Draytek VigorIPPBX 2820 Series, Руководство пользователя

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VigorIPPBX 2820 Series User’s Guide 189
If you do not have any idea of choosing suitable codepage,
please open Syslog. From Codepage Information of Setup
dialog, you will see the recommended codepage listed on the
dialog box.
Window size – It determines the size of TCP protocol
(0~65535). The more the value is, the better the performance
will be. However, if the network is not stable, small value will
be proper.
Session timeout –Setting timeout for sessions can make the
best utilization of network resources. However, Queue timeout
is configured for TCP protocol only; session timeout is
configured for the data flow which matched with the firewall
rule.
Some on-line games (for example: Half Life) will use lots of fragmented UDP packets to
transfer game data. Instinctively as a secure firewall, Vigor router will reject these
fragmented packets to prevent attack unless you enable “
Accept Incoming Fragmented
UDP Packets ”. By checking this box, you can play these kinds of on-line games. If security
concern is in higher priority, you cannot enable “ Accept Incoming Fragmented UDP
Packets ”.
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Click Firewall and click Filter Setup to open the setup page.
To edit or add a filter, click on the set number to edit the individual set. The following page
will be shown. Each filter set contains up to 7 rules. Click on the rule number button to edit
each rule. Check
Active to enable the rule.