20190529

iptables

iptables重點:

[server]

# iptables -F
# iptables -L
# iptalbes -I INPUT -p tcp --dport 80 -j ACCEPT
# iptalbes -I INPUT -p tcp --dport 22 -j ACCEPT
# iptalbes -I INPUT -p tcp --dport 10:21 -j ACCEPT
# iptables -L
# iptalbes -I INPUT -p icmp -j ACCEPT
# iptables -A INPUT -j REJECT

[client]

# yum install nmap
# nmap -sS -p 0-1000 192.168.56.101

[server]

# iptables -D INPUT -p tcp --dport 80 -j ACCEPT
# iptables -I INPUT -p tcp --dport 80 -j ACCEPT

[client]

# nmap -sS -p 0-1000 192.168.56.101