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Chapter 3 IP Firewall Service 49
Step 5: Save firewall service changes
Once you have configured your filters and determined which services to allow, save
your changes so the new settings take effect.
Managing Firewall Service
This section gives step-by-step instructions for starting, stopping, and configuring
firewall address groups and filters.
Starting and Stopping Firewall Service
By default, firewall service blocks all incoming TCP connections and allows all UDP
connections. Before you turn on firewall service, make sure you’ve set up filters
allowing access from IP addresses you choose. Otherwise, no one will have access to
your server.
To start or stop firewall service:
1 In Server Admin, choose Firewall from the Computers & Services list.
2 Click Start Firewall.
When the service is started, the Stop Service button is available.
Opening the Firewall for Standard Services
By default, firewall service blocks all incoming TCP connections and allows all UDP
connections. Before you turn on firewall service, make sure you’ve set up filters
allowing access from IP addresses you choose; otherwise, no one will have access to
your server.
You can easily allow standard services through the firewall without advanced and
extensive configuration. Standard services include (but are not limited to):
• Web service
• Apple File service
• Windows File service
• FTP service
• Printer Sharing
Important: If you add or change a filter after starting firewall service, the new filter
will affect connections already established with the server. For example, if you deny
all access to your FTP server after starting firewall service, computers already
connected to your FTP server will be disconnected.
Important: If you add or change a filter after starting firewall service, the new filter
will affect connections already established with the server. For example, if you deny
all access to your FTP server after starting firewall service, computers already
connected to your FTP server will be disconnected.
LL2351.Book Page 49 Monday, September 8, 2003 2:47 PM