A_01_centos7-DNS服务bind搭建

「爱情、让人受尽委屈。」 2021-11-22 15:16 344阅读 0赞

ipconfig /flushdns  
nslookup [rancher.51ctf.cn][]

yum install -y bind-libs bind-utils bind  
systemctl restart named;systemctl status named

cat /etc/named.conf

//
    // named.conf
    //
    // Provided by Red Hat bind package to configure the ISC BIND named(8) DNS
    // server as a caching only nameserver (as a localhost DNS resolver only).
    //
    // See /usr/share/doc/bind*/sample/ for example named configuration files.
    //
    // See the BIND Administrator's Reference Manual (ARM) for details about the
    // configuration located in /usr/share/doc/bind-{version}/Bv9ARM.html
    
    options {
    	listen-on port 53 { 10.138.20.189; };
    	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";
    	recursing-file  "/var/named/data/named.recursing";
    	secroots-file   "/var/named/data/named.secroots";
    	allow-query     { any; };
    
    	/* 
    	 - If you are building an AUTHORITATIVE DNS server, do NOT enable recursion.
    	 - If you are building a RECURSIVE (caching) DNS server, you need to enable 
    	   recursion. 
    	 - If your recursive DNS server has a public IP address, you MUST enable access 
    	   control to limit queries to your legitimate users. Failing to do so will
    	   cause your server to become part of large scale DNS amplification 
    	   attacks. Implementing BCP38 within your network would greatly
    	   reduce such attack surface 
    	*/
    	recursion yes;
    
    	dnssec-enable yes;
    	dnssec-validation yes;
    
    	/* Path to ISC DLV key */
    	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;
            };
    };
    
    view localhost {
           	match-clients { 10.138.20.0/24; };
    	zone "." IN {
    		type hint;
    		file "named.ca";
    	};
    	include "/etc/named.rfc1912.zones";
    };
    view internet {
            /*match-clients { 10.138.40.0/24; };*/
            match-clients { any; };
            zone "." IN {
                    type hint;
                    file "named.ca";
            };
            include "/etc/named.rfc1912.inter";
    };
    
    
    //include "/etc/named.rfc1912.zones";
    include "/etc/named.root.key";

cat /etc/named.rfc1912.zones

zone "51ctf.cn" IN {
            type master;
            file "51ctf.cn.zone";
            allow-update { none; };
    };
    
    zone "20.138.10.in-addr.arpa" IN {
            type master;
            file "51ctf.cn.local";
            allow-update { none; };
    };

cat /etc/named.rfc1912.inter

zone "51ctf.cn" IN {
            type master;
            file "51ctf.cn.inter";
            allow-update { none; };
    };
    
    
    zone "20.138.10.in-addr.arpa" IN {
            type master;
            file "51ctf.cn.local";
            allow-update { none; };
    };

cat /var/named/51ctf.cn.zone

$TTL 1D
    @       IN SOA  @ root.51ctf.cn.  (
                                            123
                                            1D
                                            1H
                                            1W
                                            3H )
            NS      ns.51ctf.cn.
    ns      A       10.138.20.189
    rancher A       123.58.180.7
    gitlab  A       123.58.180.8

cat /var/named/51ctf.cn.local

$TTL 1D
    @       IN SOA  @ root.51ctf.cn. (
                                            0       ; serial
                                            1D      ; refresh
                                            1H      ; retry
                                            1W      ; expire
                                            3H )    ; minimum
            IN NS ns.51ctf.cn.
    189     PTR     ns.51ctf.cn.
    188     PTR     nessus.51ctf.cn.

cat /var/named/51ctf.cn.inter

### 常见故障 ###

Jul 24 16:34:44 test-189 bash: dns_rdata_fromtext: 51ctf.cn.zone:3: near '1D': not a valid number
    Jul 24 16:34:44 test-189 bash: zone 51ctf.cn/IN: loading from master file 51ctf.cn.zone failed: not a valid number
    Jul 24 16:34:44 test-189 bash: zone 51ctf.cn/IN: not loaded due to errors.
    Jul 24 16:34:44 test-189 bash: _default/51ctf.cn/IN: not a valid number

原因为/var/named/下的配置文件  
@ IN SOA @ [root.51ctf.cn][].  
SOA 后面要加@ 或主域名

Jul 24 17:00:48 test-189 bash: zone 20.138.10.in-addr.arpa/IN: loading from master file 51ctf.cn.local failed: bad dotted quad
    Jul 24 17:00:48 test-189 bash: zone 20.138.10.in-addr.arpa/IN: not loaded due to errors.
    Jul 24 17:00:48 test-189 bash: _default/20.138.10.in-addr.arpa/IN: bad dotted quad
    Jul 24 17:00:48 test-189 systemd: named.service: control process exited, code=exited status=1
    Jul 24 17:00:48 test-189 systemd: Failed to start Berkeley Internet Name Domain (DNS).
    Jul 24 17:00:48 test-189 systemd: Unit named.service entered failed state.
    Jul 24 17:00:48 test-189 systemd: named.service failed.

原因为 /etc/name.conf 引用视图view 所有的zone都应该包含里去 原配置文件的include 删除或/*注释掉*/

[rancher.51ctf.cn]: http://rancher.51ctf.cn
[root.51ctf.cn]: http://root.51ctf.cn