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6d259a6e12
On some machines localhost is defined as something other than 127.0.0.1, and if we mix "127.0.0.1" and "localhost" then some connections won't be to to the address a service is actually running on. This was the case with DKIM: It was running on "localhost" but Postfix was connecting to it at 127.0.0.1. (https://discourse.mailinabox.email/t/opendkim-is-not-running-port-8891/1188/12.) I suppose "localhost" could be an alias to an IPv6 address? We don't really want local services binding on IPv6, so use "127.0.0.1" to be explicit and don't use "localhost" to be sure we get an IPv4 address. Fixes #797
83 lines
2.9 KiB
Bash
Executable File
83 lines
2.9 KiB
Bash
Executable File
#!/bin/bash
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# OpenDKIM
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# --------
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#
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# OpenDKIM provides a service that puts a DKIM signature on outbound mail.
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#
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# The DNS configuration for DKIM is done in the management daemon.
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source setup/functions.sh # load our functions
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source /etc/mailinabox.conf # load global vars
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# Install DKIM...
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echo Installing OpenDKIM/OpenDMARC...
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apt_install opendkim opendkim-tools opendmarc
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# Make sure configuration directories exist.
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mkdir -p /etc/opendkim;
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mkdir -p $STORAGE_ROOT/mail/dkim
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# Used in InternalHosts and ExternalIgnoreList configuration directives.
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# Not quite sure why.
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echo "127.0.0.1" > /etc/opendkim/TrustedHosts
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if grep -q "ExternalIgnoreList" /etc/opendkim.conf; then
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true # already done #NODOC
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else
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# Add various configuration options to the end of `opendkim.conf`.
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cat >> /etc/opendkim.conf << EOF;
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MinimumKeyBits 1024
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ExternalIgnoreList refile:/etc/opendkim/TrustedHosts
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InternalHosts refile:/etc/opendkim/TrustedHosts
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KeyTable refile:/etc/opendkim/KeyTable
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SigningTable refile:/etc/opendkim/SigningTable
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Socket inet:8891@127.0.0.1
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RequireSafeKeys false
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EOF
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fi
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# Create a new DKIM key. This creates mail.private and mail.txt
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# in $STORAGE_ROOT/mail/dkim. The former is the private key and
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# the latter is the suggested DNS TXT entry which we'll include
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# in our DNS setup. Note that the files are named after the
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# 'selector' of the key, which we can change later on to support
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# key rotation.
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#
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# A 1024-bit key is seen as a minimum standard by several providers
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# such as Google. But they and others use a 2048 bit key, so we'll
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# do the same. Keys beyond 2048 bits may exceed DNS record limits.
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if [ ! -f "$STORAGE_ROOT/mail/dkim/mail.private" ]; then
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opendkim-genkey -b 2048 -r -s mail -D $STORAGE_ROOT/mail/dkim
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fi
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# Ensure files are owned by the opendkim user and are private otherwise.
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chown -R opendkim:opendkim $STORAGE_ROOT/mail/dkim
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chmod go-rwx $STORAGE_ROOT/mail/dkim
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tools/editconf.py /etc/opendmarc.conf -s \
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"Syslog=true" \
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"Socket=inet:8893@[127.0.0.1]"
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# Add OpenDKIM and OpenDMARC as milters to postfix, which is how OpenDKIM
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# intercepts outgoing mail to perform the signing (by adding a mail header)
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# and how they both intercept incoming mail to add Authentication-Results
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# headers. The order possibly/probably matters: OpenDMARC relies on the
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# OpenDKIM Authentication-Results header already being present.
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#
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# Be careful. If we add other milters later, this needs to be concatenated
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# on the smtpd_milters line.
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#
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# The OpenDMARC milter is skipped in the SMTP submission listener by
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# configuring smtpd_milters there to only list the OpenDKIM milter
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# (see mail-postfix.sh).
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tools/editconf.py /etc/postfix/main.cf \
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"smtpd_milters=inet:127.0.0.1:8891 inet:127.0.0.1:8893"\
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non_smtpd_milters=\$smtpd_milters \
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milter_default_action=accept
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# Restart services.
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restart_service opendkim
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restart_service opendmarc
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restart_service postfix
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