yum install -y bind bind-chroot bind-utils
chroot是通过相关文件封装在一个伪根目录内,已达到安全防护的目的,一旦程序被攻破,将只能访问伪根目录内的内容,而不是真实的根目录
BIND安装好之后不会有预制的配置文件,但是在BIND的文档文件夹内(/usr/share/doc/bind-9.9.4),BIND为我们提供了配置文件模板,我们可以直接拷贝过来:cp -r /usr/share/doc/bind-9.9.4/sample/etc/* /var/named/chroot/etc/cp -r /usr/share/doc/bind-9.9.4/sample/var/* /var/named/chroot/var/
配置BIND服务的主配置文件(/var/named/chroot/etc/named.conf),命令:vim /var/named/chroot/etc/named.conf;
内容很多使用简单配置,删除文件中logging以下的全部内容,以及option中的部分内容,得到如下配置vim /var/named/chroot/etc/named.confoptions { // Put files that named is allowed to write in the data/ directory: directory "/var/named"; // "Working" directory listen-on port 53 { any; }; listen-on-v6 port 53 { any; }; };
在主配置文件(/var/named/chroot/etc/named.conf )中加入,zone参数
vim /var/named/chroot/etc/named.conf options { // Put files that named is allowed to write in the data/ directory: directory "/var/named"; // "Working" directory listen-on port 53 { any; }; listen-on-v6 port 53 { any; }; };zone "yaohjk.com" { type master; file "yaohjk.com.zone";};
新建yaohjk.com.zone文件,yaohjk.com的域名解析文件,zone文件放在/var/named/chroot/var/named/下,zone文件可以已/var/named/chroot/var/named/named.localhost为模板。
命令:cp /var/named/chroot/var/named/named.localhost /var/named/chroot/var/named/yaohjk.com.zone
文件yaohjk.com.zone的内容如下:
[root@xxx]# cat yaohjk.com.zone $TTL 1D@ IN SOA @ rname.invalid. ( 0 ; serial 1D ; refresh 1H ; retry 1W ; expire 3H ) ; minimum NS @ A 127.0.0.1 AAAA ::1gz IN A 192.168.0.199boss IN A 192.168.0.199login IN A 192.168.0.199pay IN A 192.168.0.199wx IN A 192.168.0.199
禁用bind默认方式启动,改用bind-chroot方式启动。命令如下:
[root@xxx named]# /usr/libexec/setup-named-chroot.sh /var/named/chroot on[root@xxx named]# systemctl stop named[root@xxx named]# systemctl disable named[root@xxx named]# systemctl start named-chroot[root@xxx named]# systemctl enable named-chroot[root@xxx named]#[root@xxx named]# ps -ef|grep namednamed 25984 1 0 13:41 ? 00:00:00 /usr/sbin/named -u named -c /etc/named.conf -t /var/named/chrootroot 29267 48688 0 13:54 pts/1 00:00:00 grep --color=auto named[root@xxx named]#