linux培训日志8--bind,mail

                         BIND & eMAIL (2006-12-9)

 

一.BIND(Berkeley Internet Name Domain)

   rpm -ivh bind

   /etc/named.conf

   /var/named/xxx.zone   (or   /var/named/chroot/var/named/xxx.zone)

   /etc/sysconfig/named  (chroot)

 

   e.g.1
The following example shows a very basic zone file.

$ORIGIN example.com.
$TTL 86400
@     IN     SOA    dns1.example.com.     hostmaster.example.com. (
                    2001062501 ; serial
                    21600      ; refresh after 6 hours
                    3600       ; retry after 1 hour
                    604800     ; expire after 1 week
                    86400 )    ; minimum TTL of 1 day

      IN     NS     dns1.example.com.
      IN     NS     dns2.example.com.

      IN     MX     10     mail.example.com.
      IN     MX     20     mail2.example.com.

             IN     A       10.0.1.5

server1      IN     A       10.0.1.5
server2      IN     A       10.0.1.7
dns1         IN     A       10.0.1.2
dns2         IN     A       10.0.1.3

ftp          IN     CNAME   server1
mail         IN     CNAME   server1
mail2        IN     CNAME   server2
www          IN     CNAME   server2

    e.g.2

 

Reverse Name Resolution Zone Files

In the follow example, IP addresses 10.0.1.20 through 10.0.1.25 are pointed to corresponding FQDNs.

$ORIGIN 1.0.10.in-addr.arpa.
$TTL 86400
@     IN     SOA    dns1.example.com.     hostmaster.example.com. (
                    2001062501 ; serial
                    21600      ; refresh after 6 hours
                    3600       ; retry after 1 hour
                    604800     ; expire after 1 week
                    86400 )    ; minimum TTL of 1 day

      IN     NS     dns1.example.com.
      IN     NS     dns2.example.com.

20    IN     PTR    alice.example.com.
21    IN     PTR    betty.example.com.
22    IN     PTR    charlie.example.com.
23    IN     PTR    doug.example.com.
24    IN     PTR    ernest.example.com.
25    IN     PTR    fanny.example.com.

 另:

 1. /var/named/chroot/var/named/ 目录的权限不对，注意枪检查一下
 2.allow-transfer 与 allow-query(这个应该也没什么关系，安全期间也可以看一下）

 

 

二.eMAIL

   MTA:

       --Mail Tranfer Agent

   MDA:

       --Mail Deliver Agent

   MUA:

       --Mail User Agent

 

                    MUA1--->MTA--->MDA--->MUAn

 

   SMTP:

        --25

        --command

           helo

           mail from

           rcpt to

           data

           quit

 

   POP3: (install the dovecot package,modified /etc/dovecot.conf

           protocol=imap pop3 imaps pop3s )

        --110

        --command

           user name

           pass passwd

           list

           rept

           dele

           quit

   IMAP:

        --143  

 

   /etc/mail/sendmail.cf

   /etc/mail/sendmail.mc  (dnl DAEMON_OPTIONS(....127.0.0.1...)

   /etc/mail/access

   /etc/mail/locao-host-names

   /etc/aliases           {root :student ---> newaliases/(sendmail -bi)}

  

  

   $ m4 /etc/mail/sendmail.mc > /etc/mail/sendmail.cf