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-rw-r--r--mail-mta/postfix/files/postfix.service6
1 files changed, 6 insertions, 0 deletions
diff --git a/mail-mta/postfix/files/postfix.service b/mail-mta/postfix/files/postfix.service
index 585849e978b3..db585b3e29db 100644
--- a/mail-mta/postfix/files/postfix.service
+++ b/mail-mta/postfix/files/postfix.service
@@ -15,6 +15,12 @@ ProtectSystem=full
ReadWritePaths=-/etc/mail/aliases.db
CapabilityBoundingSet=~ CAP_NET_ADMIN CAP_SYS_ADMIN CAP_SYS_BOOT CAP_SYS_MODULE
MemoryDenyWriteExecute=true
+ProtectKernelModules=true
+ProtectKernelTunables=true
+ProtectControlGroups=true
+RestrictAddressFamilies=AF_INET AF_INET6 AF_NETLINK AF_UNIX
+RestrictNamespaces=true
+RestrictRealtime=true
[Install]
WantedBy=multi-user.target