Linux Internet Server : Visual Black Book Book

	Introduction	xvii
Chapter 1	Creating An Internet Server On Linux	1
1.1	Creating An Internet Server	2
	What Type Of OS Is Linux?	2
	Linux Is Intimately Connected With The Internet	3
	Red Hat Linux 6.0	3
1.2	What Is An Internet Server?	4
	Internet Use Means Server Use	4
	Types And Roles Of Internet Servers	5
1.3	Using An Internet Server	6
	A Dedicated Connection Is A Necessity For An Internet Server	6
	Making It Possible To Own An Internet Server	7
	Advantages Of A Dedicated Connection	7
1.4	Let's Identify The Main Stages Of Construction	8
Chapter 2	Internet Basics	11
2.1	Understanding The Internet	12
	An ISP Has One Network Within The Internet	13
2.2	How The Internet Is Connected	14
	Individual Networks Are Connected By Routers	14
	Many Types Of Routers	15
2.3	Understanding TCP/IP	16
	What Is TCP/IP?	16
	Use Of IP Addresses	17
	Understanding The Meaning Of A Net Mask	18
2.4	Understanding Domain Names	20
	Domain Name Notation	20
	Attribute Type Domain Names And Location Type Domain Names	21
2.5	Understanding The Relationship Between IP Addresses And Domain Names	22
	Host Names And Domain Names	22
	Host Names And IP Addresses	23
	Role Of The DNS Server	23
2.6	What Services Will The Server Provide?	24
	One Computer Can Run Several Servers	24
	Services And Protocols	25
Chapter 3	The Permanent Connection	27
3.1	Why Do You Need A Dedicated Line?	28
	Ethernet Is Used To Construct A LAN	29
3.2	Getting Permanently Connected	30
	The Higher The Speed, The Higher The Price	30
	What Is A Dedicated Line?	30
	A Permanent Connection At Low Cost	31
	Types Of Permanent Connections Available	31
3.3	Your Own Domain Name	32
	Domain Name Search	32
	Applying For A Domain Name	33
3.4	The Router	34
	Role Of The Router	34
	Points To Consider In Selecting A Router	35
	The 1200i	35
3.5	The Big Picture	36
	Key Points In Establishing Your Permanent Presence On The Internet	36
	The Key Points In Detail	37
3.6	What You Need For Your Local Network	40
	Network Interface Cards	41
	Network Cables	41
	Hubs	42
	When You Want To Connect More Devices To Your Network	42
Chapter 4	Installing Linux	45
4.1	Things To Know Before Installing Linux	46
	Internet Environment To Be Used In This Book	46
	List Of Network Settings For dekiru.gr.jp, The Example Used In This Chapter	47
4.2	Connecting Your LAN To The Internet	48
4.3	Preparing The PC For The Installation	52
	Preparations For Installing Linux	52
	Preparing The PC For Linux Installation	53
4.4	Creating An Installation Disk	54
4.5	Installing Linux	56
4.6	Installing Linux, Part 2	60
	Creating Partitions Suitable For An Internet Server	60
4.7	Installing Linux, Part 3	66
	When An ATAPI CD-ROM Drive Is Not Recognized	74
	Booting Problems After Installation	74
Chapter 5	Mastering The Basic Operations Of Linux	77
5.1	Working In Linux	78
	How To Start Working With Linux	78
	Working With Linux Begins With Login	79
5.2	Understanding Directories	80
	A Linux Directory Is The Same As A Windows Folder	80
5.3	Using Commands	82
	Commands And Their Arguments	82
5.4	Mastering Basic Commands	84
	Remember These Essential Linux Commands	84
5.5	Understanding Permissions	86
	Permissions Represent File Or Directory Access Rights	86
5.6	Creating Users	88
	Role Of A User	89
5.7	Changing Passwords	90
	A Password Is An Important Key	91
5.8	Editing Configuration Files	92
	Getting Familiar With The Command And Input Modes	92
	Basic vi Text Editor	93
Chapter 6	Creating A DNS Server	97
6.1	How A DNS Server Works	98
	The DNS Is A Service That Associates Hostnames And IP Addresses	98
	Primary And Secondary DNS Servers	99
6.2	Creating A DNS Server	100
	Using BIND To Create A DNS Server	101
6.3	Creating A DNS Server, Part 2	102
6.4	Creating a DNS Server, Part 3	104
	Basic Structure Of Records	105
6.5	Creating A DNS Server, Part 4	106
6.6	Creating A DNS Server, Part 5	108
6.7	Testing The DNS Server	110
	Look Up An IP Address From A Hostname	110
	Look Up A Hostname From An IP Address	111
	Always Increase The Serial Number When You Change A Configuration File	111
6.8	Testing The DNS Server, Part 2	112
	Confirming Whether Host For Exchanging Mail Is Defined	112
	Look Up The IP Address Of A Remote Host	113
	Use A Remote DNS Server To Look Up The Address Of A Hostname	113
Chapter 7	Creating A Mail Server	115
7.1	How Mail Works	116
	Role Of The Mail Server	116
	Functions Of Sendmail And qpopper	117
7.2	Installing Mail Server Software	118
7.3	Creating A Mail Server	120
	How Mail Delivery Works	124
7.4	Creating A Mail Server, Part 2	126
	IMAP Can Be Used Instead Of POP	129
7.5	Creating A Shared Mail Account	130
	Transferring Mail Addressed To root To Another User	130
	The /etc/aliases File Links A Set Of Mail Addresses To One Another	131
	Simultaneously Sending The Same Mail To Multiple Recipients	132
	Creating A Mailing List	132
	If The Mailing List Gets Too Big	133
7.6	Enhancing Mail Security	134
	Setting An APOP Password	134
	Required Settings For The Mail Client	135
	Deleting An APOP Password	135
Chapter 8	Creating A Web Server	137
8.1	How Web Pages Are Displayed	138
	How Web Pages Are Displayed	138
	Role Of Apache	139
8.2	Installing Your Web Server	140
8.3	Customizing Your Web Server	144
	You Can Freely Set How A Browser Will Be Able To See Your Site	144
	Transferring Mail Addressed To root To Another User	144
	Adding A New Index File	145
	Changing The Name Of The Directory That Will Be Used For A User's Web Pages	146
	Creating A Web Page For Each Linux User	146
	Redirecting A Specific URL	147
8.4	Using Hostnames Other Than www With The Web Server	148
Chapter 9	Using An Internet Server From A Client PC	151
9.1	Connecting A LAN To The Internet	152
	Range Of Private IP Addresses	153
9.2	How To Connect Client PCs To The Internet	154
	How NAT Works	154
	Two Network Cards Are Required	155
	NAT And IP Masquerading	155
9.3	Using An Internet Server From A LAN	156
	Use The Same Kind Of Card For The Second Network Card	157
9.4	Using An Internet Server From A LAN, Part 2	158
9.5	Using An Internet Server From A LAN, Part 3	162
9.6	Automatically Assigning IP Addresses	164
	If The Internet Cannot Be Accessed From A Client	166
9.7	How A Proxy Server Works	170
	Role Of A Proxy	170
9.8	Creating A Proxy Server	172
	Configuring The Client	175
Chapter 10	Operating A Secure Internet Server	177
10.1	Protecting Your Internet Server From Unauthorized Access	178
	What Is Security?	178
	Restricting Access By Using tcpd	180
	Encrypting Passwords	181
	Upgrading The Software Version	183
	ncftp Command Reference	184
	Discovering An Unauthorized Entry	184
	Useful Server Security Web Sites	185
10.2	Minimizing Internet Server Problems	186
	How To Verify The Size Of The File System	186
	Backing Up Configuration Files	187
	Restoring Configuration Files	188
	Backing Up Data Files	188
	Installing The FTP Server	189
	Restoring Data Files	189
10.3	Managing Mail So That It Can Be Used Without Worry	190
	Mail Not Reaching Its Destination	190
	Not Receiving Mail From Someone Outside Your LAN	190
	Mail Addressed To Special Accounts	191
	Mail From Other Administrators Or Users	191
10.4	Dealing With Problems	192
	When You Cannot Connect To The Network	192
	Verifying That The Network Is Connected	193
	Pinging The Internet Side	193
	Pinging The LAN Side	193
	If The ping Results Are Odd	194
	Restarting Daemons	194
Appendix A	How To Configure A Windows Client PC	197
Appendix B	How To Configure A Macintosh Client	201
Appendix C	How To Configure The Mail Client	203
Appendix D	How To Create A Secondary DNS Server	205
Appendix E	New Features Of Red Hat Linux Version 6.1	209
Appendix F	Linux Resources Online: Web Sites, Mailing Lists, News Groups	211
Appendix G	Linux Distributions	217
Appendix H	Dedicated Internet Connectivity Options	219
Appendix I	Command Reference	223
Appendix J	GNU General Public License	229
	Glossary	237
	Index	247