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1.1 KiB
1.1 KiB
Dev servers: ocadev2 ocadev3 ocadev4
AO Dev servers: once-dev1
On development servers, add this to firewall rules to block
sending/receiving of mails.
Block outgoing traffic to email ports...
SMTP, POP, IMAP, plus encrypted ports
Be sure to put before this line in the firewall rules:
-A OUTPUT -j ACCEPT
Allow only communications to localhost on port 25 ( -s IP )
-A OUTPUT -p tcp --dport 25 -o lo -d 127.0.0.1 -j ACCEPT
Allow only communications to localhost on IMAP port 993 ( -s IP )
-A OUTPUT -p tcp --dport 993 -o lo -d 127.0.0.1 -j ACCEPT
Block SMTP
-A OUTPUT -p tcp --dport 25 -j REJECT -A INPUT -p tcp --dport 25 -j REJECT
Block POP
-A OUTPUT -p tcp --dport 110 -j REJECT -A INPUT -p tcp --dport 110 -j REJECT
Block IMAP
-A OUTPUT -p tcp --dport 143 -j REJECT -A INPUT -p tcp --dport 143 -j REJECT
Block Email Submission
-A OUTPUT -p tcp --dport 587 -j REJECT -A INPUT -p tcp --dport 587 -j REJECT
Block encrypted IMAPS
-A OUTPUT -p tcp --dport 993 -j REJECT -A INPUT -p tcp --dport 993 -j REJECT
Block encrypted POP
-A OUTPUT -p tcp --dport 995 -j REJECT -A INPUT -p tcp --dport 995 -j REJECT