Good Net Neighbor - Level Two

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GNN Level Two will implement access control lists to block outbound traffic to port 25 (Simple Mail Transport Protocol—SMTP) from all systems except known, designated mail servers within your organization or network. Many bots, worms and viruses have their own SMTP engines and use those engines to send spam, viruses and phishing schemes from infected devices. By only allowing traffic to port 25 from specific IP addresses, you will be less likely to end up on a blacklist. This configuration is considered a best practice, and many commercial Internet service providers have implemented such services for their customers.

NOTE: Customers should be aware that this service is not a substitute for patching/updating machines or using anti-virus protection.

All MOREnet Internet connections are eligible for this service.

Signing Up for GNN Level Two

  1. Log in to your MyMOREnet account and select the Help Desk Ticket Management application.
  2. Click Submit a Ticket to Technical Support and create a new ticket for your organization.
  3. Set the ticket's category to Internet Security.
  4. A pop-up dialog box will appear indicating that all MyMOREnet users in your organization can view this data. Click OK.
  5. Enter text describing what you would like to have configured or paste the text below into the Describe the Problem or Request field.
I would like to sign up for GNN Level Two, the SMTP port blocking service. The IP Address of our mail server is XXX.XXX.XXX.XXX.

NOTE: You may have more than one device that legitimately sends mail. Please provide multiple IP addresses if necessary.

Once your ticket has been submitted, we will begin to make the appropriate configuration changes. When the changes are complete, you will be contacted to let you know the GNN Level Two service has been implemented.

If you have questions, contact MOREnet Technical Support at (800) 509-6673.

All services are subject to MOREnet Service Policies.

There is no additional fee for this service.

Support

Support article

Effects of Blocking Port 25

Related Services

Black Hole DNS
Good Net Neighbor - Level One
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