config.m4: Present a LetsEncrypt certificate to external clients.

[exim-config] / config.m4

diff --git a/config.m4 b/config.m4
index 94d33603035a69f2a5858353281d195eff8c278c..a9b30b891c27fbc1e8b1e0be5827883e1c7787e2 100644 (file)
--- a/config.m4
+++ b/config.m4
@@ -24,6 +24,13 @@
 ## Master domain name.
 DEFCONF(master_domain, distorted.org.uk)
 
+## List of home-system mail domain names.  This can be empty if we only
+## provide service for special-purpose domains.
+DEFCONF(sysdomains, CONF_master_domain)
+
+## The magic token for local header names.
+DEFCONF(header_token, Distorted)
+
 ## The smarthost for satellite hosts.
 DEFCONF(smarthost, mail.distorted.org.uk)
 
@@ -32,6 +39,7 @@ DEFCONF(filter_user, Debian-exim)
 
 ## Administrative groups.
 DEFCONF(admin_groups, root : adm)
+DEFCONF(trusted_groups, root : adm)
 
 ## Where the spam filter is.
 DEFCONF(spamd_address, 172.29.199.179)
@@ -40,6 +48,9 @@ DEFCONF(spamd_port, 783)
 ## Default spam limit for incoming mail (multiplied by ten).
 DEFCONF(spam_max, 50)
 
+## Userv stuff for debugging.
+DEFCONF(userv_opts, )
+
 ## Which interfaces to listen on.  Exim checks for the literal string `::0'
 ## when setting things up: don't use `::', or we'll be tripped up by Linux's
 ## demented non-`IPV6_V6ONLY' behaviour.
@@ -59,11 +70,21 @@ DEFCONF(ca_dir, /etc/ca)
 
 ## User address suffix handling.
 DEFCONF(user_suffix_list, +* : -*)
-DEFCONF(user_extaddr_regexp, $acl_c_user([-+@]|\$))
 DEFCONF(user_extaddr_fixup, ${sg {$local_part_suffix}{^[-+]}{}})
 
 ## Other hosts allowed to relay mail through us.
-DEFCONF(relay_clients, +trusted)
+DEFCONF(relay_clients, <m4_dnl
+; +trusted m4_dnl
+; 172.31.80.8 m4_dnl chiark (VPN)
+; 172.29.198.161 ; 2001:ba8:1d9:a000::1:1 m4_dnl national
+)
+
+## TLS certificate list.
+DEFCONF(certlist,
+<:m4_ifelse(t, m4_ifelse(MODE, hub, nil, MODE, srv, nil, t),
+<:CONF_sysconf_dir/server.certlist:>,
+<:CONF_sysconf_dir/${if match_ip{$sender_host_address}{+trusted} \
+       {server}{letsencrypt}}.certlist:>):>)
 
 ## TLS-related settings.  We're assuming GNUTLS here, rather than OpenSSL.
 ## For local connections we are very strict.  For random clients, we try
@@ -71,14 +92,31 @@ DEFCONF(relay_clients, +trusted)
 ## nobody can verify our certificate anyway.
 DEFCONF(good_ciphers, NONE<::>m4_dnl
 :+VERS-TLS1.2:+VERS-TLS1.1:+VERS-TLS1.0<::>m4_dnl
-:+DHE-RSA:+DHE-DSS<::>m4_dnl
-:+AES-256-CBC:+AES-128-CBC<::>m4_dnl
-:+SHA256:+SHA384:+SHA512:+SHA1<::>m4_dnl
-:+SIGN-RSA-SHA512:+SIGN-RSA-SHA384:+SIGN-RSA-SHA256:+SIGN-DSA-SHA256<::>m4_dnl
+:+ECDHE-RSA:+ECDHE-ECDSA:+DHE-RSA:+DHE-DSS<::>m4_dnl
+:+CHACHA20-POLY1305<::>m4_dnl
+:+AES-256-GCM:+AES-128-GCM:+AES-256-CBC:+AES-128-CBC<::>m4_dnl
+:+AEAD:+SHA256:+SHA384:+SHA512<::>m4_dnl
+:+SIGN-RSA-SHA512:+SIGN-RSA-SHA384:+SIGN-RSA-SHA256<::>m4_dnl
+:+SIGN-ECDSA-SHA512:+SIGN-ECDSA-SHA384:+SIGN-ECDSA-SHA256<::>m4_dnl
+:+SIGN-DSA-SHA256<::>m4_dnl
+:+CURVE-X25519:+CURVE-SECP256R1:+CURVE-SECP521R1:+CURVE-SECP384R1<::>m4_dnl
 :+CTYPE-X.509<::>m4_dnl
 :+COMP-NULL<::>m4_dnl
 )
-DEFCONF(acceptable_ciphers, NORMAL<::>m4_dnl
+DEFCONF(acceptable_ciphers, NONE<::>m4_dnl
+:+VERS-TLS-ALL<::>m4_dnl
+:+ECDHE-RSA:+ECDHE-ECDSA<::>m4_dnl
+:+KX-ALL<::>m4_dnl
+:+SIGN-ALL<::>m4_dnl
+:+CTYPE-ALL<::>m4_dnl
+:+CHACHA20-POLY1305<::>m4_dnl
+:+AES-256-GCM:+AES-128-GCM<::>m4_dnl
+:+CIPHER-ALL<::>m4_dnl
+:+CURVE-X25519<::>m4_dnl
+:+CURVE-ALL<::>m4_dnl
+:+AEAD<::>m4_dnl
+:+MAC-ALL<::>m4_dnl
+:+COMP-NULL<::>m4_dnl
 :-MD5<::>m4_dnl
 )