RBls behine the firewall

[Mudasar]

Hi,

We are getting very high spams volume, I have few questions regarding RBLS access behind the firewall, i have added the following RSLs in web interface

dnsbl.njabl.org
cbl.abuseat.org
bl.spamcop.net
zen.spamhaus.org
relays.mail-abuse.org

Please let me know which ports should i open to access these RBL sites.

[phoenix]

Please let me know which ports should i open to access these RBL sites.

You shouldn't need to open any ports if your server can do an internet DNS lookup.

[Mudasar]

Thanks for your quick reply,

For outbound traffic we have opened only 53(DNS) and 25(smtp) ports.
How does it possible that it only 53 port required to access external RBLS.


MY

[phoenix]

How does it possible that it only 53 port required to access external RBLS. :confused

There's plenty of details here: +rbl +dns - Yahoo! Search Results

[Mudasar]

There is information but not i am looking for.
I am still still able to find the ports required for external RBLs

[phoenix]

There is information but not i am looking for.

There's plenty of answers in the information I've given you if you read itr and I've already answered your question

I am still still able to find the ports required for external RBLs

If you can do an external lookup then you do not need any additional ports, you already have the correct port open.