firewall命令过滤
firewall-cmd --direct --add-rule ipv4 filter OUTPUT 1 -m string –string “123” –algo kmp -j DROP
检查:
firewall-cmd --direct --get-all-rules
firewall-cmd --direct --add-rule ipv4 filter OUTPUT 1 -m string –string “123” –algo kmp -j DROP
检查:
firewall-cmd --direct --get-all-rules
轻量dhcp dns tftp
apt install dnsmasq
dhcp
dhcp-range=192.168.200.50,192.168.200.150,12h
dns书写hosts文件实现正方向
tftp
enable-tftp
tftp-root=/srv/tftp
https://askubuntu.com/questions/1292032/how-can-current-ubuntu-versions-be-installed-via-pxe-network-boot-and-an-automat