Oracle and Java are registered trademarks of Oracle and/or its affiliates. Such information elements are represented as fields separated by white space. Additional Resources ", Collapse section "14.9. File System Changes in Apache HTTP Server 2.0, 10.2. Process Directories", Expand section "5.5. TCP Wrappers Configuration Files", Expand section "17.2.1. To have multi-line resource records opening and closing brackets can be used to ignore linebreaks. # convert raw zone file "example.net.raw", containing data for zone example.net, to text-format zone file "example.net.text" named-compilezone -f raw -F text -o example.net.text example . The sysconfig Directory", Expand section "4.1. Backup Domain Controller (BDC) using LDAP, 14.3.3.4. Each line of this file will contain one and only DNS record, it can't contain two records or more. The Default Postfix Installation, 11.3.3.1. DNS Configuration and Data Files. Global Environment Configuration", Expand section "10.2.2. NFS Client Configuration Files", Expand section "9.6. Windows NT4-based Domain Member Server, 14.3.3.1. This eliminates the chore of manually configuring zone transfers between. Additional Resources ", Expand section "22. Additional Resources", Collapse section "17.5. Main Server Configuration", Collapse section "10.2.2. Common Sendmail Configuration Changes, 11.3.2.1. OpenLDAP Daemons and Utilities", Collapse section "13.3. Where we list some real zone files. Define a new domain. Domain . Secure Read/Write File and Print Server, 14.3.2.1. A quick look at zone file in BIND9. PAM and Administrative Credential Caching", Expand section "16.7. Stand-alone Server", Collapse section "14.3.1. Delivering vs. Non-Delivering Recipes, 11.5.1.2. SELinux Configuration Files", Collapse section "21.2.2. named-checkzone command syntax. Some name servers, including BIND, also require at least one additional NS record. Additional Resources", Collapse section "4.3. Top-level Files within the proc File System", Expand section "5.3. We and our partners share information on your use of this website to help improve your experience. User Private Groups", Expand section "6.6. The BIND zone file is a file format that has been widely adopted by DNS server software. Server Security Mode (User-Level Security), 14.5. File System Structure", Expand section "3.2. TCP Wrappers and xinetd", Expand section "17.2. Documentation For First-Time Linux Users, 1.2.2.1. Formatting Access Rules", Expand section "17.4. xinetd Configuration Files", Collapse section "17.4. xinetd Configuration Files", Expand section "17.4.3. Additional Resources", Collapse section "19.1. Additional Resources", Expand section "14.1. Advanced Features of BIND", Collapse section "12.5. This format was originally used by the Berkeley Internet Name Domain (BIND) software package, but has been widely adopted by other DNS server software - though some of them (e.g. The format is defined in RFC 1035. Zone (example.com) () directory /etc/named file examp. So long as you are internally consistent, you can name the zone data files anything you want. Daemon Overview", Expand section "14.3. You need to use named- checkzone command as zone file validity checking tool. Special File Locations Under Red Hat Enterprise Linux, 4.1. This is always enabled for the named-compilezone command. Samba Daemons and Related Services", Collapse section "14.2. About Us Contact Page | Privacy Policy | Terms and Conditions. The format of a zone file is defined in RFC1035 (section 5) and RFC1034 (section 3.6.1). if(typeof ez_ad_units!='undefined'){ez_ad_units.push([[300,250],'networkencyclopedia_com-large-billboard-2','ezslot_7',121,'0','0'])};__ez_fad_position('div-gpt-ad-networkencyclopedia_com-large-billboard-2-0');report this adComputer networking concepts, technologies, and services. Event Sequence of an SSH Connection", Collapse section "20.3. Using rndc Expand section "12.4. Any line may end with comment text preceded by a semicolon, and the file may also contain any number of blank lines. Create Reverse Zone File. Boot Process, Init, and Shutdown", Collapse section "1. Additional Resources", Expand section "18.3. General Parameters and Modules", Expand section "22.5. Additional Resources", Collapse section "18.7. User Private Groups", Collapse section "6.4. Additional Resources", Collapse section "9.6. Additional Resources", Expand section "17. Domain Controller", Expand section "14.4. Additional Resources ", Expand section "15.1. Other Global Environment Changes, 10.2.4. Advanced Features of BIND", Expand section "12.7. Above, we have a small but complete example of a typical zone filein fact, it's an anonymized version of a production zone file on a domain I manage. It contains the name of the zone, the e-mail address of the party responsible for administering the domain's zone file, the current serial number of the zone, the primary . Configure DNS Server (named.conf) Add zone records. Primary Domain Controller (PDC) using LDAP, 14.3.3.3. Configuration Directives for SSL", Expand section "10.9. Such zone files prevent a DNS server from referring to other, possibly external DNS servers. Create Forward Zone File. Pluggable Authentication Modules (PAM), 16.6. Configuration Directives for SSL", Collapse section "10.5.66. Dynamic Shared Object (DSO) Support, 10.2.1.4. There's not much more to it than that. PAM and Device Ownership", Collapse section "16.7. Mail Access Protocols", Collapse section "11.1.2. Engage with our Red Hat Product Security team, access security updates, and ensure your environments are not exposed to any known security vulnerabilities. File System Structure", Collapse section "3. Informational or Debugging Options, 11.4.2.1. Mail Access Protocols", Expand section "11.2. MPM Specific Server-Pool Directives", Collapse section "10.5.9. Verify the bind chroot configuration. Network Services Reference", Collapse section "II. NSD, PowerDNS) are using the zone files only as a starting point to compile them into database format, see also . NOTE: In the example zone file above, no record classes (IN, CH, HS) are displayed. zone "serverlab.intra" IN { type master; file "serverlab.intra.db"; allow-query { any; }; }; Defines the role of this server for the zone. Reverse DNS lookups for IPv4 use a reversed IP address (to work within the hierarchical structure of DNS) in the zone in-addr.arpa. TCP Wrappers Configuration Files", Collapse section "17.2. Editing Zone Files. Introduction to DNS", Collapse section "12.1. Note that a reverse name resolution zone requires the first three blocks of the IP address reversed followed by .in-addr.arpa.This allows the single block of IP numbers used in the reverse name resolution zone file to be associated with the zone. ins.style.display='block';ins.style.minWidth=container.attributes.ezaw.value+'px';ins.style.width='100%';ins.style.height=container.attributes.ezah.value+'px';container.appendChild(ins);(adsbygoogle=window.adsbygoogle||[]).push({});window.ezoSTPixelAdd(slotId,'stat_source_id',44);window.ezoSTPixelAdd(slotId,'adsensetype',1);var lo=new MutationObserver(window.ezaslEvent);lo.observe(document.getElementById(slotId+'-asloaded'),{attributes:true});Zone File is a file on a name server that contains information that defines the zone that the name server manages. SysV Init Runlevels", Collapse section "1.4. Directories within /proc/", Collapse section "5.3. Additional Resources", Expand section "21.2. The GRUB Boot Loader", Expand section "2.7. Step-by-Step Tutorial: Configure DNS Server using bind chroot (CentOS/RHEL 7/8) by admin. Ethernet Parameters", Expand section "22.5.2. Below is an example of a zone file (source Wikipedia): In order for the data in the zone file to be correctly processed, specific guidelines must be observed, else DNS cannot function properly (or the client will . Introduction to Samba", Expand section "14.2. Features of Apache HTTP Server 2.0, 10.1.2. When manually specified otherwise, the check levels must at least be as strict as . Berkeley Internet Name Domain (BIND)", Expand section "12.1. It contains the name of the zone, the e-mail address of the party responsible for administering the domains zone file, the current serial number of the zone, the primary nameserver of the zone, and various timing elements (measured in seconds). GRUB Menu Configuration File", Expand section "2.9. A Red Hat training course is available for Red Hat Enterprise Linux. It may be omitted, in which case the resulting value will be set from the preceding record. Search and browse thousands of terms and acronyms related to computer networks. The secondary name server undertakes changes from the primary name server every 24 hours (TTL = 86,400 seconds; Time To Live). PAM Configuration File Format", Expand section "16.3.1. A Domain Name System (DNS) zone file is a text file that describes a DNS zone. Procmail Recipes", Collapse section "11.4.2. Mail Transport Protocols", Expand section "11.1.2. Additional Resources", Collapse section "8.5. These records identify which name server is responsible for a given zone, timing parameters forzone transfersbetween name servers, IP address to hostname mappings for hosts within the domains over which the zone file is authoritative, and so on. This allows you to be aware of those threats. More Than a Secure Shell", Expand section "20.7. A Detailed Look at the Boot Process", Collapse section "1.2.2. Entries may occur in any order in a zone file, with some exceptions. Finding Appropriate Documentation", Expand section "2.1. Additional Resources", Collapse section "12.7. A real domain example. Formatting Access Rules", Collapse section "17.2.1. Apache HTTP Server", Expand section "10.1. Samba Network Browsing ", Expand section "14.7. SELinux Configuration Files", Expand section "21.3. Additional Match Option Modules, 18.5.1. iptables Control Scripts Configuration File, 20.3. Desktop Environments and Window Managers", Collapse section "7.2. Active Directory Security Mode (User-Level Security), 14.4.5. It contains the name of the zone, the e-mail address of the party responsible for administering the domain's zone file, the current serial number of the zone, the primary . . Email Program Classifications", Collapse section "11.2. Binding and Redirection Options, 18.2. The Channel Bonding Module", Expand section "22.6. Altering xinetd Configuration Files", Collapse section "17.4.3. Options Used within iptables Commands, 18.3.4.4. PAM Configuration File Format", Collapse section "16.3. The parameters of the SOA record also specify a list of timing and expiration parameters (serial number, slave refresh period, slave retry time, slave expiration time, and the maximum time to cache the record). Interface Configuration Files", Collapse section "8.2. Starting and Stopping vsftpd", Collapse section "15.4. Configuring a System to Authenticate Using OpenLDAP", Collapse section "13.7. link to Common Security Threats in Computer Networks, It provides a more efficient mechanism for zone transfers through the domain replication process of Active Directory. Finally, if a name at the start of a record is missed, the name from the previous entry gets used (This is why all three A records are equivalent). PHP4, LDAP, and the Apache HTTP Server, 13.5. The sysconfig Directory", Collapse section "4. FTP and Web services, available at the standard, Expand section "2. Documentation For First-Time Linux Users", Collapse section "2.1. Zone files contain the IP and name data, MX records and other service records. A zone file is referenced by the configuration file of the name server software. It is useful for checking zone files before configuring them into a name server. 7. Samba Account Information Databases ", Collapse section "14.5. Additional Resources", Expand section "II. The mod_auth_dbm and mod_auth_db Modules, 10.5. A DNS zone is a subset, often a single domain, of the hierarchical domain name structure of the DNS. The File Transport Protocol", Collapse section "15.1. MPM Specific Server-Pool Directives, 10.5.9.4. The /etc/named.conf file establishes the server as a master, slave, or cache-only name server. As outlined in Section 17.1.1, "Nameserver Zones", zone files contain information about a namespace. Keep your systems secure with Red Hat's specialized responses to security vulnerabilities. In our example, we'll be creating a domain called serverlab.intra. Additional Resources", Collapse section "13.9. All rights reserved. This is typically used for the apex of a zone. Additional Resources", Collapse section "16.8. Directories within /proc/", Expand section "5.3.1. The record class field indicates the namespace of the record information. Files in the /etc/sysconfig/ Directory", Expand section "4.3. Web 3.0 is the next generation of Internet technology that heavily relies on machine learning, artificial intelligence (AI), and blockchain technology. For example, an address record only requires an address, while a mail exchanger record requires a priority and a domain name. . Files Related to SELinux", Expand section "21.2.2. Overview of File System Hierarchy Standard (FHS)", Collapse section "3.2. Using rndc" 12.4.1. . The Channel Bonding Module", Collapse section "22.5.2. named-checkzone {zonename} {filename} Where, zonename : The domain name of the zone being checked. Desktop Environments and Window Managers", Expand section "7.3. They are stored in the named working directory located in /var/named/ by default, and each zone file is named according to the file option in . An example of a zone file for the domain example.com is the following: At minimum, the zone file must specify the Start of Authority (SOA) record with the name of the authoritative master name server for the zone and the email address of someone responsible for management of the name server (represented as a domain name, with a full stop character in place of the usual @ symbol). BIND 8.1 added a new configuration file, /etc/named.conf, that replaces the /etc/named.boot file. Migrating Old Authentication Information to LDAP Format, 13.8. Note that all records must Fully Qualified Domain Names (FQDNs) which adds a . NFS Server Configuration", Expand section "9.3.2. Core X Font System", Expand section "7.6. Dyns DNS software only works with Internet (IN) class records and omits this information for efficiency purposes. In this file, the DNS records of our domain are stored. The BIND zone file is a file format that has been widely adopted by DNS server software. This is in contrast to relative domain names, where the origin gets appended (so in the example below, www gets expanded to www.example.com.). Samba Distribution Programs ", Expand section "14.9. This format was originally used by the Berkeley Internet Name Domain (BIND) software package, but has been widely adopted by other DNS server software though some of them (e.g. A zone file is a text-based file stored in a DNS server. Samba Security Modes ", Expand section "14.5. This an example of a zone file downloaded from Dyn's DNS system. Overview of File System Hierarchy Standard (FHS)", Collapse section "3.2.1. They also contain glue data that connects them to the other DNS servers. If so, the record inherits the field from the previous record. A free standing @ is used to denote the current origin. The X Window System", Expand section "7.2. For example, BIND typically uses a statement such as: The zone files for the DNS root zone and for the set of top-level domains contain resource records only for the authoritative domain name servers for each domain name. Starting Multiple Copies of vsftpd, 15.5.2. X Server Configuration Files", Collapse section "7.3. The exportfs Command", Collapse section "9.3.2. A zone file is a text file that describes a DNS zone. Modules and Apache HTTP Server 2.0, 10.2.4.5. Email Program Classifications", Expand section "11.3. The /etc/sysconfig/selinux Configuration File. Migrating Apache HTTP Server 1.3 Configuration Files", Expand section "10.2.1. to the domain name. $ORIGIN indicates a DNS node tree and will typically start a DNS zone file. Additional Resources", Expand section "6.4. Additional Resources", Expand section "3. . Samba Server Types and the smb.conf File ", Expand section "14.3.1. to the domain name. Additional Resources", Collapse section "20.7. if its a sub-domain it will be slave.sub-domain.example.com etc. Pluggable Authentication Modules (PAM)", Expand section "16.2. -i mode: Performs post load zone integrity checks. The BIND file format is the industry preferred zone file format and has been widely adopted by DNS server software. Additional Resources", Expand section "11.1.1. NFS and portmap", Expand section "9.3. The Secure Web Server Virtual Host, 11.3.1.2. The reverse mapping file name uses the subnet number and .rev, that is, if the zone is '23.168. . Samba Network Browsing ", Collapse section "14.6. Securing Communication", Collapse section "11.5.1. Migrating Directories from Earlier Releases, 14.3. Samba Security Modes ", Collapse section "14.4. Main Server Configuration", Expand section "10.2.4. Procmail Recipes", Collapse section "11.5. NSD, PowerDNS) are using the zone files only as a starting point to compile them into database format, see also Microsoft DNS with Active Directory-database integration. We recommend using the nsd-checkzone tool to verify that you have a working zone. Top-level Files within the proc File System, 7.2. Lightweight Directory Access Protocol (LDAP), 13.3.2. The file usually contains A record, MX record, domain name, mail servers, nameservers details and so on. Additional Resources", Collapse section "6.6. Increase visibility into IT operations to detect and resolve technical issues before they impact your business. Securing Communication", Expand section "11.6. Any host labels below the origin will append the origin hostname to assemble a fully qualified hostname. In this example the FQDN is: example.com..This is in contrast to relative domain names, where the origin gets appended (so in the example below, www gets expanded to www . Similarly, use the DNS console in Windows 2000 to administer the zone files instead of editing them directly. In this example, our server is a secondary server for company.com, the primary server is located at 196.144.12.100, and the zone file is named /var/named/company.zone. Additional Resources", Expand section "12. var cid='7402647023';var pid='ca-pub-3322332537501269';var slotId='div-gpt-ad-networkencyclopedia_com-medrectangle-3-0';var ffid=2;var alS=2021%1000;var container=document.getElementById(slotId);container.style.width='100%';var ins=document.createElement('ins');ins.id=slotId+'-asloaded';ins.className='adsbygoogle ezasloaded';ins.dataset.adClient=pid;ins.dataset.adChannel=cid;if(ffid==2){ins.dataset.fullWidthResponsive='true';} Mail Delivery Agents", Collapse section "11.4. The record data field may consist of one or more information elements, depending on the requirements of each record type. Dumps zone file in canonical format. Active Directory Domain Member Server, 14.3.2.2. A Domain Name System (DNS) zone file is a text file that describes a DNS zone. Example Zone File. A zone needs a SOA (Source Of Authority) record. /etc/sysconfig/system-config-users, 4.2. if(typeof ez_ad_units!='undefined'){ez_ad_units.push([[300,250],'networkencyclopedia_com-medrectangle-4','ezslot_3',114,'0','0'])};__ez_fad_position('div-gpt-ad-networkencyclopedia_com-medrectangle-4-0');A typical zone file might look something like this: On Microsoft Windows NTbased and Windows 2000based servers running theDNS Server services(and hence configured to operate as name servers for the network), the names of the zone files are similar to the names of the domains over which they have authority, but they have the .dns extension appended to them. Zone files contain information about a namespace and are stored in the named working directory (/var/named/) by default.Each zone file is named according to the file option data in the zone statement, usually in a way that relates to the domain in question and identifies the file as containing zone data, such as example.com.zone. Example A Dyn Zone File. Finding Appropriate Documentation", Collapse section "2. Revision 1260e134. A zone file is referenced by the dns configuration named.conf or any other conf files included in named.conf.For example, assume the zone file is located at /var/named/db.example.com, the dns conf file need to have this The mode parameter can be one of the following values: full Checks if MX records, SRV records, and delegation NS records refer to A or AAAA record (both in-zone and out-of-zone host names). Module Interface", Collapse section "16.3.1. You use rndc to tell the server to pick up the new zone, or you stop and restart your server. You declare the zone in your named.conf. GRUB Menu Configuration File", Collapse section "2.7. Documentation For First-Time Linux Users", Expand section "1. filename : The name of the zone file. In the zone file, domain names that end with a full stop character (such as "example.com." Boot Loaders for Other Architectures, 1.3. NFS Server Configuration", Collapse section "9.3. Common Security Threats in Computer Networks. The named.conf File. Some server software automatically configures resource records for specially recognized domains or hostnames, such as localhost, but a customized zone master file may be used. Additional Resources", Expand section "13. Additional Resources", Collapse section "19.7. Common Statement Types", Collapse section "12.2.1. However, when placed together in a single file, they become easier to understand. OpenLDAP Setup Overview", Expand section "13.7. Event Sequence of an SSH Connection", Expand section "20.5. For example, the zone file for the domain microsoft.com would be microsoft.com . Mail User Agents", Expand section "11.5.1. Securing Email Client Communications, 12.3.4. Fetchmail Configuration Options, 11.3.3.6. Configuration Directives in httpd.conf", Collapse section "10.5. Additional Resources", Collapse section "5. Using rndc" Collapse section "12.4. The /etc/openldap/schema/ Directory, 13.7. Additional Resources", Expand section "9. A zone file is a sequence of line-oriented entries, each of which is either a directive or a text description that defines a single resource record (RR). The zone file was last changed on 27 April 2020; this was the second change made on that day. Now that the zone file is setup and resolving names to IP Adresses a Reverse zone is also required. General Parameters and Modules", Collapse section "22. A zone file may be either a DNS master file, authoritatively describing a zone, or it may be used to list the contents of a DNS cache.[1]. Zone files are stored in the "named" working directory (/var/named/) by default, and can be exported from your DNS provider. A Reverse zone allows DNS to convert from an address to a name. The proc File System", Expand section "5.1. Ethernet Parameters", Collapse section "22.5. The /etc/exports Configuration File, 10.1.1. A Virtual File System", Collapse section "5.1. NFS Client Configuration Files", Collapse section "9.4. For example, the zone file for the domain microsoft.com would be microsoft.com.dns and would be located in the directory \%SystemRoot%\System32\Dns.if(typeof ez_ad_units!='undefined'){ez_ad_units.push([[300,250],'networkencyclopedia_com-banner-1','ezslot_5',126,'0','0'])};__ez_fad_position('div-gpt-ad-networkencyclopedia_com-banner-1-0'); A typical DNS server has at least three zone files:if(typeof ez_ad_units!='undefined'){ez_ad_units.push([[300,250],'networkencyclopedia_com-large-leaderboard-2','ezslot_0',127,'0','0'])};__ez_fad_position('div-gpt-ad-networkencyclopedia_com-large-leaderboard-2-0'); Windows 2000 gives you the option of integrating DNS withActive Directory. In the event of an error, the secondary name server attempts synchronization again after 3 hours (3600 seconds). To put it simply, the DNS zone file is where the data of the DNS Zone is the file, so we can say that the DNS zone and the DNS zone file is one and the same. In this example the FQDN is: example.com.. Samba Daemons and Related Services", Collapse section "14.2.1. The following example shows a very basic zone file. The format of a zone file is defined in RFC 1035 (section 5) and RFC 1034 (section 3.6.1). Altering xinetd Configuration Files, 17.4.3.3. The most commonly used namespace is that of the Internet, indicated by parameter IN, but others exist and are in use, e.g., CHAOS. Additional Resources", Collapse section "11.6. The arguments of the secondary directive are the origin of the zone, the IP address of the zone's primary server, and the file name where the zone file is to be stored. Domain Member Server", Expand section "14.3.3. Options Used within iptables Commands", Collapse section "18.3. Additionally, it applies stricter check levels by default, since the dump output will be used as an actual zone file loaded by named. Domain Security Mode (User-Level Security), 14.4.4. TCP Wrappers and xinetd", Collapse section "17. Network Services Reference", Expand section "8.2. Configuration Directives in httpd.conf", Expand section "10.5.9. will be appended to them. MinSpareServers and MaxSpareServers, 10.5.9.5. $GENERATE, a non-standard extension accepted by BIND and some other, This page was last edited on 29 November 2022, at 03:03. An entry is composed of fields separated by any combination of white space (tabs and spaces), and ends at a line boundary except inside a quoted string field value or a pair of enclosing formatting parentheses. Network File System (NFS)", Collapse section "9. A Domain Name System (DNS) zone file is a text file that describes a DNS zone. Options Used within iptables Commands", Expand section "18.3.4. iptables Match Options", Collapse section "18.3.4. iptables Match Options", Expand section "18.5. iptables Control Scripts", Collapse section "18.5. iptables Control Scripts", Expand section "18.7. Samba Account Information Databases, 14.6.3. Boot Loaders and System Architecture, 3.2. Samba Server Types and the smb.conf File, 14.3.1.4. Top-level Files within the proc File System", Collapse section "5.2. Boot Process, Init, and Shutdown", Expand section "1.2. Core X Font System", Collapse section "7.4.2. Mail Transport Agents", Expand section "11.4. Network File System (NFS)", Collapse section "9.1.2. Samba with CUPS Printing Support ", Collapse section "14.7. Manual Conversion: The named-compilezone utility, which is part of the BIND distribution, can be used to convert zones from text to raw and from raw to text. A zone file is a collection of resource records with each record entry described in the following sequence: Copyright 2022, Oracle and/or its affiliates. FHS Organization", Expand section "4. Origin and TTL. Lightweight Directory Access Protocol (LDAP)", Collapse section "13. Apache HTTP Server 2.0", Expand section "10.2. A zone file is a text file that describes a DNS zone. A Virtual File System", Expand section "5.2. Additional Resources", Collapse section "10. named-compilezone is similar to named-checkzone, but it always dumps the zone contents to a specified file in a specified format. Directories in the /etc/sysconfig/ Directory, 5.2. Start named-chroot service. Example: With $ORIGIN example.com., any record where the host label field is not followed by a period, example.com. Other names may be trademarks of their respective owners. A zone needs a SOA (Source Of Authority) record. For the exact structure we refer you to the wiki page.Note that all records must Fully Qualified Domain Names (FQDNs) which adds a . Reverse Zone File. On this page we give an example of a basic zone file and its contents. Example Zone File 12.3.4. The first field of a directive consists of a dollar sign followed by a keyword: A resource record entry consists of several fields as follows (both field orderings are acceptable and may be used interchangeably): The name field may be left blank. Files in the /etc/sysconfig/ Directory, 4.1.35. The exportfs Command", Expand section "9.4. Module Interface", Expand section "16.6. For the exact structure we refer you to the wiki page. Running Additional Programs at Boot Time, 2.1. X Server Configuration Files", Expand section "7.4.2. $INCLUDE is followed by a file name and optional origin domain name to be used when interpreting its contents (which are treated as if they appeared in the parent file, followed by a reset to the origin value preceding evaluation of the directive). It may be omitted, in which case the resulting value will be set from the default TTL (if defined) or from the preceding record. Files Related to SELinux", Collapse section "21.2. A zone file is a text based file with a format defined in RFC 1035 and 1034 and is stored on a DNS server (name server). The format is defined in RFC 1035. Domain Member Server", Collapse section "14.3.2. File format. OpenLDAP Daemons and Utilities", Expand section "13.6. Additional Resources", Collapse section "III. Introduction to DNS", Expand section "12.2.1. MPM Specific Server-Pool Directives", Expand section "10.5.66. It also specifies the zones over which the server has authority and which data files it should read to get its initial data. Additional Resources", Expand section "20.3. Mail Delivery Agents", Expand section "11.4.2. SysV Init Runlevels", Collapse section "2. Directives are control entries that affect the rest of the zone file. Open the Bind configuration file into a text editor. Copyright 20012022, NLnet Labs. Primary Domain Controller (PDC) with Active Directory, 14.4.3. The BIND file format is the industry preferred zone file format and has been widely adopted by DNS server software. SOA Record The $ORIGIN is followed by the zones Start Of Authority (SOA) record. Migrating Apache HTTP Server 1.3 Configuration Files, 10.2.1.3. These files were current 24th of September 1996, and were then edited to fit BIND 8 restrictions and use extensions . $ORIGIN is followed by a domain name to be used as the origin for subsequent relative domain names. Configuring a System to Authenticate Using OpenLDAP", Expand section "13.9. Samba Distribution Programs ", Collapse section "14.8. introducing citations to additional sources, https://en.wikipedia.org/w/index.php?title=Zone_file&oldid=1124514820, Short description is different from Wikidata, Articles needing additional references from November 2020, All articles needing additional references, Creative Commons Attribution-ShareAlike License 3.0. This file contains the mapping between the domain name and IP address. Differences between iptables and ipchains, 18.3. Additional Resources", Collapse section "5.5. Common Statement Types", Expand section "12.5. Modules and Apache HTTP Server 2.0", Expand section "10.5. Interface Configuration Files", Expand section "8.5. Also note that @ symbol in the zone file refers to the $ORIGIN parameter. PAM Configuration Files", Expand section "16.3. Mail Transport Agents", Collapse section "11.3. Requiring SSH for Remote Connections, 21.2.2.1. Stand-alone Server", Expand section "14.3.2. Some name servers, including BIND, allow nonstandard representations that use time unit abbreviations (for example, "2d" meaning two 24-hour days or "1h30m" meaning one hour and 30 minutes). 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