ZyAIR Wireless Gateway Series User’s Guide
Firewall Screens
12-3
2. Is it possible to modify the rule to be more specific? For example, if IRC is blocked for all users, will a
rule that blocks just certain users be more effective?
3. Does a rule that allows Internet users access to resources on the LAN create a security vulnerability? For
example, if FTP ports (TCP 20, 21) are allowed from the Internet to the LAN, Internet users may be able
to connect to computers with running FTP servers.
4. Does this rule conflict with any existing rules?
Once these questions have been answered, adding rules is simply a matter of plugging the information into
the correct fields in the web configurator screens.
12.3.3 Key Fields For Configuring Rules
Action
Should the action be to
Block
or
Forward
?
“Block” means the firewall silently discards the packet.
Service
Select the service from the
Service
scrolling list box. If the service is not listed, it is necessary to first define
it. See
section 12.5.3
for more information on predefined services.
Source Address
What is the connection’s source address; is it on the LAN or WAN? Is it a single IP, a range of Ips or a
subnet?
Destination Address
What is the connection’s destination address; is it on the LAN or WAN? Is it a single IP, a range of Ips or a
subnet?
12.4 Connection Direction Examples
This section describes examples for firewall rules for connections going from LAN to WAN and from WAN
to LAN.
LAN to LAN/ZyAIR and WAN to WAN/ZyAIR rules apply to packets coming in on the associated interface
(LAN or WAN respectively). LAN to LAN/ZyAIR means policies for LAN-to-ZyAIR (the policies for
managing the ZyAIR through the LAN interface) and policies for LAN-to-LAN (the policies that control
routing between two subnets on the LAN).
Содержание ZYAIR
Страница 1: ...ZyAIR Wireless Gateway Series User s Guide Version 3 50 July 2003...
Страница 20: ......
Страница 26: ......
Страница 28: ......
Страница 36: ......
Страница 58: ......
Страница 66: ......
Страница 98: ......
Страница 99: ...WAN III Part III WAN This part covers the web configurator screen and information about WAN...
Страница 100: ......
Страница 112: ......
Страница 130: ......
Страница 166: ......
Страница 180: ...ZyAIR Wireless Gateway Series User s Guide 15 4 Logs Screens Figure 15 2 Log Settings...
Страница 188: ...Maintenance VII Part VII MAINTENANCE This part describes the Maintenance web configurator screens...
Страница 189: ......
Страница 205: ......
Страница 213: ......
Страница 236: ......
Страница 246: ......
Страница 268: ......
Страница 286: ......
Страница 294: ......
Страница 324: ......
Страница 334: ......
Страница 340: ......
Страница 352: ......
Страница 356: ......
Страница 368: ......
Страница 378: ......