Data moves around the internet through ports. When a port is blocked, data can't move through it. There are certain ports that aren't necessary for everyday internet use, but they are commonly used for network attacks. Blocking these ports helps to protect our users from security threats.
Ports blocked by default
The following ports are blocked by default:
- Port 25 (SMTP) incoming/outgoing - except to iiNet email servers i.e. mail.iinet.net.au
- Port 80 (http) incoming
- Port 135 (netBIOS) incoming
- Port 139 (netBIOS) incoming
- Port 443 (https) incoming
- Port 445 (TCP/UDP) incoming
ULTRA Broadband Cable port blocking
Please note that port blocking for ULTRA Broadband Cable services CANNOT be disabled due to security reasons.
- Port 25 (SMTP) incoming/outgoing - except to iiNet email servers e.g. mail.iinet.net.au
- Port 53 (TCP/UDP) incoming
- Port 135 (netBIOS) incoming
- Port 137 (TCP/UDP) incoming
- Port 139 (netBIOS) incoming
- Port 389 (TCP/UDP) incoming
- Port 445 (TCP/UDP) incoming
- Port 593 (TCP/UDP) incoming
How to disable default port blocking
Some advanced users such as business customers or people running their own servers may need to disable the default port blocking so they can continue their day to day operations.
- Log in to Toolbox.
- Select your broadband service.
- Select Settings, or Manage port blocking.
- Set the Port blocking switch to OFF and then click Change settings to finish. If this button is not present in your Toolbox, changes will be saved automatically.
- Your changes may take up to 15 minutes to take effect.
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