Broadlink Firewalling.

Thu Jul 28 11:26:07 PDT 2005 — Broadlink Firewalling. After a number of delays we have applied firewalling to all Broadlink DSL subscribers. The same firewalls for SBC DSL subscribers are available to all Broadlink subscribers but any change to the firewalling configuration must be executed manually by a support. Again, there are three firewall rulesets:

Option One: Complete Inbound TCP Firewalling. This firewall rule set prevents any inbound TCP connections from being established, protecting your system from most types of Internet attacks.

Option Two (the default, recommended by Sonic.net): Common Exploitable Port Firewalling. This is the default firewall rule set applied to DSL circuits. It blocks traffic on port 25 (SMTP email) both to and from a customers circuit to any mail servers other than Sonic.net maintained servers as well as preventing communication on ports used by common Microsoft services that are frequently exploited.

Option Three: Port 25 Firewalling. This firewall rule set only restricts traffic on port 25 (SMTP email) to and from a customers circuit to any mail servers other than sonic.net maintained servers. This is the minimum recommended rule set. This rule set generally prevents your computer from being hijacked and used to send SPAM directly to other mail servers.

Additionally, users may request to have all firewalling disabled.

-Kelsey and Nathan

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