>
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<th>Domain Name</th>
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<th>Record Type</th>
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<th>Value</th>
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<th></th>
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</thead>
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<tbody>
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<tr><td colspan="4">Loading...</td></tr>
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</tbody>
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</table>
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<h3>Using a Secondary Nameserver</h3>
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<p>If your TLD requires you to have two separate nameservers, you can either set up a secondary (aka “slave”) nameserver or, alternatively, set up <a href="#" onclick="return show_panel('external_dns')">external DNS</a> and ignore the DNS server on this box. If you choose to use a seconday/slave nameserver, you must find a seconday/slave nameserver service provider. Your domain name registrar or virtual cloud provider may provide this service for you. Once you set up the seconday/slave nameserver service, enter the hostname of <em>their</em> secondary nameserver:</p>
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<form class="form-horizontal" role="form" onsubmit="do_set_secondary_dns(); return false;">
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<div class="form-group">
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<label for="secondarydnsHostname" class="col-sm-1 control-label">Hostname</label>
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<div class="col-sm-10">
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<input type="text" class="form-control" id="secondarydnsHostname" placeholder="ns1.cloudprovider.com">
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</div>
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</div>
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<div class="form-group">
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<div class="col-sm-offset-1 col-sm-11">
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<button type="submit" class="btn btn-primary">Update</button>
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</div>
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</div>
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<div id="secondarydns-clear-instructions" class="form-group" style="display: none">
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<div class="col-sm-offset-1 col-sm-11">
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<p class="small">Clear the input field above and click Update to use this machine itself as secondary DNS, which is the default/normal setup.</p>
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</div>
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</div>
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</form>
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<h3>Custom DNS API</h3>
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<p>Use your box’s DNS API to set custom DNS records on domains hosted here. For instance, you can create your own dynamic DNS service.</p>
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<p>Usage:</p>
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<pre>curl -X <b>VERB</b> [-d "<b>value</b>"] --user {email}:{password} https://{{hostname}}/admin/dns/custom[/<b>qname</b>[/<b>rtype</b>]]</pre>
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<p>(Brackets denote an optional argument.)</p>
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<h4>Verbs</h4>
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<table class="table">
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<thead><th>Verb</th> <th>Usage</th></thead>
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<tr><td>GET</td> <td>Returns matching custom DNS records as a JSON array of objects. Each object has the keys <code>qname</code>, <code>rtype</code>, and <code>value</code>. The optional <code>qname</code> and <code>rtype</code> parameters in the request URL filter the records returned in the response. The request body (<code>-d "..."</code>) must be omitted.</td></tr>
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<tr><td>PUT</td> <td>Sets a custom DNS record replacing any existing records with the same <code>qname</code> and <code>rtype</code>. Use PUT (instead of POST) when you only have one value for a <code>qname</code> and <code>rtype</code>, such as typical <code>A</code> records (without round-robin).</td></tr>
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<tr><td>POST</td> <td>Adds a new custom DNS record. Use POST when you have multiple <code>TXT</code> records or round-robin <code>A</code> records. (PUT would delete previously added records.)</td></tr>
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<tr><td>DELETE</td> <td>Deletes custom DNS records. If the request body (<code>-d "..."</code>) is empty or omitted, deletes all records matching the <code>qname</code> and <code>rtype</code>. If the request body is present, deletes only the record matching the <code>qname</code>, <code>rtype</code> and value.</td></tr>
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</table>
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<h4>Parameters</h4>
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<table class="table">
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<thead><th>Parameter</th> <th>Value</th></thead>
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<tr><td>email</td> <td>The email address of any administrative user here.</td></tr>
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<tr><td>password</td> <td>That user’s password.</td></tr>
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<tr><td>qname</td> <td>The fully qualified domain name for the record you are trying to set. It must be one of the domain names or a subdomain of one of the domain names hosted on this box. (Add mail users or aliases to add new domains.)</td></tr>
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<tr><td>rtype</td> <td>The resource type. Defaults to <code>A</code> if omitted. Possible values: <code>A</code> (an IPv4 address), <code>AAAA</code> (an IPv6 address), <code>TXT</code> (a text string), <code>CNAME</code> (an alias, which is a fully qualified domain name — don’t forget the final period), <code>MX</code>, or <code>SRV</code>.</td></tr>
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<tr><td>value</td> <td>For PUT, POST, and DELETE, the record’s value. If the <code>rtype</code> is <code>A</code> or <code>AAAA</code> and <code>value</code> is empty or omitted, the IPv4 or IPv6 address of the remote host is used (be sure to use the <code>-4</code> or <code>-6</code> options to curl). This is handy for dynamic DNS!</td></tr>
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</table>
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<p>Strict <a href="http://tools.ietf.org/html/rfc4408">SPF</a> and <a href="https://datatracker.ietf.org/doc/draft-kucherawy-dmarc-base/?include_text=1">DMARC</a> records will be added to all custom domains unless you override them.</p>
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<h4>Examples:</h4>
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<p>Try these examples. For simplicity the examples omit the <code>--user me@mydomain.com:yourpassword</code> command line argument which you must fill in with your email address and password.</p>
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<pre># sets laptop.mydomain.com to point to the IP address of the machine you are executing curl on
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curl -X PUT https://{{hostname}}/admin/dns/custom/laptop.mydomain.com
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# deletes that record and all A records for that domain name
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curl -X DELETE https://{{hostname}}/admin/dns/custom/laptop.mydomain.com
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# sets a CNAME alias
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curl -X PUT -d "bar.mydomain.com." https://{{hostname}}/admin/dns/custom/foo.mydomain.com/cname
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# deletes that CNAME and all CNAME records for that domain name
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curl -X DELETE https://{{hostname}}/admin/dns/custom/foo.mydomain.com/cname
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# adds a TXT record using POST to preserve any previous TXT records
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curl -X POST -d "some text here" https://{{hostname}}/admin/dns/custom/foo.mydomain.com/txt
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# deletes that one TXT record while preserving other TXT records
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curl -X DELETE -d "some text here" https://{{hostname}}/admin/dns/custom/foo.mydomain.com/txt
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</pre>
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<script>
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function show_custom_dns() {
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api(
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"/dns/secondary-nameserver",
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"GET",
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{ },
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function(data) {
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$('#secondarydnsHostname').val(data.hostname ? data.hostname : '');
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$('#secondarydns-clear-instructions').toggle(data.hostname != null);
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});
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api(
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"/dns/zones",
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"GET",
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{ },
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function(data) {
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$('#customdnsZone').text('');
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for (var i = 0; i < data.length; i++) {
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$('#customdnsZone').append($('<option/>').text(data[i]));
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}
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});
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show_current_custom_dns();
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show_customdns_rtype_hint();
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}
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function show_current_custom_dns() {
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api(
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"/dns/custom",
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"GET",
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{ },
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function(data) {
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if (data.length > 0)
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$('#custom-dns-current').fadeIn();
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else
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$('#custom-dns-current').fadeOut();
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$('#custom-dns-current').find("tbody").text('');
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for (var i = 0; i < data.length; i++) {
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var tr = $("<tr/>");
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$('#custom-dns-current').find("tbody").append(tr);
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tr.attr('data-qname', data[i].qname);
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tr.attr('data-rtype', data[i].rtype);
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tr.attr('data-value', data[i].value);
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tr.append($('<td class="long"/>').text(data[i].qname));
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tr.append($('<td/>').text(data[i].rtype));
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tr.append($('<td class="long"/>').text(data[i].value));
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tr.append($('<td>[<a href="#" onclick="return delete_custom_dns_record(this)">delete</a>]</td>'));
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}
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});
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}
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function delete_custom_dns_record(elem) {
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var qname = $(elem).parents('tr').attr('data-qname');
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var rtype = $(elem).parents('tr').attr('data-rtype');
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var value = $(elem).parents('tr').attr('data-value');
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do_set_custom_dns(qname, rtype, value, "DELETE");
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return false;
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}
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function do_set_secondary_dns() {
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api(
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"/dns/secondary-nameserver",
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"POST",
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{
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hostname: $('#secondarydnsHostname').val()
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},
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function(data) {
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if (data == "") return; // nothing updated
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show_modal_error("Secondary DNS", $("<pre/>").text(data));
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$('#secondarydns-clear-instructions').slideDown();
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},
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function(err) {
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show_modal_error("Secondary DNS", $("<pre/>").text(err));
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});
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}
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function do_set_custom_dns(qname, rtype, value, method) {
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if (!qname) {
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if ($('#customdnsQname').val() != '')
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qname = $('#customdnsQname').val() + '.' + $('#customdnsZone').val();
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else
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qname = $('#customdnsZone').val();
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rtype = $('#customdnsType').val();
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value = $('#customdnsValue').val();
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method = 'POST';
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}
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api(
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"/dns/custom/" + qname + "/" + rtype,
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method,
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value,
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function(data) {
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if (data == "") return; // nothing updated
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show_modal_error("Custom DNS", $("<pre/>").text(data));
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show_current_custom_dns();
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},
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function(err) {
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show_modal_error("Custom DNS (Error)", $("<pre/>").text(err));
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});
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}
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function show_customdns_rtype_hint() {
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$('#customdnsTypeHint').text($("#customdnsType").find('option:selected').attr('data-hint'));
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}
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</script>
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