Firewalls For Dummies 2nd Edition phần 4 ppsx

... Port HTTP TCP 172.16.1.0/ 24 Any Any 80 Allow HTTPS TCP 172.16.1.0/ 24 Any Any 44 3 Allow If a Web server on the Internet uses anything other than the default TCP ports of 80 and 44 3, this firewall rule ... POP3/ IMAP4 clients connect from a known range of IP addresses. If you travel for work and connect from a variety of locations, this configuration won’t work for you. ߜ Enforce au...

Ngày tải lên: 14/08/2014, 02:20

... 39 Ports are not only for sailors 40 Some ports are well known 41 Application Layer Protocols 42 HTTP 42 SMTP 43 POP3 43 DNS 43 Telnet 43 Complex protocols 44 FTP 44 Future protocols 45 The Keeper of ... More 383 IP Protocol Numbers 383 ICMP Type Numbers 3 84 TCP and UDP Port Listing 3 84 Index 393 Firewalls For Dummies, 2nd Edition xvi Chapter 14: Configur...

Ngày tải lên: 14/08/2014, 02:20

... data portion (for example, the HTTP data) contains instructions for how long the data is valid or instructions not to cache the result at all. The information is probably encrypted for a good reason ... that case, network traffic for all ports on 23.1 .4. 12 are forwarded to 10.1.65.7. Note that normal packet filters are still used to determine which ports are actually forwarded to the...

Ngày tải lên: 14/08/2014, 02:20

... 192.168.222.10 Any 39.100. 24. 53 53 Allow DNS TCP 192.168.222.10 Any 39.100. 24. 53 53 Allow HTTP TCP 192.168.222.0/ 24 Any Any 80 Allow HTTPS TCP 192.168.222.0/ 24 Any Any 44 3 Allow In this example, ... Firewall Building a Case for Multi-Pronged Firewalls In some cases, you may require more than three zones for a firewall. Based on the examples discussed already, you can make a ca...

Ngày tải lên: 14/08/2014, 02:20

... Client Tunnel server Internet 23.16.16.5 39.100. 24. 5 External client 192.168.223.22 192.168.223.0/ 24 192.168.222.3 192.168.222.0/ 24 Figure 12 -4: A two- firewall DMZ for L2TP services that support NAT-T 205 Chapter ... software for Windows 98, Windows Me, or Windows NT 4. 0 from Microsoft’s Web site at www.microsoft.com. Internet Connection Sharing: NAT for Dummies Starting w...

Ngày tải lên: 14/08/2014, 02:20

... ensure that no private information is sent to the Internet without your knowledge. For all outgoing Web, instant messaging, and e-mail traffic, the firewall scans for private information about you. ... report the excessive intrusion attempts. ߜ Performance: Of course you want performance — who doesn’t? — but this is usually not a problem for personal firewalls. With enterprise fire- wa...

Ngày tải lên: 14/08/2014, 02:20

... and the Enterprise Edition, and you begin to wonder, “Which of these editions is right for me?” Because the Enterprise Edition is considerably more expensive than the Standard Edition, examine what ... as an array, make sure that you understand all the implications. For more information on this topic, see Active Directory For Dummies, by Marcia R. Loughry (published by Wiley Publis...

Ngày tải lên: 14/08/2014, 02:20

... determine what log formats are supported by the firewall. For example, does the firewall support recording data to a database, or does it store the information in propri- etary log file formats? The ... consult is this book, of course.) ICSA Labs has certified over 40 firewalls, and this section gives you product information and lab reports for each of them. See how the firewall that yo...

Ngày tải lên: 14/08/2014, 02:20

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Ngày tải lên: 14/08/2014, 02:20

... deviation 5 4. 05 0.27 6.37 0 .48 10 4. 08 0.3 6 .44 0.5 20 4. 33 0 .49 6. 74 0 .47 30 5.36 0. 64 7.51 0.57 40 9.5 1.51 10 .4 1.38 4. 2.7 Fast Power Control and User Equipment Speed The SIR target for the closed-loop ... 72.1 0.27 0.13 0 .49 32.1 Macro 12 23.3 0 .43 0 .42 0.19 35.3 13 26.7 1.10 0.39 0.28 35.5 14 44. 7 0.83 0.28 0 .41 36.9 15 11.7 0.82 0. 24 0.12 34. 3 Mean (all...

Ngày tải lên: 14/08/2014, 12:21