Commit Graph

93 Commits

Author SHA1 Message Date
Joshua Tauberer 99d0afd650 secondary nameserver check fails if domain has custom DNS (round-robin) multiple A records
fixes #834
2016-12-07 07:02:52 -05:00
rxcomm bbe27df413 SSHFP record creation should scan nonstandard SSH port if necessary (#974)
* sshfp records from nonstandard ports

If port 22 is not open, dns_update.py will not create SSHFP records
because it only scans port 22 for keys. This commit modifies
dns_update.py to parse the sshd_config file for open ports, and
then obtains keys from one of them (even if port 22 is not open).

* modified test of s per JoshData request

* edit CHANGELOG per JoshData

* fix typo
2016-10-15 15:36:13 -04:00
Joshua Tauberer cf3e1cd595 add SRV records for CardDAV/CalDAV
DavDroid's latest version's account configuration no longer just asked for a hostname. Its email address & password configuration mode did not work without a SRV record.
2016-07-31 20:53:57 -04:00
Robert G. Jakabosky 72fcb005b2 Check MX priority. 2016-03-22 03:07:14 +08:00
Robert G. Jakabosky 84638ab11e Fix creation of custom MX records. 2016-03-21 21:12:08 +08:00
Joshua Tauberer 5cabfd591b (re-fix) mail sent from an address on a subdomain of a domain hosted by the box (a non-zone domain) would never be DKIM-signed because only zones were included in the openDKIM configuration, mistakenly
This was originally fixed in 143bbf37f4 (February 16, 2015). Then I broke it in 7a93d219ef (November 2015) while doing some refactoring ahead of v0.15.
2016-02-23 10:16:04 -05:00
baltoche 36e5772a8e Update dns_update.py 2016-01-05 16:56:16 +01:00
Joshua Tauberer 392d33b902 change DANE TLSA record to hash the subject public key rather than the whole certificate, which means it is good for any certificate tied to the same private key
Better for short-lived certificates. This is especially in preparation to using certificates from Let's Encrypt.

see #268
2015-12-26 11:01:46 -05:00
Joshua Tauberer 7a93d219ef some cleanup in dns_update.py 2015-11-29 14:59:35 +00:00
Joshua Tauberer 808522d895 merge functions get_web_domains and get_default_www_redirects 2015-11-29 14:46:08 +00:00
Joshua Tauberer 1926bfa1c5 all DNS queries should have a timeout, fixes #591 2015-11-11 12:25:55 +00:00
Joshua Tauberer 3fd1279e7d ...but then also have to compare against the intended IP address, which might have a custom override, see #582 2015-11-03 12:06:03 +00:00
Joshua Tauberer 58349a9410 when updating DNS, clear the local DNS cache 2015-09-18 13:00:53 +00:00
Joshua Tauberer d3bbc0ec95 bug in new secondary nameservers
forgot a 'continue' statement
see 216acb0eeb
fixes #497
2015-07-20 11:25:16 +00:00
PortableTech 415f95b792 Add TLSA record for HTTPS connections.
While not widely supported, there are some browser addons that can
validate DNSSEC and TLSA for additional out-of-band verification of
certificates when browsing the web.  Costs nothing to implement and
might improve security in some situations.
2015-07-13 09:12:13 -04:00
Joshua Tauberer 5dd5fc4a1c clean up multiple secondary nameservers and zone xfr ip addresses 2015-07-10 15:42:33 +00:00
Brian Bustin 09133c8f59 Initial backend changes to make it possible to have one or more secondary name servers 2015-07-10 14:59:38 +00:00
Joshua Tauberer 299a2315c1 dkim 2048 bits - migration and zone file generation changes
* Add a migration to delete any existing DKIM key so that existing machines get a fresh 2048-bit key. (Sadly we don't support key rotation so the change is immediate.)
* Because the DNS record for a 2048-bit key is so much longer, the way we read OpenDKIM's DNS record text file had to be modified to combine an arbitrary number of TXT record quoted ("...") strings.
* When writing out the TXT record value, the string must be split into quoted ("...") strings with a maximum length of 255 bytes each, per the DNS spec.
* Added a changelog entry.
2015-06-25 13:06:29 +00:00
Joshua Tauberer 2af557139d default IPv6 AAAA records were missing
This was broken by the ability to have multiple TXT records in 9f1d633ae4.
2015-06-17 06:47:22 -04:00
Joshua Tauberer 95173bb327 provide redirects from www subdomains of zones to their parent domain
* Split the nginx templates again so we have just the part needed to make a domain do a redirect separate from the rest.
* Add server blocks to the nginx config for these domains.
* List these domains in the SSL certificate install admin panel.
* Generate default 'www' records just for domains we provide default redirects for.

Fixes #321.
2015-06-04 12:19:01 +00:00
David Piggott f78bbab289 Make SPF forbid any outbound mail from non-mail domains 2015-05-28 18:11:44 +01:00
David Piggott 7b9b978a6d Improve DMARC and SPF record descriptions 2015-05-28 16:34:58 +01:00
Joshua Tauberer 8886c9b6bc move the server: block of nsd.conf out of the management daemon and into the setup scripts 2015-05-04 11:24:40 +00:00
Joshua Tauberer 9f1d633ae4 re-do the custom DNS get/set routines so it is possible to store more than one record for a qname-rtype pair, like multiple TXT records 2015-05-03 13:43:38 +00:00
Joshua Tauberer 322a5779f1 store IDNs (internationalized domain names) in IDNA (ASCII) in our database, not in Unicode
I changed my mind. In 1bf8f1991f I allowed Unicode domain names to go into the database. I thought that was nice because it's what the user *means*. But it's not how the web works. Web and DNS were working, but mail wasn't. Postfix (as shipped with Ubuntu 14.04 without support for SMTPUTF8) exists in an ASCII-only world. When it goes to the users/aliases table, it queries in ASCII (IDNA) only and had no hope of delivering mail if the domain was in full Unicode in the database. I was thinking ahead to SMTPUTF8, where we *could* put Unicode in the database (though that would prevent IDNA-encoded addressing from being deliverable) not realizing it isn't well supported yet anyway.

It's IDNA that goes on the wire in most places anyway (SMTP without SMTPUTF8 (and therefore how Postfix queries our users/aliases tables), DNS zone files, nginx config, CSR 'CN' field, X509 Common Name and Subject Alternative Names fields), so we should really be talking in terms of IDNA (i.e. ASCII).

This partially reverts commit 1bf8f1991f, where I added a lot of Unicode=>IDNA conversions when writing configuration files. Instead I'm doing Unicode=>IDNA before email addresses get into the users/aliases table. Now we assume the database uses IDNA-encoded ASCII domain names. When adding/removing aliases, addresses are converted to ASCII (w/ IDNA). User accounts must be ASCII-only anyway because of Dovecot's auth limitations, so we don't do any IDNA conversion (don't want to change the user's login info behind their back!). The aliases control panel page converts domains back to Unicode for display to be nice. The status checks converts the domains to Unicode just for the output headings.

A migration is added to convert existing aliases with Unicode domains into IDNA. Any custom DNS or web settings with Unicode may need to be changed.

Future support for SMTPUTF8 will probably need to add columns in the users/aliases table so that it lists both IDNA and Unicode forms.
2015-04-09 14:46:02 +00:00
Joshua Tauberer 14b16b2f36 allow custom DNS TXT records for SPF, DKIM, and DMARC to override the ones we want to set
fixes #323
fixes #324
2015-03-30 01:20:03 +00:00
Joshua Tauberer cbc7e280d6 set the SPF record after custom DNS records so that the SPF record doesn't prevent all custom TXT records from coming in 2015-03-30 01:18:05 +00:00
Ben Schumacher 6558f05d1d Give the DNS update tool the ability to customize MX records. Useful if you want a subdomain to send mail to another host. 2015-03-04 13:32:35 -05:00
Joshua Tauberer 348d2b8701 Merge pull request #326 from dhpiggott/custom-dns-filter-secondary-nameserver
Do not show '_secondary_nameserver' in Custom DNS table
2015-02-17 08:31:34 -05:00
David Piggott 12f0dcb23b Do not show '_secondary_nameserver' in Custom DNS table
It's redundant and potentially confusing, as any secondary NS shows in "Using a
Secondary Nameserver".
2015-02-17 13:28:48 +00:00
Joshua Tauberer 143bbf37f4 all mail domains, not just (top-level) zones, must have an entry in the opendkim key tables so that such outgoing mail gets signed
If you had both x.y.com and y.com configured here, x.y.com mail would not get DKIM-signed.
2015-02-16 18:13:51 -05:00
Joshua Tauberer 21b00e8fbb if a custom A record is set, dont put in a default AAAA record pointing to the box because it will probably be wrong --- the user should either set an AAAA record or let the domain not resolve on IPv6 2015-02-03 21:51:19 -05:00
Joshua Tauberer 1bf8f1991f internationalized domain names (DNS, web, CSRs, normalize to Unicode in database, prohibit non-ASCII characters in user account names)
* For non-ASCII domain names, we will keep the Unicode encoding in our users/aliases table. This is nice for the user and also simplifies things like sorting domain names (using Unicode lexicographic order is good, using ASCII lexicogrpahic order on IDNA is confusing).
* Write nsd config, nsd zone files, nginx config, and SSL CSRs with domains in IDNA-encoded ASCII.
* When checking SSL certificates, treat the CN and SANs as IDNA.
* Since Chrome has an interesting feature of converting Unicode to IDNA in <input type="email"> form fields, we'll also forcibly convert IDNA to Unicode in the domain part of email addresses before saving email addresses in the users/aliases tables so that the table is normalized to Unicode.
* Don't allow non-ASCII characters in user account email addresses. Dovecot gets confused when querying the Sqlite database (which we observed even for non-word ASCII characters too, so it may not be related to the character encoding).
2015-01-19 23:31:55 +00:00
Joshua Tauberer 24cc108147 if a custom CNAME record is set, don't add a default A/AAAA record, e.g. for 'www'
see https://discourse.mailinabox.email/t/multiple-domains-in-mail-in-a-box-with-the-domains-being-hosted-elsewhere/56/18
2015-01-19 22:04:21 +00:00
Joshua Tauberer fddab5d432 allow the dns api to set srv records
see https://discourse.mailinabox.email/t/create-srv-record-at-the-dns-server/225
2015-01-02 23:39:09 +00:00
Joshua Tauberer 90592bb157 add a control panel for setting custom dns records so that we dont have to use the api manually 2014-12-21 11:31:24 -05:00
Joshua Tauberer be59bcd47d for .fund domains use RSASHA256 DNSSEC keys 2014-12-05 12:03:21 -05:00
Joshua Tauberer a7710e9058 dns.resolver.query treats hostnames as relative names if they don't end in a period
Relative hostnames have a fall-back lookup with the machine's hostname appended, which makes no sense. Add a period, e.g. "my.hostname.com" => "my.hostname.com.", to prevent that.

This caused false positive Spamhaus checks. Fixes #185.
2014-11-21 15:16:59 +00:00
Joshua Tauberer d790cae0e2 DNSSEC: use RSASHA256 for the .guide tld too 2014-10-23 17:03:23 +00:00
David Piggott ca57560f11 Pass additional_records to recursive build_zone calls, closes #229
The problem was that custom records defined for a subdomain where implicit
records are otherwise defined (e.g. A/AAAA records for the root) were ignored.

Though additional_records for a subdomain are processed in the base call to
build_zone (the call for the parent domain), and so custom records that don't
override implicits were working fine, those that overrode implicits were
ignored.

This was because the recursive call to build_zone for the subdomain creates the
implicit records (including A/AAAA records for the root), and so by relying on
the base call to add the additional_records fails because has_rec returned
true.

Adding a subdomain's additional_records in the child call works because has_rec
returns false when testing whether to add an e.g. A/AAAA override for the root,
as the defaults have not yet been added.
2014-10-11 17:04:35 +01:00
Joshua Tauberer bf9b770255 sort SSHFP records so that DNS updates don't trigger spurrious zone changes 2014-10-07 15:15:22 +00:00
Joshua Tauberer f42a1c5a74 allow overriding the second nameserver with a secondary/slave server
fixes #151
fixes #223
2014-10-05 14:53:42 +00:00
Joshua Tauberer 4ae76aa2dd dnssec: use RSASHA256 keys for .email domains 2014-10-04 17:29:42 +00:00
Joshua Tauberer ab47144ae3 add strict SPF and DMARC records to any subdomains (including custom records) that do not have SPF/DMARC set
closes #208
2014-09-26 14:01:03 +00:00
Joshua Tauberer 9b6f9859d1 dns_update: assume DKIM is present 2014-09-26 14:01:03 +00:00
Joshua Tauberer c7c3bd33cf DNS API should reject qnames that aren't in a zone managed by the box
see https://discourse.mailinabox.email/t/set-www-a-and-other-dns-records-after-install/63/10
2014-09-21 13:37:30 +00:00
Joshua Tauberer 16e2350fef revise the description of A records on domains: the A record must be present for good deliverability so that the envelope domain resolves, but it doesn't have to resolve to this machine 2014-09-15 06:00:50 -04:00
Joshua Tauberer 110e0f90d9 dns: move the quoting of TXT records to when we write the zone file so that we can display it unquoted in the External DNS instructions 2014-09-07 11:42:20 +00:00
Joshua Tauberer 7a449c76a1 set the DNS TTL to 30 minutes rather than 1 day
Also updating the values for secondary DNS, but we're not set up
for secondary DNS so it won't matter.

see #172
2014-09-01 23:06:55 +00:00
Joshua Tauberer 10a37cd033 add SSHFP records to DNS 2014-08-27 12:59:40 +00:00