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authorGuilhem Moulin <guilhem@fripost.org>2017-05-31 21:42:32 +0200
committerGuilhem Moulin <guilhem@fripost.org>2017-06-01 01:09:00 +0200
commit6e39bad3fbe75b88fca4c2e2aad8eb51af14b1be (patch)
tree87898c1653a36f1b23efbef55d6f876d8bc83444 /roles/MSA/etc/systemd
parente136d3edbdb6749d4559939dc9fcbc11d166e34c (diff)
Don't let authenticated client use arbitrary sender addresses.
The following policy is now implemented: * users can use their SASL login name as sender address; * alias and/or list owners can use the address as envelope sender; * domain postmasters can use arbitrary sender addresses under their domains; * domain owners can use arbitrary sender addresses under their domains, unless it is also an existing account name; * for known domains without owner or postmasters, other sender addresses are not allowed; and * arbitrary sender addresses under unknown domains are allowed.
Diffstat (limited to 'roles/MSA/etc/systemd')
-rw-r--r--roles/MSA/etc/systemd/system/postfix-sender-login.service23
-rw-r--r--roles/MSA/etc/systemd/system/postfix-sender-login.socket8
2 files changed, 31 insertions, 0 deletions
diff --git a/roles/MSA/etc/systemd/system/postfix-sender-login.service b/roles/MSA/etc/systemd/system/postfix-sender-login.service
new file mode 100644
index 0000000..3ceb310
--- /dev/null
+++ b/roles/MSA/etc/systemd/system/postfix-sender-login.service
@@ -0,0 +1,23 @@
+[Unit]
+Description=Postfix sender login socketmap
+After=mail-transport-agent.target
+Requires=postfix-sender-login.socket
+
+[Service]
+User=postfix
+Group=postfix
+StandardInput=null
+SyslogFacility=mail
+ExecStart=/usr/local/bin/postfix-sender-login.pl
+
+# Hardening
+NoNewPrivileges=yes
+PrivateDevices=yes
+ProtectHome=yes
+ProtectSystem=full
+ReadOnlyDirectories=/
+RestrictAddressFamilies=AF_UNIX
+
+[Install]
+WantedBy=multi-user.target
+Also=postfix-sender-login.socket
diff --git a/roles/MSA/etc/systemd/system/postfix-sender-login.socket b/roles/MSA/etc/systemd/system/postfix-sender-login.socket
new file mode 100644
index 0000000..c883dc1
--- /dev/null
+++ b/roles/MSA/etc/systemd/system/postfix-sender-login.socket
@@ -0,0 +1,8 @@
+[Socket]
+SocketUser=postfix
+SocketGroup=postfix
+SocketMode=0666
+ListenStream=/var/spool/postfix-msa/private/sender-login
+
+[Install]
+WantedBy=sockets.target