如何在另一个文件中为 mac 地址保留 dhcp？

Question 1

您可以使用来限制地址池deny unknown-clients;。这样，只有出现在host声明中的 MAC 地址才会收到 IP。

并且您不需要在声明fixed-address中指定host。

一个最小（且未经测试）的例子可能看起来像这样

subnet 192.168.0.0 netmask 255.255.0.0 {
    # option routers 192.168.1.1;
    # option ... etc.

    pool {
            range 192.168.100.1 192.168.101.254;
            deny unknown-clients;
    }
}

include "/etc/dhcpd/known-hosts.conf";

在“/etc/dhcpd/known-hosts.conf”中，可以使用 MAC 地址列表中的脚本轻松生成：

host h1 { hardware ethernet 00:09:b0:48:ca:ec; }
host h2 { hardware ethernet 00:80:88:11:e0:9f; }

Answer

您可以使用来限制地址池deny unknown-clients;。这样，只有出现在host声明中的 MAC 地址才会收到 IP。

并且您不需要在声明fixed-address中指定host。

一个最小（且未经测试）的例子可能看起来像这样

subnet 192.168.0.0 netmask 255.255.0.0 {
    # option routers 192.168.1.1;
    # option ... etc.

    pool {
            range 192.168.100.1 192.168.101.254;
            deny unknown-clients;
    }
}

include "/etc/dhcpd/known-hosts.conf";

在“/etc/dhcpd/known-hosts.conf”中，可以使用 MAC 地址列表中的脚本轻松生成：

host h1 { hardware ethernet 00:09:b0:48:ca:ec; }
host h2 { hardware ethernet 00:80:88:11:e0:9f; }

Question 2

我根据我保留的一个旧脚本制作了这个脚本。

#!/bin/bash

if [ "$EUID" -ne 0 ];
  then echo "Please run as root (sudo)"
  exit
fi

PATH_DHCP_FILE="./test.conf"
PATH_DHCP_TRUST_FILE="./trust_host"
PATH_STUDENTS_FILE="students.list"
PATH_DHCP_LEASES="/var/lib/dhcp/dhcpd.leases"

DATE=`date '+%Y-%m-%d %H:%M'`

IP_RANGE_DEFAULT='192.168.1.50 192.168.1.100'
NETMASK_DEFAULT='255.255.255.0'
AGREE_DEFAULT='yes'

echo ""
echo "|==========================================================|"
echo "|**********************************************************|"
echo "|                       DHCP CONF                          |"
echo "|   Welcome to this configuration Script for DHCP Server.  |"
echo "|                                                          |"
echo "|**********************************************************|"
echo "|==========================================================|"
echo ""
echo "CTRL-C to leave"
echo ""

read -p "WARNING. The file $PATH_DHCP_FILE will be edit. Do you want to continue ? [yes] " AGREE
AGREE=${AGREE:-$AGREE_DEFAULT}

if [ "$AGREE" != 'yes' ]
  then echo "Stop script."
  exit
fi

echo ""
echo "Please, fill the following informations (be care about the syntax)"
read -p "Network IP [192.168.1.0]: " IP
read -p "Netmask [255.255.255.0]: " NETMASK
read -p "IP Range [192.168.1.50 192.168.1.100]: " IP_RANGE
IP=${IP:-$IP_DEFAULT}
NETMASK=${NETMASK:-$NETMASK_DEFAULT}
IP_RANGE=${IP_RANGE:-$IP_RANGE_DEFAULT}

echo ""
echo "--DHCP Configuration--"
echo "----Append configuration to $PATH_DHCP_FILE----"
echo "

# ============================
# *DCHP Script configurations*
# ***$DATE***
subnet $IP netmask $NETMASK {
  range $IP_RANGE;
  deny unknown-clients;
}

include \"$PATH_DHCP_TRUST_FILE\";
# ============================
" >> $PATH_DHCP_FILE

echo ""
ADD_MAC_DEFAULT='yes'

echo "# ***$DATE***" >> $PATH_DHCP_TRUST_FILE
while IFS='' read -r line || [[ -n "$line" ]]; do
    echo "Text read from file: $line"
    studenMac=$(echo $line| cut -d' ' -f 1)
    student=$(echo $line| cut -d' ' -f 2)

    echo "Studen mac : $studenMac"
    echo "Studen host : $student"
    echo "Add $student with $studenMac"
    echo "host $student { hardware ethernet $studenMac; }" >> $PATH_DHCP_TRUST_FILE
done < "$PATH_STUDENTS_FILE"

编辑 PATH_DHCP_FILE、PATH_DHCP_TRUST_FILE 和 PATH_STUDENTS_FILE 变量并在脚本询问信息时完成。

我这边的测试文件中有结果：

对于文件 test.conf (/etc/dhcpd.conf)

# ============================
# *DCHP Script configurations*
# ***2018-03-19 17:36***
subnet  netmask 255.255.255.0 {
  range 192.168.1.50 192.168.1.100;
  deny unknown-clients;
}

include "./trust_host";
# ============================

在文件 trust_host 中：

# ***2018-03-19 18:44***
host Prajwal { hardware ethernet 94:92:66:38:a6:79; }
host Prajwal { hardware ethernet 30:e1:71:c9:1b:43; }
host Unique { hardware ethernet 94:65:2d:23:a8:4d; }
host Anup { hardware ethernet 84:8f:69:ca:15:00; }
host Anup { hardware ethernet 88:83:22:eb:1e:41; }

请小心，我不处理重复。

我希望这会有所帮助。

Answer