129 lines
3.9 KiB
Bash
Executable File
129 lines
3.9 KiB
Bash
Executable File
# DNS: Creates DNS zone files
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#############################
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# Create nsd.conf and zone files, and updates the OpenDKIM signing tables.
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# We set the administrative email address for every domain to domain_contact@[domain.com].
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# You should probably create an alias to your email address.
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# This script is safe to run on its own.
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source /etc/mailinabox.conf # load global vars
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# Ensure a zone file exists for every domain name in use by a mail user.
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for mail_user in `tools/mail.py user`; do
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domain=`echo $mail_user | sed s/.*@//`
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if [ ! -f $STORAGE_ROOT/dns/$domain.txt ]; then
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echo "" > $STORAGE_ROOT/dns/$domain.txt;
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fi
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done
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# Create the top of nsd.conf.
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cat > /etc/nsd/nsd.conf << EOF;
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server:
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hide-version: yes
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# identify the server (CH TXT ID.SERVER entry).
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identity: ""
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# The directory for zonefile: files.
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zonesdir: "/etc/nsd/zones"
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# ZONES
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EOF
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# For every zone file in our dns directory, build a proper zone
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# file and mention it in nsd.conf. And add information to the
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# OpenDKIM signing tables.
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mkdir -p /etc/nsd/zones;
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truncate --size 0 /etc/opendkim/KeyTable
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truncate --size 0 /etc/opendkim/SigningTable
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for fn in $STORAGE_ROOT/dns/*.txt; do
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# $fn is the zone configuration file, which is just a placeholder now.
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# For every file like mydomain.com.txt we'll create zone information
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# for that domain. We don't actually read the file.
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# $fn2 is the file without the directory.
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# $zone is the domain name (just mydomain.com).
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fn2=`basename $fn`
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zone=`echo $fn2 | sed "s/.txt\$//"`
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# If the zone file exists, get the existing zone serial number so we can increment it.
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# TODO: This needs to be done better so that the existing serial number is persisted in the storage area.
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serial=`date +"%Y%m%d00"`
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if [ -f /etc/nsd/zones/$fn2 ]; then
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existing_serial=`grep "serial number" /etc/nsd/zones/$fn2 | sed "s/; serial number//"`
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if [ ! -z "$existing_serial" ]; then
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serial=`echo $existing_serial + 1 | bc`
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fi
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fi
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# Create the zone file.
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cat > /etc/nsd/zones/$fn2 << EOF;
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\$ORIGIN $zone. ; default zone domain
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\$TTL 86400 ; default time to live
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@ IN SOA ns1.$PUBLIC_HOSTNAME. hostmaster.$PUBLIC_HOSTNAME. (
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$serial ; serial number
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28800 ; Refresh
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7200 ; Retry
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864000 ; Expire
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86400 ; Min TTL
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)
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NS ns1.$PUBLIC_HOSTNAME.
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NS ns2.$PUBLIC_HOSTNAME.
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IN A $PUBLIC_IP
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MX 10 $PUBLIC_HOSTNAME.
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300 TXT "v=spf1 mx -all"
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www IN A $PUBLIC_IP
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EOF
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# In PUBLIC_HOSTNAME, also define ns1 and ns2.
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if [ "$zone" = $PUBLIC_HOSTNAME ]; then
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cat >> /etc/nsd/zones/$fn2 << EOF;
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ns1 IN A $PUBLIC_IP
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ns2 IN A $PUBLIC_IP
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EOF
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fi
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# If OpenDKIM is set up, append the suggested TXT record to the zone.
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if [ -f "$STORAGE_ROOT/mail/dkim/mail.txt" ]; then
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cat "$STORAGE_ROOT/mail/dkim/mail.txt" >> /etc/nsd/zones/$fn2;
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fi
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# Add this zone file to the main nsd configuration file.
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cat >> /etc/nsd/nsd.conf << EOF;
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zone:
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name: $zone
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zonefile: $fn2
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EOF
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# Append a record to OpenDKIM's KeyTable and SigningTable. The SigningTable maps
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# email addresses to signing information. The KeyTable maps specify the hostname,
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# the selector, and the path to the private key.
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#
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# Just in case we don't actually host the DNS for all domains of our mail users,
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# we assume that DKIM is at least configured in the DNS of $PUBLIC_HOSTNAME and
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# we use that host for all DKIM signatures.
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#
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# In SigningTable, we map every email address to a key record called $zone.
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# Then we specify for the key record named $zone its domain, selector, and key.
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echo "$zone $PUBLIC_HOSTNAME:mail:$STORAGE_ROOT/mail/dkim/mail.private" >> /etc/opendkim/KeyTable
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echo "*@$zone $zone" >> /etc/opendkim/SigningTable
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done
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# Kick nsd.
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service nsd rebuild
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service nsd restart # ensure it is running
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# Kick opendkim.
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service opendkim restart
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