BIND也叫做NAMED,是现今互联网上使用最为广泛的DNS 服务器程序。这篇文章将要讲述如何在 chroot 监牢中运行 BIND,这样它就无法访问文件系统中除“监牢”以外的其它部分。
例如,在这篇文章中,我会将BIND的运行根目录改为 /var/named/chroot/。当然,对于BIND来说,这个目录就是 /(根目录)。 “jail”(监牢,下同)是一个软件机制,其功能是使得某个程序无法访问规定区域之外的资源,同样也为了增强安全性(LCTT 译注:chroot “监牢”,所谓“监牢”就是指通过chroot机制来更改某个进程所能看到的根目录,即将某进程限制在指定目录中,保证该进程只能对该目录及其子目录的文件进行操作,从而保证整个服务器的安全)。Bind Chroot DNS 服务器的默认“监牢”为 /var/named/chroot。
你可以按照下列步骤,在CentOS 7.0 上部署 Bind Chroot DNS 服务器。
1、安装Bind Chroot DNS 服务器
[root@centos7 ~]# yum install bind-chroot bind -y
2、拷贝bind相关文件,准备bind chroot 环境
复制代码 代码如下:
[root@centos7 ~]# cp -R /usr/share/doc/bind-*/sample/var/namedsample/ for example named configuration files.
//
options {
listen-on port 53 { any; };
listen-on-v6 port 53 { ::1; };
directory "/var/named";
dump-file "/var/named/data/cache_dump.db";
statistics-file "/var/named/data/named_stats.txt";
memstatistics-file "/var/named/data/named_mem_stats.txt";
allow-query { any; };
recursion yes;
dnssec-enable yes;
dnssec-validation yes;
dnssec-lookaside auto;
bindkeys-file "/etc/named.iscdlv.key";
managed-keys-directory "/var/named/dynamic";
pid-file "/run/named/named.pid";
session-keyfile "/run/named/session.key";
};
logging {
channel default_debug {
file "data/named.run";
severity dynamic;
};
};
zone "." IN {
type hint;
file "named.ca";
};
zone "example.local" {
type master;
file "example.local.zone";
};
zone "0.168.192.in-addr.arpa" IN {
type master;
file "192.168.0.zone";
};
include "/etc/named.rfc1912.zones";
include "/etc/named.root.key";
7、 为 example.local 域名创建转发域与反向域文件
a)创建转发域
复制代码 代码如下:
[root@centos7 ~]# vi /var/named/chroot/var/named/example.local.zone
添加如下内容并保存:
; ; Addresses and other host information. ; $TTL 86400 @ IN SOA example.local. hostmaster.example.local. ( 2014101901 ; Serial 43200 ; Refresh 3600 ; Retry 3600000 ; Expire 2592000 ) ; Minimum ; Define the nameservers and the mail servers IN NS ns1.example.local. IN NS ns2.example.local. IN A 192.168.0.70 IN MX 10 mx.example.local. centos7 IN A 192.168.0.70 mx IN A 192.168.0.50 ns1IN A 192.168.0.70 ns2IN A 192.168.0.80
b)创建反向域
[root@centos7 ~]# vi /var/named/chroot/var/named/192.168.0.zone
; ; Addresses and other host information. ; $TTL 86400 @ IN SOA example.local. hostmaster.example.local. ( 2014101901 ; Serial 43200 ; Refresh 3600 ; Retry 3600000 ; Expire 2592000 ) ; Minimum 0.168.192.in-addr.arpa. IN NS centos7.example.local. 70.0.168.192.in-addr.arpa. IN PTR mx.example.local. 70.0.168.192.in-addr.arpa. IN PTR ns1.example.local. 80.0.168.192.in-addr.arpa. IN PTR ns2.example.local.。
8、开机自启动 bind-chroot 服务
[root@centos7 ~]# /usr/libexec/setup-named-chroot.sh /var/named/chroot on [root@centos7 ~]# systemctl stop named [root@centos7 ~]# systemctl disable named [root@centos7 ~]# systemctl start named-chroot [root@centos7 ~]# systemctl enable named-chroot ln -s '/usr/lib/systemd/system/named-chroot.service' '/etc/systemd/system/multi-user.target.wants/named-chroot.s
以上就是本文的全部内容,希望对大家的学习有所帮助,也希望大家多多支持考高分网。



