Firewalls for dummies 2nd edition phần 2

... are reserved for private use and won’t be used on the Internet ߜ 10.0.0.0–10 .25 5 .25 5 .25 5 (=10.0.0.0/8) ߜ 1 72. 16.0.0–1 72. 31 .25 5 .25 5 (=1 72. 16.0.0/ 12) ߜ 1 92. 168.0.0–1 92. 168 .25 5 .25 5 (=1 92. 168.0.0/16) ... allocated for use only on private networks and between computers that aren’t connected to the Internet These private IP address ranges are 10.0.0.0–10 .25 5 .25 5 ....

Ngày tải lên: 04/12/2015, 19:57

... Firewalls FOR DUMmIES ‰ 2ND EDITION by Brian Komar, Ronald Beekelaar, and Joern Wettern, PhD Firewalls For Dummies , 2nd Edition Published by Wiley Publishing, ... Setting Up Firewalls for SOHO or Personal Use 17 1 Chapter 11 : Creating Demilitarized Zones with a Single Firewall 17 9 Chapter 12 : Designing Demilitarized Zones with Multiple Firewalls 19 7 Part ......

Ngày tải lên: 14/08/2014, 02:20

... IP: Port TCP 10.1.65.2: 430 5 23. 1.4.10:6004 39 .4.18. 13: 80 Note that firewalls normally not let you see the list of current dynamic address mappings In this example, port 430 5 is chosen by the internal ... firewall to collect and remember information per user over time and must include mechanisms for coordinating the information if multiple firewalls are used for the same purpos...

Ngày tải lên: 14/08/2014, 02:20

... TCP 172.16.1.0/ 24 Any Any 46 5 Allow HTTP TCP 172.16.1.0/ 24 Any Any 80 Allow HTTPS TCP 172.16.1.0/ 24 Any Any 44 3 Allow LDAP TCP 172.16.1.0/ 24 Any Any 389 Allow LDAPS TCP 172.16.1.0/ 24 Any Any 636 ... 172.16.1.0/ 24 Any Any 110 Allow POP3/S TCP 172.16.1.0/ 24 Any Any 995 Allow IMAP TCP 172.16.1.0/ 24 Any Any 143 Allow IMAP/S TCP 172.16.1.0/ 24 Any Any 993 Allow SMTP TCP 172.16...

Ngày tải lên: 14/08/2014, 02:20

... Action NAT-D UDP Any Any 23.23.2. 35 500 Allow NAT-T UDP Any 450 0 23.23.2. 35 450 0 Allow NAT-D UDP Any Any 172.16.1.211 50 0 Allow NAT-T UDP Any Any 172.16.1.211 450 0 Allow Note: The remote-access ... Internal IP Address Internal Port 23.16.16 .5 UDP Any 192.168.223.22 50 0 23.16.16 .5 UDP Any 192.168.223.22 450 0 Note: The source port can’t be determined for both NAT-D and NAT-T t...

Ngày tải lên: 14/08/2014, 02:20

... 12 -6 Table 12 -6 L2TP with NAT-T Static Address Mapping External IP Address Transport Protocol External Port Internal IP Address Internal Port 23. 16. 16. 5 UDP 500 192. 168 .223.22 500 23. 16. 16. 5 ... mask — for the subnet mask For example, -s 192. 168 .1.1 indicates a packet from the IP address 192. 168 .1.1 -s 192. 168 .1.0/24 indicates a packet from any address between 192. 168 ....

Ngày tải lên: 14/08/2014, 02:20

... 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 firewalls, many users use the ... packets for which you have configured rules at the firewall ߜ Monitor outgoing traffic: Personal firewalls have their own special version of scanning for outgoing traffic Whereas enterp...

Ngày tải lên: 14/08/2014, 02:20

... network 192.1 68. 8.1 ISA server 192.1 68. 8.2 ISA server Internet 23.10.10.200 192.1 68. 1.1 Figure 16-14: A network with a back-toback DMZ Web server 192.1 68. 8 .80 Mail server 192.1 68. 8.25 Chapter ... 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 Editio...

Ngày tải lên: 14/08/2014, 02:20

... support static mapping to map a public network IP address to an RFC 191 8 address For more information about NAT, see Chapter For more information about private IP addressing, see Chapter 361 362 Part ... only one Internet site for security information, www infosyssec.org should be the one The InfoSysSec (Information System Security) bills itself as the “Security Portal for Informatio...

Ngày tải lên: 14/08/2014, 02:20

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Ngày tải lên: 14/08/2014, 02:20

... Chapter 2: Prepping Your Computer for Linux people Linux, but more importantly for my purposes, it’s useful for rescuing machines that can’t boot and resizing ... in Figure 2- 12 • In Windows 20 00, choose Start➪Control Panel➪System➪ Hardware➪Device Manager to access the list of hardware installed on your machine, as shown in Figure 2- 13 Figure 2- 12: In Windows ... Windows 98...

Ngày tải lên: 09/08/2014, 04:21

... C FOR DUMmIES ‰ 2ND EDITION by Dan Gookin C FOR DUMmIES ‰ 2ND EDITION C FOR DUMmIES ‰ 2ND EDITION by Dan Gookin C For Dummies 2nd Edition , Published by Wiley Publishing, Inc 11 1 River ... 13 1 Chapter 11 : C More Math and the Sacred Order of Precedence 13 3 Chapter 12 : C the Mighty if Command .14 7 Chapter 13 : What If C= =C? .16 5 Chapter...

Ngày tải lên: 12/08/2014, 09:21

... KITTY .C Chapter 7: A + B = C Compile KITTY .C If you get any errors, reedit your source code Check for missing semicolons, misplaced commas, and so on Then recompile Running the program is covered ... METHUS4 .C program is eerily similar to METHUS3 .C It has only a few deviations, so you can edit the METHUS3 .C source code and then save it to disk as METHUS4 .C Cross-check your wo...

Ngày tải lên: 12/08/2014, 09:21

... need a specific function Some versions of GCC for Windows use the getch() and getche() functions, which can read text directly from the keyboard and lack the standard input problems of getchar() ... the C programming com­ munity for using it, I recommend using curly braces with your if statements until you feel comfortable reading the C language Chapter 12: C the Mighty if Command...

Ngày tải lên: 12/08/2014, 09:22