WIP.

[config] / all_new_2018 / linkable_etc_files / server / etc / iptables / rules.v4

diff --git a/all_new_2018/linkable_etc_files/server/etc/iptables/rules.v4 b/all_new_2018/linkable_etc_files/server/etc/iptables/rules.v4
index faf35c17889b9e4de54a2c1f0a60fc391737f419..fa4882dfa1340e80cbee94ce5758c5a03a1e95a8 100644 (file)
--- a/all_new_2018/linkable_etc_files/server/etc/iptables/rules.v4
+++ b/all_new_2018/linkable_etc_files/server/etc/iptables/rules.v4
@@ -2,13 +2,21 @@
 :INPUT DROP [0:0]
 :FORWARD DROP [0:0]
 :OUTPUT ACCEPT [0:0]
+# otherwise self-referential connections to local host will fail
 -A INPUT -i lo -j ACCEPT
+# this enables ping etc.
 -A INPUT -p icmp -j ACCEPT
+# SSH
 -A INPUT -p tcp --dport 22 -j ACCEPT
+# HTTPS in theory, in practice my second SSH port, see sshd_config
 -A INPUT -p tcp --dport 443 -j ACCEPT
+# SMTP (allowing for STARTTLS); necessary for mail server to mail server banter
 -A INPUT -p tcp --dport 25 -j ACCEPT
+# SMTPS, for mail server to mail user agent communication
 -A INPUT -p tcp --dport 465 -j ACCEPT
+# IMAPS
 -A INPUT -p tcp --dport 993 -j ACCEPT
+# tolerate any inbound connections requested by our server, no matter the port
 -A INPUT -m state --state RELATED,ESTABLISHED -j ACCEPT
 COMMIT
-# iptables-restore seems to ignore COMMIT if no newline follows it
\ No newline at end of file
+# this last line is here because iptables-restore ignores the final command if no newline follows it
\ No newline at end of file