使用iptables屏蔽攻击者访问者ip

$ apt-get install iptables -y

$ iptables -V

$  netstat -tun | grep ":80"

$ netstat -antp | awk '$4 ~ /:80$/ {print $4" "$5}' | awk '{print $2}'|awk -F : {'print $1'} | uniq -c | sort -nr | head -n 10

$ netstat -plan|grep :80|awk {'print $5'}|cut -d: -f 1|sort|uniq -c|sort -nk 1

$ netstat -na

$ netstat -an|awk -F: '{print $2}'|sort|uniq -c|sort -nr|head

$ netstat -n -p | grep SYN_REC | sort -u

$ netstat -ntu | awk '{print $5}' | cut -d: -f1 | sort | uniq -c | sort -n

$ iptables -L

$ iptables -L -n

$ iptables -I INPUT -s ***.***.***.*** -j DROP

$ iptables -I INPUT -s 202.60.228.135 -j DROP
$ iptables -I INPUT -s 47.112.148.83 -j DROP
$ iptables -I INPUT -s 208.115.232.242 -j DROP
$ iptables -I INPUT -s 63.143.61.22 -j DROP

$ iptables -I INPUT -s ***.***.***.***/24 -j DROP

$ iptables -I INPUT -s 1.2.3.0/24 -j DROP

$ iptables -D INPUT -s ***.***.***.*** -j DROP

$ iptables-save > /etc/iptables.rules

pre-up iptables-restore < /etc/iptables.rules

$ iptables --help
iptables v1.6.1

Usage: iptables -[ACD] chain rule-specification [options]
       iptables -I chain [rulenum] rule-specification [options]
       iptables -R chain rulenum rule-specification [options]
       iptables -D chain rulenum [options]
       iptables -[LS] [chain [rulenum]] [options]
       iptables -[FZ] [chain] [options]
       iptables -[NX] chain
       iptables -E old-chain-name new-chain-name
       iptables -P chain target [options]
       iptables -h (print this help information)

Commands:
Either long or short options are allowed.
  --append  -A chain		Append to chain
  --check   -C chain		Check for the existence of a rule
  --delete  -D chain		Delete matching rule from chain
  --delete  -D chain rulenum
				Delete rule rulenum (1 = first) from chain
  --insert  -I chain [rulenum]
				Insert in chain as rulenum (default 1=first)
  --replace -R chain rulenum
				Replace rule rulenum (1 = first) in chain
  --list    -L [chain [rulenum]]
				List the rules in a chain or all chains
  --list-rules -S [chain [rulenum]]
				Print the rules in a chain or all chains
  --flush   -F [chain]		Delete all rules in  chain or all chains
  --zero    -Z [chain [rulenum]]
				Zero counters in chain or all chains
  --new     -N chain		Create a new user-defined chain
  --delete-chain
            -X [chain]		Delete a user-defined chain
  --policy  -P chain target
				Change policy on chain to target
  --rename-chain
            -E old-chain new-chain
				Change chain name, (moving any references)
Options:
    --ipv4	-4		Nothing (line is ignored by ip6tables-restore)
    --ipv6	-6		Error (line is ignored by iptables-restore)
[!] --protocol	-p proto	protocol: by number or name, eg. `tcp'
[!] --source	-s address[/mask][...]
				source specification
[!] --destination -d address[/mask][...]
				destination specification
[!] --in-interface -i input name[+]
				network interface name ([+] for wildcard)
 --jump	-j target
				target for rule (may load target extension)
  --goto      -g chain
                              jump to chain with no return
  --match	-m match
				extended match (may load extension)
  --numeric	-n		numeric output of addresses and ports
[!] --out-interface -o output name[+]
				network interface name ([+] for wildcard)
  --table	-t table	table to manipulate (default: `filter')
  --verbose	-v		verbose mode
  --wait	-w [seconds]	maximum wait to acquire xtables lock before give up
  --wait-interval -W [usecs]	wait time to try to acquire xtables lock
				default is 1 second
  --line-numbers		print line numbers when listing
  --exact	-x		expand numbers (display exact values)
[!] --fragment	-f		match second or further fragments only
  --modprobe=<command>		try to insert modules using this command
  --set-counters PKTS BYTES	set the counter during insert/append
[!] --version	-V		print package version.