7. Select the network or network set that will be added as a source of the rule and then
click Add, Close, and Next to continue.
8. For destination, click Add and perform the same process, this time selecting the
network or network set that will be the destination set. Click Next when complete.
9. Select the type of relationship to configure, NAT or Route, as shown in Figure 5.8.
Click Next to continue.
10. Review the settings and click Finish.
11. Click Apply and then click OK to enable the new rule.
Understanding Firewall Policy Rules
Firewall policy rules are distinct from network rules in that they define what types of
traffic and applications will be supported between the network segments. For example,
an administrator may want to configure a firewall rule to allow web traffic from internal
clients to the Internet. Firewall policy rules, shown in Figure 5.9, are the heart of ISA??™s
FIGURE 5.8 Creating new network rules.
149
5
Understanding Firewall Policy Rules
firewall functionality. They define what is allowed and what is denied for specific
networks, users, and protocols.
Firewall policy configuration should be well understood before ISA administration is
attempted.
Pages:
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299