Access Control; Figure 13-3: Access Control - AudioCodes MP-20x User Manual

To configure MP-20x's security settings:
(Refer to the figure 'General Security Level Settings')
1. Choose from among the three predefined security levels described in the table above.
'Maximum Security' is the default setting.
Using the Minimum Security setting may expose the home network to
significant security risks, and thus should only be used, when necessary, for
short periods of time.
2. Check the 'Block IP Fragments' check box to protect your home network from a
common type of hacker attack that could make use of fragmented data packets to
sabotage your home network. Note that some UDP-based services make legitimate
use of IP fragments. You need to allow IP fragments to pass into the home network to
make use of these select services.
3. In the 'TCP Session timeout' field, enter the time-to-live (TTL) in units of hours for TCP
sessions. The valid range is 1 to 120 hours (default is an hour).
4. Click OK to save the changes.
13.2

Access Control

You may want to block specific computers within the home network (or even the whole
network) from accessing certain services on the Internet. For example, you may want to
prohibit one computer from surfing the Web, another computer from transferring files using
FTP, and the whole network from receiving incoming e-mail.
Access Control defines restrictions on the types of requests that may pass from the home
network out to the Internet, and thus may block traffic flowing in both directions. In the e-
mail example given above, you may prevent computers in the home network from receiving
e-mail by blocking their outgoing requests to POP3 servers on the Internet.
There are services you should consider blocking, such as popular game and file sharing
servers. For example, to ensure that your employees do not put your business at risk from
illegally traded copyright files, you may want to block several popular P2P and file sharing
applications.
To view and allow/restrict these services:
1. From the sidebar menu, click the Security menu, and in the screen 'Security', click the
Access Control tab; the screen 'Access Control' opens.
MP-20x Telephone Adapter

Figure 13-3: Access Control

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User's Manual
Document #: LTRT-50609