on the blacklist.
Figure 6.2. HTTP ALG Processing Order
Using Wildcards in White and Blacklists
Entries made in the white and blacklists can make use of
wildcarding
to have a single entry be
equivalent to a large number of possible URLs. The wildcard character "
*
" can be used to
represent any sequence of characters.
For example, the entry
*.example.com
will block all pages whose URLs end with
example.com
.
If we want to now explicitly allow one particular page then this can be done with an entry in the
whitelist of the form
my_page.example.com
and the blacklist will not prevent this page from
being reachable since the whitelist has precedence.
Deploying an HTTP ALG
As mentioned in the introduction, an
HTTP ALG
object is brought into use by first associating it
with a service object and then associating that service object with an IP rule in the IP rule set. A
number of predefined HTTP services could be used with the ALG. For example, the http service
might be selected for this purpose. As long as the associated service is associated with an IP rule
then the ALG will be applied to traffic targeted by that IP rule.
With HTTPS, the traffic is encrypted and the HTTP ALG can therefore only perform two actions on
this traffic:
•
URL filtering.
•
Web content filtering.
This should be kept in mind when the service used with the ALG includes HTTPS (for example,
when using the http-all service).
Chapter 6: Security Mechanisms
431
Содержание NetDefendOS
Страница 30: ...Figure 1 3 Packet Flow Schematic Part III Chapter 1 NetDefendOS Overview 30 ...
Страница 32: ...Chapter 1 NetDefendOS Overview 32 ...
Страница 144: ...Chapter 2 Management and Maintenance 144 ...
Страница 220: ... Enable DHCP passthrough Enable L2 passthrough for non IP protocols 4 Click OK Chapter 3 Fundamentals 220 ...
Страница 267: ... SourceNetwork lannet DestinationInterface any DestinationNetwork all nets 4 Click OK Chapter 3 Fundamentals 267 ...
Страница 284: ...Chapter 3 Fundamentals 284 ...
Страница 360: ...The ospf command options are fully described in the separate NetDefendOS CLI Reference Guide Chapter 4 Routing 360 ...
Страница 392: ...Chapter 4 Routing 392 ...
Страница 396: ...Web Interface 1 Go to Network Ethernet If1 2 Select Enable DHCP 3 Click OK Chapter 5 DHCP Services 396 ...
Страница 419: ... Host 2001 DB8 1 MAC 00 90 12 13 14 15 5 Click OK Chapter 5 DHCP Services 419 ...
Страница 420: ...Chapter 5 DHCP Services 420 ...
Страница 424: ...2 Now enter Name lan_Access Action Expect Interface lan Network lannet 3 Click OK Chapter 6 Security Mechanisms 424 ...
Страница 573: ...Chapter 6 Security Mechanisms 573 ...
Страница 575: ...This section describes and provides examples of configuring NAT and SAT rules Chapter 7 Address Translation 575 ...
Страница 607: ...Chapter 7 Address Translation 607 ...
Страница 666: ...Chapter 8 User Authentication 666 ...
Страница 775: ...Chapter 9 VPN 775 ...
Страница 819: ...Chapter 10 Traffic Management 819 ...
Страница 842: ...Chapter 11 High Availability 842 ...
Страница 866: ...Default Enabled Chapter 13 Advanced Settings 866 ...
Страница 879: ...Chapter 13 Advanced Settings 879 ...