在Bash中并行迭代IP地址

在Bash中并行迭代IP地址

本文介绍了在Bash中并行迭代IP地址的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!

问题描述

我处理的是一个大型的私有/ 8网络,需要枚举所有正在侦听端口443并具有在其HTTP HEADER响应中指定的特定版本的网络服务器。



首先我想通过输出文件连接扫描和grep自己运行 nmap ,但结果是抛出许多假阳性,其中 nmap 表示端口被过滤,而实际上是打开(使用连接扫描: nmap -sT -sV -Pn -n -oA foo 10.0.0.0 / 8 -p 443 )。



现在我想用bash和 curl - 伪代码将是:

 对于10.0.0.0/8中的每个IP 
do:
curl --head https:// {IP}:443 | grep -iE(Server \:\ Target)> {IP} _info.txt;
done

由于我不熟悉bash我不知道如何请妥善处理这个问题 - 我必须:




  • 循环浏览所有IP

  • X威胁并行运行

  • 最好将输出剪切到一个文件中只记下匹配主机的IP

  • 匹配的服务器版本记录在下面



任何建议或指向的方向都非常感激。

较小的 IP地址跨度,小规模 - 迭代

建议按如下方式进行迭代:

  for ip in 192.168.1。 do ... 

如。





大规模 - 并行!



您的问题涉及巨大 IP地址范围,您应该考虑采用不同的方法。



乞求使用。



使用在bash中并行迭代大量IP地址需要拆分逻辑到几个文件(用于并行命令使用)。




ip2int



  #!/ bin / bash 

设置-e

函数ip_to_int()
{
本地IP =$ 1
本地A = $(echo $ IP | cut -d。-f1)
local B = $(echo $ IP | cut -d。-f2)
local C = $(echo $ IP | cut -d 。-f3)
local D = $(echo $ IP | cut -d。-f4)
local INT

INT = $(expr 256*256* 256*$ A)
INT = $(expr 256*256*$ B + $ INT)
INT = $(expr 256*$ C + $ INT)
INT = $(expr $ D + $ INT)

echo $ INT
}

函数int_to_ip()
{
local INT =$ 1

local D = $(expr $ INT%256)
local C = $(expr'('$ INT - $ D')'/ 256 %256)
local B = $(expr'('$ INT - $ C - $ D')'/ 65536%256)
local A = $(expr'('$ INT - $ B - $ C - $ D')'/ 16777216%256)

echo$ A. $ B. $ C. $ D
}





scan_ip



 #!/ bin / bash 

设置-e

源ip2int
$ b b if [[$#-ne 1]];那么
echo用法:$(basename$ 0)ip_address_number
exit 1
fi

CONNECT_TIMEOUT = 2#以秒为单位
IP_ADDRESS = $(int_to_ip $ {1})

set + e
data = $(curl --head -vs -m $ {CONNECT_TIMEOUT} https:// $ {IP_ADDRESS}:443 2& 1)
exit_code =$?
data = $(echo -e$ {data}| grepServer:)
#不确定你在你的服务器中找什么
set -e

if [[$ {exit_code} -eq 0]];那么
if [[-n$ {data}]];那么
echo$ {IP_ADDRESS} - $ {data}
else
echo$ {IP_ADDRESS} - 获取服务器的空数据!
fi
else
echo$ {IP_ADDRESS} - 无服务器。
fi





scan_range



 #!/ bin / bash 

set -e

source ip2int

START_ADDRESS =10.0.0.0
NUM_OF_ADDRESSES =16777216#256 * 256 * 256

start_address_num = $(ip_to_int $ {START_ADDRESS})
end_address_num = $((start_address_num + NUM_OF_ADDRESSES))

seq $ {start_address_num} $ {end_address_num} |并行-P0 ./scan_ip

#这个并行调用与下面的一样:

#用于$(seq $ {start_address_num} $ {end_address_num})中的ip_num。 do
#./scan_ip $ {ip_num}
#done

#只有一个更快!




迭代方法:




I'm dealing with a large private /8 network and need to enumerate all webservers which are listening on port 443 and have a specific version stated in their HTTP HEADER response.

First I was thinking to run nmap with connect scans and grep myself through the output files, but this turned out to throw many false-positives where nmap stated a port to be "filtered" while it actually was "open" (used connect scans: nmap -sT -sV -Pn -n -oA foo 10.0.0.0/8 -p 443).

So now I was thinking to script something with bash and curl - pseudo code would be like:

for each IP in 10.0.0.0/8
do:
    curl --head https://{IP}:443 | grep -iE "(Server\:\ Target)" > {IP}_info.txt;
done

As I'm not that familiar with bash I'm not sure how to script this properly - I would have to:

  • loop through all IPs
  • make sure that only X threats run in parallel
  • ideally cut the output to only note down the IP of the matching host in one single file
  • ideally make sure that only matching server versions are noted down

Any suggestion or pointing into a direction is highly appreciated.

解决方案

Small Scale - iterate

for a smaller IP address span it would probably be recommended to iterate like this:

for ip in 192.168.1.{1..10}; do ...

As stated in this similar question.


Big Scale - parallel !

Given that your problem deals with a huge IP address span you should probably consider a different approach.

This begs for the use of gnu parallel.

Parallel iterating a big span of IP addresses in bash using gnu parallel requires splitting the logic to several files (for the parallel command to use).

ip2int

#!/bin/bash

set -e

function ip_to_int()
{
  local IP="$1"
  local A=$(echo $IP | cut -d. -f1)
  local B=$(echo $IP | cut -d. -f2)
  local C=$(echo $IP | cut -d. -f3)
  local D=$(echo $IP | cut -d. -f4)
  local INT

  INT=$(expr 256 "*" 256 "*" 256 "*" $A)
  INT=$(expr 256 "*" 256 "*" $B + $INT)
  INT=$(expr 256 "*" $C + $INT)
  INT=$(expr $D + $INT)

  echo $INT
}

function int_to_ip()
{
  local INT="$1"

  local D=$(expr $INT % 256)
  local C=$(expr '(' $INT - $D ')' / 256 % 256)
  local B=$(expr '(' $INT - $C - $D ')' / 65536 % 256)
  local A=$(expr '(' $INT - $B - $C - $D ')' / 16777216 % 256)

  echo "$A.$B.$C.$D"
}



scan_ip

#!/bin/bash

set -e

source ip2int

if [[ $# -ne 1 ]]; then
    echo "Usage: $(basename "$0") ip_address_number"
    exit 1
fi

CONNECT_TIMEOUT=2 # in seconds
IP_ADDRESS="$(int_to_ip ${1})"

set +e
data=$(curl --head -vs -m ${CONNECT_TIMEOUT} https://${IP_ADDRESS}:443 2>&1)
exit_code="$?"
data=$(echo -e "${data}" | grep "Server: ")
     # wasn't sure what are you looking for in your servers
set -e

if [[ ${exit_code} -eq 0 ]]; then
    if [[ -n "${data}" ]]; then
        echo "${IP_ADDRESS} - ${data}"
    else
        echo "${IP_ADDRESS} - Got empty data for server!"
    fi
else
    echo "${IP_ADDRESS} - no server."
fi



scan_range

#!/bin/bash

set -e

source ip2int

START_ADDRESS="10.0.0.0"
NUM_OF_ADDRESSES="16777216" # 256 * 256 * 256

start_address_num=$(ip_to_int ${START_ADDRESS})
end_address_num=$(( start_address_num + NUM_OF_ADDRESSES ))

seq ${start_address_num} ${end_address_num} | parallel -P0 ./scan_ip

# This parallel call does the same as this:
#
# for ip_num in $(seq ${start_address_num} ${end_address_num}); do
#     ./scan_ip ${ip_num}
# done
#
# only a LOT faster!


Improvement from the iterative approach:

这篇关于在Bash中并行迭代IP地址的文章就介绍到这了,希望我们推荐的答案对大家有所帮助,也希望大家多多支持!

08-22 18:21