can also update the (Web host) host information manually byvisiting
can also update the host information manually byvisiting your account information at DynDNS. Chooseyour host from the list of hosts that you manage, andits server will detect your address. If your addresshas changed, click the Modify Host button to updatethe information. Be sensitive to the fact that updating your IPaddress when it hasn t changed will invoke theire of the good people at DynDNS. CompareIP addresses and update your account only ifthe IP address has changed. Otherwise, yourservice will be interrupted for abusing yourprivileges. Technique 45 is all about creating a self-signedSSL certificate for your Apache Web site. Check it out! Keeping Your Apache ServerUp-to-Date the Easy WayIf you run an Apache server for any length of time, you ll probably find it needs a bit of tweaking. Youmay want to enable new features or add virtualhosts (whole new Web sites) to your servers. Youcan make those changes directly with a text editorand the Apache configuration file, but you can savetime by configuring your server with a good graphi- cal tool. Fedora Linux comes with a very friendly configura- tion tool that makes it easy to manage your Apacheserver: It s called the HTTP Configuration tool, andwe show you how to install and use it in this section. If you re using a distribution other than Fedora (say, Mandrake or SuSE), we recommend that youget familiar with Webmin s Apache configurationmodule it s not as friendly as Fedora s tool, butit s better than editing configuration files by hand. See Technique 17 for more information aboutWebmin. 2.Confirm the account registration to activate theaccount. 3.Add host information for your computer: Choose a host name and an extension. Ourpersonal favorite has to be is-a-geek.com. The DynDNS service automatically detectsand fills in the IP Address field. Select the Wildcard check box if you wantyour name to be accessible from bothwww.sitename.dyndns.comandsitename.dyndns.com. 4.Click the Add Host button, and you re done. If your Apache server is running and your firewall isallowing access through port 80, your Web siteshould be exposed to the Web. The exposure you get through the Web is alsoa liability. Build a good, sturdy firewall to pro- tect the rest of your system see Technique 34for more information about firewalls. Better yet, keep your site in a UML jail. VisitTechnique 58 for information about installingApache in a UML jail with ADIOS. Updating your IP addressDifferent ISPs have different policies about changingthe IP address of your local network. If you re con- nected to the Internet using a dial-up account, yourIP address changes each time you connect. Otherconnection types may assign you a semi-permanentIP address or change your address every few days. Ifyour ISP changes your IP address only when you logout, you need to update the dynamic DNS host infor- mation only when you ve logged out and back inagain. If your IP address changes more often, you llprobably want to use a client program to monitor thechanges and update the host information for you.
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