simply one here but just wanting to get some clarify the changes I have made to our firewall are correct.
I am wanting to restrict access to SMTP port 25 to potentially prevent future SPAM attacks, and we are currently using a Cisco RV042 as our firewall and I have modified the access rule for SMTP port 25 as follows:
Source Interface: LAN
Source IP: Any
Destination IP: IP address of the Exchange server
Mail flows fine using the above config, but like I said I am just wanting to confirm that the above is correct in terms of correctly locking down the port?
If anyone has any further tips and or advice that would be greatly appreciated.