服务器之家

服务器之家 > 正文

阿里云linux服务器安全设置(防火墙策略等)

时间:2021-11-14 17:24     来源/作者:服务器技术网

首先需要进行linux的基础安全设置,可以先参考这篇文章

http://www.zzvips.com/article/204472.html

1、Linux系统脚本

?
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
#!/bin/bash
#########################################
#Function: linux drop port
#Usage:  bash linux_drop_port.sh
#Author:  Customer Service Department
#Company:  Alibaba Cloud Computing
#Version:  2.0
#########################################
 
check_os_release()
{
 while true
 do
 os_release=$(grep "Red Hat Enterprise Linux Server release"/etc/issue 2>/dev/null)
 os_release_2=$(grep "Red Hat Enterprise Linux Server release"/etc/redhat-release 2>/dev/null)
 if [ "$os_release" ] && [ "$os_release_2" ]
 then
  if echo "$os_release"|grep "release 5" >/dev/null2>&1
  then
  os_release=redhat5
  echo "$os_release"
  elif echo "$os_release"|grep "release 6">/dev/null 2>&1
  then
  os_release=redhat6
  echo "$os_release"
  else
  os_release=""
  echo "$os_release"
  fi
  break
 fi
 os_release=$(grep "Aliyun Linux release" /etc/issue2>/dev/null)
 os_release_2=$(grep "Aliyun Linux release" /etc/aliyun-release2>/dev/null)
 if [ "$os_release" ] && [ "$os_release_2" ]
 then
  if echo "$os_release"|grep "release 5" >/dev/null2>&1
  then
  os_release=aliyun5
  echo "$os_release"
  elif echo "$os_release"|grep "release 6">/dev/null 2>&1
  then
  os_release=aliyun6
  echo "$os_release"
  else
  os_release=""
  echo "$os_release"
  fi
  break
 fi
 os_release=$(grep "CentOS release" /etc/issue 2>/dev/null)
 os_release_2=$(grep "CentOS release" /etc/*release2>/dev/null)
 if [ "$os_release" ] && [ "$os_release_2" ]
 then
  if echo "$os_release"|grep "release 5" >/dev/null2>&1
  then
  os_release=centos5
  echo "$os_release"
  elif echo "$os_release"|grep "release 6">/dev/null 2>&1
  then
  os_release=centos6
  echo "$os_release"
  else
  os_release=""
  echo "$os_release"
  fi
  break
 fi
 os_release=$(grep -i "ubuntu" /etc/issue 2>/dev/null)
 os_release_2=$(grep -i "ubuntu" /etc/lsb-release2>/dev/null)
 if [ "$os_release" ] && [ "$os_release_2" ]
 then
  if echo "$os_release"|grep "Ubuntu 10" >/dev/null2>&1
  then
  os_release=ubuntu10
  echo "$os_release"
  elif echo "$os_release"|grep "Ubuntu 12.04">/dev/null 2>&1
  then
  os_release=ubuntu1204
  echo "$os_release"
  elif echo "$os_release"|grep "Ubuntu 12.10">/dev/null 2>&1
  then
  os_release=ubuntu1210
  echo "$os_release"
  else
  os_release=""
  echo "$os_release"
  fi
  break
 fi
 os_release=$(grep -i "debian" /etc/issue 2>/dev/null)
 os_release_2=$(grep -i "debian" /proc/version 2>/dev/null)
 if [ "$os_release" ] && [ "$os_release_2" ]
 then
  if echo "$os_release"|grep "Linux 6" >/dev/null2>&1
  then
  os_release=debian6
  echo "$os_release"
  else
  os_release=""
  echo "$os_release"
  fi
  break
 fi
 os_release=$(grep "openSUSE" /etc/issue 2>/dev/null)
 os_release_2=$(grep "openSUSE" /etc/*release 2>/dev/null)
 if [ "$os_release" ] && [ "$os_release_2" ]
 then
  if echo "$os_release"|grep"13.1" >/dev/null 2>&1
  then
  os_release=opensuse131
  echo "$os_release"
  else
  os_release=""
  echo "$os_release"
  fi
  break
 fi
 break
 done
}
 
exit_script()
{
 echo -e "\033[1;40;31mInstall $1 error,will exit.\n\033[0m"
 rm-f $LOCKfile
 exit 1
}
 
config_iptables()
{
 iptables -I OUTPUT 1 -p tcp -m multiport --dport21,22,23,25,53,80,135,139,443,445 -j DROP
 iptables -I OUTPUT 2 -p tcp -m multiport --dport 1433,1314,1521,2222,3306,3433,3389,4899,8080,18186-j DROP
 iptables -I OUTPUT 3 -p udp -j DROP
 iptables -nvL
}
 
ubuntu_config_ufw()
{
 ufwdeny out proto tcp to any port 21,22,23,25,53,80,135,139,443,445
 ufwdeny out proto tcp to any port 1433,1314,1521,2222,3306,3433,3389,4899,8080,18186
 ufwdeny out proto udp to any
 ufwstatus
}
 
####################Start###################
#check lock file ,one time only let thescript run one time
LOCKfile=/tmp/.$(basename $0)
if [ -f "$LOCKfile" ]
then
 echo -e "\033[1;40;31mThe script is already exist,please next timeto run this script.\n\033[0m"
 exit
else
 echo -e "\033[40;32mStep 1.No lock file,begin to create lock fileand continue.\n\033[40;37m"
 touch $LOCKfile
fi
 
#check user
if [ $(id -u) != "0" ]
then
 echo -e "\033[1;40;31mError: You must be root to run this script,please use root to execute this script.\n\033[0m"
 rm-f $LOCKfile
 exit 1
fi
 
echo -e "\033[40;32mStep 2.Begen tocheck the OS issue.\n\033[40;37m"
os_release=$(check_os_release)
if [ "X$os_release" =="X" ]
then
 echo -e "\033[1;40;31mThe OS does not identify,So this script isnot executede.\n\033[0m"
 rm-f $LOCKfile
 exit 0
else
 echo -e "\033[40;32mThis OS is $os_release.\n\033[40;37m"
fi
 
echo -e "\033[40;32mStep 3.Begen toconfig firewall.\n\033[40;37m"
case "$os_release" in
redhat5|centos5|redhat6|centos6|aliyun5|aliyun6)
 service iptables start
 config_iptables
 ;;
debian6)
 config_iptables
 ;;
ubuntu10|ubuntu1204|ubuntu1210)
 ufwenable <<EOF
y
EOF
 ubuntu_config_ufw
 ;;
opensuse131)
 config_iptables
 ;;
esac
 
echo -e "\033[40;32mConfig firewallsuccess,this script now exit!\n\033[40;37m"
rm -f $LOCKfile

上述文件下载到机器内部直接执行即可。

2、设置iptables,限制访问

?
1
2
3
4
5
6
7
8
9
10
11
12
13
/sbin/iptables -P INPUT ACCEPT
/sbin/iptables -F
/sbin/iptables -X
/sbin/iptables -Z
 
/sbin/iptables -A INPUT -i lo -j ACCEPT
/sbin/iptables -A INPUT -p tcp --dport 22 -j ACCEPT
/sbin/iptables -A INPUT -p tcp --dport 80 -j ACCEPT
/sbin/iptables -A INPUT -p tcp --dport 8080 -j ACCEPT
/sbin/iptables -A INPUT -p icmp -m icmp --icmp-type 8 -j ACCEPT
/sbin/iptables -A INPUT -m state --state ESTABLISHED -j ACCEPT
/sbin/iptables -P INPUT DROP
 service iptables save

以上脚本,在每次重装完系统后执行一次即可,其配置会保存至/etc/sysconfig/iptables

更详细的可以参考这篇文章 http://www.zzvips.com/article/204471.html

3、常用网络监控命令
(1) netstat -tunl:查看所有正在监听的端口

?
1
2
3
4
5
6
7
8
[root@AY1407041017110375bbZ ~]# netstat -tunl
Active Internet connections (only servers)
Proto Recv-Q Send-Q Local Address    Foreign Address    State 
tcp  0  0 0.0.0.0:22     0.0.0.0:*     LISTEN 
udp  0  0 ip:123   0.0.0.0:*       
udp  0  0 ip:123   0.0.0.0:*       
udp  0  0 127.0.0.1:123    0.0.0.0:*       
udp  0  0 0.0.0.0:123     0.0.0.0:*

其中123端口用于NTP服务。
(2)netstat -tunp:查看所有已连接的网络连接状态,并显示其PID及程序名称。

?
1
2
3
4
5
[root@AY1407041017110375bbZ ~]# netstat -tunp
Active Internet connections (w/o servers)
Proto Recv-Q Send-Q Local Address               Foreign Address             State       PID/Program name   
tcp        0     96 ip:22            221.176.33.126:52699        ESTABLISHED 926/sshd            
tcp        0      0 ip:34385         42.156.166.25:80            ESTABLISHED 1003/aegis_cli

根据上述结果,可以根据需要kill掉相应进程。
如:
kill -9 1003

(3)netstat -tunlp
(4)netstat常用选项说明:

-t: tcp  
-u : udp
-l, --listening
       Show only listening sockets.  (These are omitted by default.)
-p, --program
       Show the PID and name of the program to which each socket belongs.
--numeric , -n
Show numerical addresses instead of trying to determine symbolic host, port or user names.

4、修改ssh的监听端口

(1)修改 /etc/ssh/sshd_config

原有的port 22

改为port 44

(2)重启服务

/etc/init.d/sshd restart
(3)查看情况

?
1
2
3
4
5
6
7
8
netstat -tunl
Active Internet connections (only servers)
Proto Recv-Q Send-Q Local Address    Foreign Address    State 
tcp  0  0 0.0.0.0:44    0.0.0.0:*     LISTEN 
udp  0  0 ip:123   0.0.0.0:*       
udp  0  0 ip:123   0.0.0.0:*       
udp  0  0 127.0.0.1:123    0.0.0.0:*       
udp  0  0 0.0.0.0:123     0.0.0.0:*

 

相关文章

热门资讯

2022年最旺的微信头像大全 微信头像2022年最新版图片
2022年最旺的微信头像大全 微信头像2022年最新版图片 2022-01-10
蜘蛛侠3英雄无归3正片免费播放 蜘蛛侠3在线观看免费高清完整
蜘蛛侠3英雄无归3正片免费播放 蜘蛛侠3在线观看免费高清完整 2021-08-24
背刺什么意思 网络词语背刺是什么梗
背刺什么意思 网络词语背刺是什么梗 2020-05-22
yue是什么意思 网络流行语yue了是什么梗
yue是什么意思 网络流行语yue了是什么梗 2020-10-11
暖暖日本高清免费中文 暖暖在线观看免费完整版韩国
暖暖日本高清免费中文 暖暖在线观看免费完整版韩国 2021-05-08
返回顶部