Shulou(Shulou.com)06/01 Report--

There are too many users accessing the host. Open the extension to lighten the burden.

Mainframe

Zone "taxing.com" IN {

Type master

File "taxing.com.zone"

Allow-update {none;}

Allow-transfer {172.25.254.224;}

Slave machine

Zone "taxing.com" IN {

Type slave

Masters {172.25.254.124;}

File "slaves/taxing.com.zone"

Allow-update {none;}

Time synchronization

Mainframe

Vim / var/namedtaxing.com.zone

$TTL 1D

@ IN SOA dns.taxing.com. Root.taxing.com. (

201611261; serial # is a maximum of ten-digit files to view and compare the values when updating, and update if different (rm-rf / var/name/slaves/taxing.com.zone; systemctl restart named)

1D; refresh

1H; retry

1W; expire

3H); minimum

NS dns

Dns A 172.25.254.124

Www A 172.25.254.138

~

Change the series value every time you modify the ip

Vim / etc/name.rfc1912.zones

Zone "taxing.com" IN {

Type master

File "taxing.com.zone"

Allow-update {none;}

Allow-transfer {172.25.254.224;}

Also-notify {172.25.254.224;}; # # Notification slave after modification

}

Remote control modification

Client

Setenforce 0

[root@localhost slaves] # nsupdate

> server 172.25.254.124

> update delete www.taxing.com

> update add www.taxing.com 86400 A 172.25.254.138 # 86400s cache time

> send

> quit

Mainframe

Setenforc 0

Vim / etc/named.rfc1912.zones

Zone "taxing.com" IN {

Type master

File "taxing.com.zone"

Allow-update {172.25.254.224;}

}

Chmod 770 / var/name/

Reboot will synchronize the updated content, first backup cp-p taxing.com.zone / mnt and then delete taxing.com.zone.jnl and synchronized taxing.com.zone to copy the backed-up taxing.com.zone back to cp-p / mnt/taxing.com.zone.

Secret key authentication

Mainframe

Dnssec-keygen-a HMAC-MD5-b 128-n HOST taxing

Cat Ktaxing.+157+22634.key

Cat Ktaxing.+157+22634.private

Cp-p / etc/rndc.key / etc/taxing.key

Vim / etc/taxing.key

Key "taxing" {

Algorithm hmac-md5

Secret "YtJ6Y7kyfL5moClanMIS6Q=="

}

Vim / etc/named.rfc1912.zones

Zone "taxing.com" IN {

Type master

File "taxing.com.zone"

Allow-update {key taxing;}

}

Systemctl restart named

Scp Ktaxing.+157+22634.* root@172.25.254.224:/mnt/

Client

[root@localhost mnt] # nsupdate-k Ktaxing.+157+22634.private

> server 172.25.254.124

> update delete www.taxing.com

> send

> quit

Dynamic dhcp DNS acquisition of Peanut Shell

Mainframe

Vim / etc/dhcp/dhcpd.conf

# Use this to enble / disable dynamic dns updates globally.

Ddns-update-style interim

Subnet 172.25.254.0 netmask 255.255.255.0 {

Range 172.25.254.224 172.25.254.242

Option routers 172.25.254.124

}

Key taxing {

Algorithm hmac-md5

Secret YtJ6Y7kyfL5moClanMIS6Q==

}

Zone taxing.com. {

Primary 127.0.0.1

Key taxing

}

Vim / var/name/taxing.com.zone

41 # 1-8 90%

Client

Open dynamic acquisition dhcp

Hostnamectl set-hostname timo.taxing.com

Dig timo.taxing.com

Gnome-screenshot-a # screenshot

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