加密算法与DNS服务搭建

时间：2018-11-16 17:35:18 阅读：229 评论：0 收藏：0 [点我收藏+]

标签：hal 软件签证 section day ttl 客户端 blog ffffff

1、简述常见加密算法及常见加密算法原理，最好使用图例解说

常见加密算法：

对称加密：加密和解密使用同一个密钥；

DES：Data Encryption Standard;
3DES：Triple DES;
AES：Advanced Encryption Standard; (128bits, 192bits, 256bits, 384bits)
Blowfish
Twofish
DEA
RC6
CAST5

特性：
1、加密、解密使用同一个密钥；
2、将原始数据分割成为固定大小的块，逐个进行加密；

缺陷：
1、密钥过多；
2、密钥分发困难；

公钥加密：密钥分为公钥与私钥

公钥：从私钥中提取产生；可公开给所有人；pubkey
私钥：通过工具创建，使用者自己留存，必须保证其私密性；secret key；
特点：用公钥加密的数据，只能使用与之配对儿的私钥解密；反之亦然；

用途：
数字签名：主要在于让接收方确认发送方的身份；
密钥交换：发送方用对方公钥加密一个对称密钥，并发送给对方；
数据加密

算法：RSA， DSA， ELGamal
DSS: Digital Signature Standard
DSA：Digital Signature Algorithm

单向加密：即提出数据指纹；只能加密，不能解密；
特性：定长输出、雪崩效应；
功能：完整性；
算法：
md5：Message Digest 5, 128bits
sha1：Secure Hash Algorithm 1, 160bits
sha224, sha256, sha384, sha512

密钥交换： IKE（Internet Key Exchange）
公钥加密
DH（Deffie-Hellman）
A：p, g
B：p, g

            A: x
                --> p^x%g ==> B

                A: (p^y%g)^x=p^yx%g

            B: y
                --> p^y%g ==> A

                B: (p^x%g)^y=p^xy%g

技术分享图片

2、搭建apache或者nginx并使用自签证书实现https访问，自签名证书的域名自拟

此次我采用的是两Centos 7系统，CA主机为192.168.10.10，WEB主机为192.168.10.20
CA主机上创建私有CA

[root@localhost ~]# (umask 077;openssl genrsa -out /etc/pki/CA/private/cakey.pem 2048)
Generating RSA private key, 2048 bit long modulus
...+++
......+++
e is 65537 (0x10001)
[root@localhost ~]# openssl req -new -x509 -key /etc/pki/CA/private/cakey.pem -out /etc/pki/CA/cacert.pem -days 36You are about to be asked to enter information that will be incorporated
into your certificate request.
What you are about to enter is what is called a Distinguished Name or a DN.
There are quite a few fields but you can leave some blank
For some fields there will be a default value,
If you enter ‘.‘, the field will be left blank.
-----
Country Name (2 letter code) [XX]:CN
State or Province Name (full name) []:guanxi
Locality Name (eg, city) [Default City]:liuzhou
Organization Name (eg, company) [Default Company Ltd]:ops
Organizational Unit Name (eg, section) []:dev
Common Name (eg, your name or your server‘s hostname) []:xiaochen.com
Email Address []:
[root@localhost ~]# ls /etc/pki/CA/
cacert.pem  certs  crl  newcerts  private
[root@localhost ~]# cd /etc/pki/CA/
[root@localhost CA]# touch {serial,index.txt}
[root@localhost CA]# echo 01 > serial
[root@localhost CA]# ls
cacert.pem  certs  crl  index.txt  newcerts  private  serial
[root@localhost CA]# cat serial 
01
[root@localhost ~]# rz

[root@localhost ~]# ls
anaconda-ks.cfg  httpd.csr
[root@localhost ~]# openssl ca -in ./httpd.csr -out /etc/pki/CA/certs/httpd.crt -days 365
Using configuration from /etc/pki/tls/openssl.cnf
Check that the request matches the signature
Signature ok
Certificate Details:
        Serial Number: 1 (0x1)
        Validity
            Not Before: Nov 12 14:18:27 2018 GMT
            Not After : Nov 12 14:18:27 2019 GMT
        Subject:
            countryName               = CN
            stateOrProvinceName       = guanxi
            organizationName          = ops
            organizationalUnitName    = dev
            commonName                = xiaochen.com
        X509v3 extensions:
            X509v3 Basic Constraints: 
                CA:FALSE
            Netscape Comment: 
                OpenSSL Generated Certificate
            X509v3 Subject Key Identifier: 
                EB:53:54:71:C5:02:D9:8D:61:A9:0B:0A:9B:38:CE:38:DB:E1:E1:DF
            X509v3 Authority Key Identifier: 
                keyid:29:78:85:34:33:F9:88:E4:43:87:DC:4C:67:26:EB:05:48:29:E8:38

Certificate is to be certified until Nov 12 14:18:27 2019 GMT (365 days)
Sign the certificate? [y/n]:y

1 out of 1 certificate requests certified, commit? [y/n]y
Write out database with 1 new entries
Data Base Updated
[root@localhost ~]# ls
anaconda-ks.cfg  httpd.csr
[root@localhost ~]# openssl x509 -in /etc/pki/CA/certs/httpd.crt -noout -serial -subject
serial=01
subject= /C=CN/ST=guanxi/O=ops/OU=dev/CN=xiaochen.com
[root@localhost ~]# scp /etc/pki/CA/certs/httpd.crt root@192.168.10.20:/etc/httpd/ssl/
root@192.168.10.20‘s password: 
httpd.crt                                                                         100% 4431     2.2MB/s   00:00

WEB主机上配置相关服务

[root@localhost ~]# yum -y install httpd
[root@localhost ~]# yum -y install mod_ssl openssl
[root@localhost ~]# cd /etc/httpd/
[root@localhost httpd]# ls
conf  conf.d  conf.modules.d  logs  modules  run
[root@localhost httpd]# mkdir ssl
[root@localhost httpd]# cd ssl/
[root@localhost ssl]# (umask 077;openssl genrsa -out ./httpd.key 2048)
Generating RSA private key, 2048 bit long modulus
........................................................................................................+++
.......................................................+++
e is 65537 (0x10001)
[root@localhost ssl]# openssl req -new -key ./httpd.key -out ./httpd.csr -days 365
You are about to be asked to enter information that will be incorporated
into your certificate request.
What you are about to enter is what is called a Distinguished Name or a DN.
There are quite a few fields but you can leave some blank
For some fields there will be a default value,
If you enter ‘.‘, the field will be left blank.
-----
Country Name (2 letter code) [XX]:CN
State or Province Name (full name) []:guanxi
Locality Name (eg, city) [Default City]:liuzhou
Organization Name (eg, company) [Default Company Ltd]:ops
Organizational Unit Name (eg, section) []:dev
Common Name (eg, your name or your server‘s hostname) []:xiaochen.com
Email Address []:

Please enter the following ‘extra‘ attributes
to be sent with your certificate request
A challenge password []:123456
An optional company name []:
[root@localhost ~]# vi /var/www/html/index.html
[root@localhost ~]# systemctl restart httpd.service

Web页面访问
技术分享图片

3、简述DNS服务器原理，并搭建主-辅服务器
DNS服务器原理：
DNS也就是Domain Name Service的缩写，它的作用就是通过域名查找IP地址。DNS查询的类型对DNS于客户端来说是递归查询，对于DNS服务器端来说，绝大多数是迭代查询，在它的解析中，从名称到IP的查询叫做正向解析，而从IP到名称的查询叫做反向解析。如果DNS服务器至少解析了一个或一个以上的域叫做DNS主服务器或者DNS辅助服务器，如果不负责任何解析叫做DNS缓存服务器。现全球一共分布了13台DNS根服务器，名称为A至M。
域名解析过程：
1. 客户访问时，查找自己的hosts文件，有则返回，无则查找DNS服务器。
  2．DNS服务器查找中先从顶级域到二级域，分别获取他们的IP地址，然后最终获得域名的IP地址，找到服务器。
DNS区域数据库文件：
资源记录（resource record 简称rr）的类型有以下几种：
SOA：起始授权记录，只能有一个，必须放在第一条
NS：域名服务记录，其中一个为主，可以有多个
A：IPV4地址记录
AAAA：IPV6地址记录
CNAME：别名记录
PTR：反向解析记录
MX：邮件交换器

搭建主-辅服务器
安装软件

[root@localhost ~]# yum -y install bind
[root@localhost ~]# yum -y install bind-utils
[root@localhost ~]# systemctl start named
[root@localhost ~]# netstat -tunlp 
Active Internet connections (only servers)
Proto Recv-Q Send-Q Local Address           Foreign Address         State       PID/Program name    
tcp        0      0 127.0.0.1:53            0.0.0.0:*               LISTEN      9952/named          
tcp        0      0 0.0.0.0:22              0.0.0.0:*               LISTEN      960/sshd            
tcp        0      0 127.0.0.1:953           0.0.0.0:*               LISTEN      9952/named          
tcp        0      0 127.0.0.1:25            0.0.0.0:*               LISTEN      1099/master         
tcp6       0      0 ::1:53                  :::*                    LISTEN      9952/named          
tcp6       0      0 :::22                   :::*                    LISTEN      960/sshd            
tcp6       0      0 ::1:953                 :::*                    LISTEN      9952/named          
tcp6       0      0 ::1:25                  :::*                    LISTEN      1099/master         
udp        0      0 127.0.0.1:53            0.0.0.0:*                           9952/named          
udp6       0      0 ::1:53                  :::*                                9952/named

配置环境：

[root@localhost ~]# cat /etc/resolv.conf 
# Generated by NetworkManager
nameserver 192.168.10.10
[root@localhost ~]# 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 { 192.168.10.10; };
    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; };

    /* 
     - 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 no;
    dnssec-validation no;

    /* 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;
        };
};

zone "." IN {
    type hint;
    file "named.ca";
};

include "/etc/named.rfc1912.zones";
include "/etc/named.root.key";

配置解析一个正向区域

[root@localhost ~]# vi /etc/named.rfc1912.zones
zone "test.com" IN {
         type master;
         file "test.com.zone";
};
[root@localhost ~]# cat /var/named/test.com.zone 
$TTL 3600
$ORIGIN test.com.
@ IN SOA ns1.test.com. dnsadmin.test.com. (
        2018111301
        1H
        10M
        3D
        1D )
        IN NS ns1
        IN MX 10 mx1
        IN MX 20 mx2
ns1 IN A 192.168.10.10
MX1 IN A 192.168.10.20
MX2 IN A 192.168.10.20
www IN A 192.168.10.10
web IN CNAME www
[root@localhost ~]# chgrp named /var/named/test.com.zone
[root@localhost ~]# chmod o= /var/named/test.com.zone 
[root@localhost ~]# named-checkconf
[root@localhost ~]# named-checkzone test.com /var/named/test.com.zone 
zone test.com/IN: loaded serial 2018111301
OK

DNS主服务器正向解析测试

[root@localhost ~]# dig -t -A www.test.com
;; Warning, ignoring invalid type -A

; <<>> DiG 9.9.4-RedHat-9.9.4-61.el7_5.1 <<>> -t -A www.test.com
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 27177
;; flags: qr aa rd ra; QUERY: 1, ANSWER: 1, AUTHORITY: 1, ADDITIONAL: 2

;; OPT PSEUDOSECTION:
; EDNS: version: 0, flags:; udp: 4096
;; QUESTION SECTION:
;www.test.com.          IN  A

;; ANSWER SECTION:
www.test.com.       3600    IN  A   192.168.10.10

;; AUTHORITY SECTION:
test.com.       3600    IN  NS  ns1.test.com.

;; ADDITIONAL SECTION:
ns1.test.com.       3600    IN  A   192.168.10.10

;; Query time: 0 msec
;; SERVER: 192.168.10.10#53(192.168.10.10)
;; WHEN: Tue Nov 13 22:20:40 CST 2018
;; MSG SIZE  rcvd: 91
[root@localhost ~]# dig -t -A web.test.com
;; Warning, ignoring invalid type -A

; <<>> DiG 9.9.4-RedHat-9.9.4-61.el7_5.1 <<>> -t -A web.test.com
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 57437
;; flags: qr aa rd ra; QUERY: 1, ANSWER: 2, AUTHORITY: 1, ADDITIONAL: 2

;; OPT PSEUDOSECTION:
; EDNS: version: 0, flags:; udp: 4096
;; QUESTION SECTION:
;web.test.com.          IN  A

;; ANSWER SECTION:
web.test.com.       3600    IN  CNAME   www.test.com.
www.test.com.       3600    IN  A   192.168.10.10

;; AUTHORITY SECTION:
test.com.       3600    IN  NS  ns1.test.com.

;; ADDITIONAL SECTION:
ns1.test.com.       3600    IN  A   192.168.10.10

;; Query time: 0 msec
;; SERVER: 192.168.10.10#53(192.168.10.10)
;; WHEN: Tue Nov 13 22:21:07 CST 2018
;; MSG SIZE  rcvd: 109

配置反向区域

[root@localhost ~]# vi /etc/named.rfc1912.zones
zone "10.168.192.in-addr.arpa" IN {
        type master;
        file "192.168.10.zone";
};
[root@localhost ~]# cat /var/named/192.168.10.zone 
$TTL 3600
$ORIGIN 10.168.192.in-addr.arpa.
@ IN SOA ns1.test.com. nsadmin.test.com. (
        2018111301
        1H
        10M
        3D
        12H )
        IN NS ns1.test.com.
10 IN PTR ns1.test.com.
20 IN PTR mx1.test.com.
20 IN PTR mx2.test.com.
10 IN PTR www.test.com.
[root@localhost ~]# chgrp named /var/named/192.168.10.zone 
[root@localhost ~]# chmod o= /var/named/192.168.10.zone
[root@localhost ~]# named-checkconf
[root@localhost ~]# named-checkzone 10.168.192.in-addr.arpa /var/named/192.168.10.zone 
zone 10.168.192.in-addr.arpa/IN: loaded serial 2018111301
OK

主服务器反向测试

[root@localhost ~]# dig -x 192.168.10.10

; <<>> DiG 9.9.4-RedHat-9.9.4-61.el7_5.1 <<>> -x 192.168.10.10
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 2714
;; flags: qr aa rd ra; QUERY: 1, ANSWER: 2, AUTHORITY: 1, ADDITIONAL: 2

;; OPT PSEUDOSECTION:
; EDNS: version: 0, flags:; udp: 4096
;; QUESTION SECTION:
;10.10.168.192.in-addr.arpa.    IN  PTR

;; ANSWER SECTION:
10.10.168.192.in-addr.arpa. 3600 IN PTR www.test.com.
10.10.168.192.in-addr.arpa. 3600 IN PTR ns1.test.com.

;; AUTHORITY SECTION:
10.168.192.in-addr.arpa. 3600   IN  NS  ns1.test.com.

;; ADDITIONAL SECTION:
ns1.test.com.       3600    IN  A   192.168.10.10

;; Query time: 0 msec
;; SERVER: 192.168.10.10#53(192.168.10.10)
;; WHEN: Tue Nov 13 22:37:57 CST 2018
;; MSG SIZE  rcvd: 129

设置辅DNS服务器

[root@localhost ~]# yum -y install bind bind-utils
[root@localhost ~]# systemctl start named.service
[root@localhost ~]# cat /etc/resolv.conf 
# Generated by NetworkManager
nameserver 192.168.10.20
[root@localhost ~]# vi /etc/named.rfc1912.zones
zone "test.com" IN {
        type slave;
        file "slaves/test.com.zone";
        masters { 192.168.10.10; };
};

在主服务器上添加内容

[root@localhost ~]# cat /var/named/test.com.zone 
$TTL 3600
$ORIGIN test.com.
@ IN SOA ns1.test.com. dnsadmin.test.com. (
        2018111309
        1H
        10M
        3D
        1D )
        IN NS ns1
        IN NS ns2
        IN MX 10 mx1
        IN MX 20 mx2
ns1 IN A 192.168.10.10
ns2 IN A 192.168.10.20
MX1 IN A 192.168.10.21
MX2 IN A 192.168.10.22
www IN A 192.168.10.10
web IN CNAME www
pop3 IN A 192.168.10.25
[root@localhost ~]# named-checkzone test.com /var/named/test.com.zone 
zone test.com/IN: loaded serial 2018111309
OK
[root@localhost ~]# rndc reload
server reload successful

测试辅助服务器

[root@localhost slaves]# dig -t A www.test.com @192.168.10.20

; <<>> DiG 9.9.4-RedHat-9.9.4-61.el7 <<>> -t A www.test.com @192.168.10.20
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 45851
;; flags: qr aa rd ra; QUERY: 1, ANSWER: 1, AUTHORITY: 2, ADDITIONAL: 3

;; OPT PSEUDOSECTION:
; EDNS: version: 0, flags:; udp: 4096
;; QUESTION SECTION:
;www.test.com.          IN  A

;; ANSWER SECTION:
www.test.com.       3600    IN  A   192.168.10.10

;; AUTHORITY SECTION:
test.com.       3600    IN  NS  ns2.test.com.
test.com.       3600    IN  NS  ns1.test.com.

;; ADDITIONAL SECTION:
ns1.test.com.       3600    IN  A   192.168.10.10
ns2.test.com.       3600    IN  A   192.168.10.20

;; Query time: 0 msec
;; SERVER: 192.168.10.11#53(192.168.10.11)
;; WHEN: Thu May 31 23:20:16 EDT 2018
;; MSG SIZE  rcvd: 125

辅助服务器反向解析IP

[root@localhost ~]# dig -x 192.168.10.10 @192.168.10.20

; <<>> DiG 9.9.4-RedHat-9.9.4-61.el7 <<>> -x 192.168.10.10 @192.168.10.20
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 50592
;; flags: qr aa rd ra; QUERY: 1, ANSWER: 2, AUTHORITY: 2, ADDITIONAL: 3

;; OPT PSEUDOSECTION:
; EDNS: version: 0, flags:; udp: 4096
;; QUESTION SECTION:
;10.10.168.192.in-addr.arpa.    IN  PTR

;; ANSWER SECTION:
10.10.168.192.in-addr.arpa. 3600 IN PTR ns1.test.com.
10.10.168.192.in-addr.arpa. 3600 IN PTR www.test.com.

;; AUTHORITY SECTION:
10.168.192.in-addr.arpa. 3600   IN  NS  ns2.test.com.
10.168.192.in-addr.arpa. 3600   IN  NS  ns1.test.com.

;; ADDITIONAL SECTION:
ns1.test.com.       3600    IN  A   192.168.10.10
ns2.test.com.       3600    IN  A   192.168.10.20

;; Query time: 1 msec
;; SERVER: 192.168.10.11#53(192.168.10.20
;; WHEN: Fri Jun 01 02:25:17 EDT 2018
;; MSG SIZE  rcvd: 163

至此，主辅DNS服务器搭建完成

4、搭建并实现智能DNS

以192.168.10.10为例搭建智能DNS

修改DNS的named.conf的配置文件

view internal {
        match-clients { 192.168.10.10; };
        zone "." IN {
                type hint;
                file "named.ca";
        };
        include "/etc/named.rfc1912.zones";
        include "/etc/named.root.key";
};
view external {
        match-clients { any; };
        zone "." IN {
            type hint;
            file "named.ca";
        };
include "/etc/named.rfc1912.zones";
include "/etc/named.root.key";
};

建立两份数据文件

[root@localhost ~]# cat /var/named/test.com/internal 
$TTL 3600
$ORIGIN test.com.
@ IN SOA ns1.test.com. dnsadmin.test.com. (
        2018111602
        1H
        10M
        3D
        1D )
        IN NS ns1
ns1 IN A 192.168.10.10
www IN A 1.1.1.1
web IN CNAME www
bbs IN A 1.1.1.2
bbs IN A 1.1.1.3

[root@localhost ~]# cat /var/named/test.com/external 
$TTL 3600
$ORIGIN test.com.
@ IN SOA ns1.test.com. dnsadmin.test.com. (
        2018111501
        1H
        10M
        3D
        1D )
        IN NS ns1
ns1 IN A 192.168.10.10
www IN A 192.168.10.10
web IN CNAME www
bbs IN A 192.168.10.20
bbs IN A 192.168.10.20

设置权限

[root@localhost ~]# named-checkconf
[root@localhost ~]# named-checkzone test.com /var/named/test.com/internal 
zone test.com/IN: loaded serial 2018111602
OK
[root@localhost ~]# named-checkzone test.com /var/named/test.com/external 
zone test.com/IN: loaded serial 2018111501
OK
[root@localhost ~]# chgrp named /var/named/test.com/{internal,external}
[root@localhost ~]# chmod o= /var/named/test.com/{internal,external}
[root@localhost ~]# rndc reload
server reload successful

解析内网IP

[root@localhost ~]# dig -t A www.test.com @192.168.10.10

; <<>> DiG 9.9.4-RedHat-9.9.4-61.el7_5.1 <<>> -t A www.test.com @192.168.10.10
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 38238
;; flags: qr aa rd ra; QUERY: 1, ANSWER: 1, AUTHORITY: 2, ADDITIONAL: 3

;; OPT PSEUDOSECTION:
; EDNS: version: 0, flags:; udp: 4096
;; QUESTION SECTION:
;www.test.com.          IN  A

;; ANSWER SECTION:
www.test.com.       3600    IN  A   192.168.10.10

;; AUTHORITY SECTION:
test.com.       3600    IN  NS  ns2.test.com.
test.com.       3600    IN  NS  ns1.test.com.

;; ADDITIONAL SECTION:
ns1.test.com.       3600    IN  A   192.168.10.10
ns2.test.com.       3600    IN  A   192.168.10.20

;; Query time: 0 msec
;; SERVER: 192.168.10.10#53(192.168.10.10)
;; WHEN: Fri Nov 16 14:58:57 CST 2018
;; MSG SIZE  rcvd: 125

解析外网IP

[root@localhost ~]# dig -t A www.test.com @192.168.10.10

; <<>> DiG 9.9.4-RedHat-9.9.4-61.el7_5.1 <<>> -t A www.test.com @192.168.10.10
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 18774
;; flags: qr aa rd ra; QUERY: 1, ANSWER: 1, AUTHORITY: 2, ADDITIONAL: 3

;; OPT PSEUDOSECTION:
; EDNS: version: 0, flags:; udp: 4096
;; QUESTION SECTION:
;www.test.com.          IN  A

;; ANSWER SECTION:
www.test.com.       3600    IN  A   1.1.1.1

;; AUTHORITY SECTION:
test.com.       3600    IN  NS  ns1.test.com.
test.com.       3600    IN  NS  ns2.test.com.

;; ADDITIONAL SECTION:
ns1.test.com.       3600    IN  A   192.168.10.10
ns2.test.com.       3600    IN  A   192.168.10.20

;; Query time: 0 msec
;; SERVER: 192.168.10.10#53(192.168.10.10)
;; WHEN: Fri Nov 16 15:19:01 CST 2018
;; MSG SIZE  rcvd: 125

加密算法与DNS服务搭建

标签：hal 软件签证 section day ttl 客户端 blog ffffff

原文地址：http://blog.51cto.com/13929964/2317996

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