Changeset 2700

Timestamp:

May 29, 2015, 1:18:37 AM (10 years ago)

Author:

andersk

Message:

Block outgoing port 25

Exceptions are made for localhost, outgoing.mit.edu, and (temporarily)
the cssa user.

Closes: #403

Location:

trunk/server/fedora/config/etc

Files:

• modules-load.d/iptables.conf (modified) (1 diff)
• sysconfig/ip6tables (modified) (1 diff)
• sysconfig/iptables (modified) (1 diff)

trunk/server/fedora/config/etc/modules-load.d/iptables.conf

@@ -4 +4 @@
 ip6_tables
 ip6table_filter
+ip6t_REJECT
+nf_log_ipv6

trunk/server/fedora/config/etc/sysconfig/ip6tables

@@ -5 +5 @@
 :log-smtp - [0:0]
 -A log-smtp -o lo -j RETURN
--A OUTPUT -p tcp -m tcp --dport 25 --tcp-flags FIN,SYN,RST,ACK SYN -j log-smtp
+-A OUTPUT -p tcp -m tcp --dport 25 --syn -j log-smtp
 -A log-smtp -m owner --uid-owner postfix -j RETURN
 -A log-smtp -j LOG --log-prefix "SMTP " --log-uid
+# 536957056=cssa (temporary exception)
+-A log-smtp -m owner --uid-owner 536957056 -j RETURN
+-A log-smtp -j REJECT --reject-with icmp6-adm-prohibited
 COMMIT

trunk/server/fedora/config/etc/sysconfig/iptables

@@ -5 +5 @@
 :log-smtp - [0:0]
 -A INPUT -p udp -m udp --dport 161 ! -s 18.0.0.0/8 -j REJECT
--A OUTPUT -p tcp -m tcp --dport 25 --tcp-flags FIN,SYN,RST,ACK SYN -j log-smtp
+-A OUTPUT -p tcp -m tcp --dport 25 --syn -j log-smtp
 -A log-smtp -o lo -j RETURN
 -A log-smtp -m owner --uid-owner postfix -j RETURN
--A log-smtp -m owner --uid-owner nrpe -j RETURN
--A log-smtp -m owner --uid-owner 537644531 -j RETURN
 -A log-smtp -j LOG --log-prefix "SMTP " --log-uid
+# 18.9.28.100=outgoing.mit.edu
+-A log-smtp -d 18.9.28.100 -j RETURN
+# 536957056=cssa (temporary exception)
+-A log-smtp -m owner --uid-owner 536957056 -j RETURN
+-A log-smtp -j REJECT --reject-with icmp-admin-prohibited
 COMMIT