reverse dns entry for mail server

Windows Server 2003 building a mail serverBecause Windows Server 2003 defaults to not installing the POP3 and SMTP services we need to build our mail servers, we need to install them ourselves. Here's how:1. Place the Windows Server 2003 System CD

Each IP address can have a host name that consists of one or more strings separated by a decimal point. With the hostname, do not memorize each IP device IP address, just remember the relative intuitive meaningful host name on the line. This is the

DNS ServiceDNS: Domain Nsme ServiceRole: Resolving the domain name to IP (forward parsing) or resolving IP to a domain name (reverse parsing)Classification of DNS top-level domains:Organization domain:. com. net. org .....Country domain:. CN. tw. JP

I.  dns theory: DNS: Domain Name Service (domain  nsme  service) role: Resolving Domain names to IP (forward parsing) or resolve IP to domain name (reverse resolution) The classification of DNS top-level domains: Organization domain:.

ConceptDefault dns lookup sequence for linux clients: Local DNS Cache → local hosts file → preferred DNS server (recursive) Linux DNS Server Query sequence:The DNS cache of the preferred server → the domain in which the preferred server is

DNS server: Describes DNS service principles, installation, master-slave configuration, and dns master-slave configuration. DNS server: Describes DNS service principles, installation, and master-slave configuration. 1. Introduction to DNS 1. DNS DNS

There are many forms of attack on the mail server: There are attacks using buffer overflow vulnerabilities, denial of service attacks, directory collection attacks, and so on. Strengthening mail servers, using mail filtering tools, using managed

type of action of the bind system across the Internet , more than N servers, personal hosts, most of the sites, mail and other servers have used the domain name form of address. such as www.google.com,mail.163.com and so on. It is clear that this

1. view the Host IP address resolved by the DNS host name Host CommandPurposeResolve a host name to an Internet address or an Internet address to a host name.SyntaxHost [-n [-a] [-c Class] [-d] [-r] [-t Type] [-v] [-w] [-z] Hostname | Address

DNS (Domain Name System): Provides a mapping of domain-to-IP addresses on the InternetDomain name: Also known as hostname, FQDN (full qualified domain name fully qualified domainname)Basic information:The bind service is typically used in Linux to