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