代理切换工具proxychains
背景
工作中总会遇到通过代理去访问某些资源的需求，对方提供的代理协议有些是http，socks5,socks4等等，而我们在实施过程中通过命令去走代理进行临时访问
1.比如内网服务器通过代理访问公网资源。
2.比如做一些网络穿透的时候，通过代理的方式，去扫描或者攻击目标靶机。
3.比如国外资源国内下载速度慢亦或无法访问。
.......
proxychains作为代理切换工具，就是不错的选择
部署
git直接获取
git clone https://github.com/rofl0r/proxychains-ng
页面下载
https://github.com/rofl0r/proxychains-ng/releases
目前看到最新的是4.17
http://ftp.barfooze.de/pub/sabotage/tarballs/proxychains-ng-4.17.tar.xz
安装
./configure --prefix=/usr --sysconfdir=/etc
make && make install
# 安装proxychains.conf配置文件
make install-config
配置文件
# proxychains.conf VER 4.x
#
# HTTP, SOCKS4a, SOCKS5 tunneling proxifier with DNS.
# The option below identifies how the ProxyList is treated.
# only one option should be uncommented at time,
# otherwise the last appearing option will be accepted
#
#dynamic_chain
#动态模式，连接将按照代理列表中的顺序进行，但允许跳过不可用的代理。
# Dynamic - Each connection will be done via chained proxies
# all proxies chained in the order as they appear in the list
# at least one proxy must be online to play in chain
# (dead proxies are skipped)
# otherwise EINTR is returned to the app
#
strict_chain
#严格模式，所有连接都必须通过代理链中列出的所有代理服务器，如果一个代理不可用，则整个连接将失败。
# Strict - Each connection will be done via chained proxies
# all proxies chained in the order as they appear in the list
# all proxies must be online to play in chain
# otherwise EINTR is returned to the app
#
#round_robin_chain
#轮询模式，连接将按照代理列表中的顺序进行，但会循环使用代理链，直到找到可用的代理。
# Round Robin - Each connection will be done via chained proxies
# of chain_len length
# all proxies chained in the order as they appear in the list
# at least one proxy must be online to play in chain
# (dead proxies are skipped).
# the start of the current proxy chain is the proxy after the last
# proxy in the previously invoked proxy chain.
# if the end of the proxy chain is reached while looking for proxies
# start at the beginning again.
# otherwise EINTR is returned to the app
# These semantics are not guaranteed in a multithreaded environment.
#
#random_chain
#随机模式，每次连接都会随机选择一个代理（或代理链）进行。
# Random - Each connection will be done via random proxy
# (or proxy chain, see chain_len) from the list.
# this option is good to test your IDS :)
# Make sense only if random_chain or round_robin_chain
#chain_len = 2
# Quiet mode (no output from library)
#quiet_mode
## Proxy DNS requests - no leak for DNS data
# (disable all of the 3 items below to not proxy your DNS requests)
# method 1. this uses the proxychains4 style method to do remote dns:
# a thread is spawned that serves DNS requests and hands down an ip
# assigned from an internal list (via remote_dns_subnet).
# this is the easiest (setup-wise) and fastest method, however on
# systems with buggy libcs and very complex software like webbrowsers
# this might not work and/or cause crashes.
proxy_dns
# method 2. use the old proxyresolv script to proxy DNS requests
# in proxychains 3.1 style. requires `proxyresolv` in $PATH
# plus a dynamically linked `dig` binary.
# this is a lot slower than `proxy_dns`, doesn't support .onion URLs,
# but might be more compatible with complex software like webbrowsers.
#proxy_dns_old
# method 3. use proxychains4-daemon process to serve remote DNS requests.
# this is similar to the threaded `proxy_dns` method, however it requires
# that proxychains4-daemon is already running on the specified address.
# on the plus side it doesn't do malloc/threads so it should be quite
# compatible with complex, async-unsafe software.
# note that if you don't start proxychains4-daemon before using this,
# the process will simply hang.
#proxy_dns_daemon 127.0.0.1:1053
# set the class A subnet number to use for the internal remote DNS mapping
# we use the reserved 224.x.x.x range by default,
# if the proxified app does a DNS request, we will return an IP from that range.
# on further accesses to this ip we will send the saved DNS name to the proxy.
# in case some control-freak app checks the returned ip, and denies to
# connect, you can use another subnet, e.g. 10.x.x.x or 127.x.x.x.
# of course you should make sure that the proxified app does not need
# *real* access to this subnet.
# i.e. dont use the same subnet then in the localnet section
#remote_dns_subnet 127
#remote_dns_subnet 10
remote_dns_subnet 224
# Some timeouts in milliseconds
tcp_read_time_out 15000
tcp_connect_time_out 8000
### Examples for localnet exclusion
## localnet ranges will *not* use a proxy to connect.
## note that localnet works only when plain IP addresses are passed to the app,
## the hostname resolves via /etc/hosts, or proxy_dns is disabled or proxy_dns_old used.
## Exclude connections to 192.168.1.0/24 with port 80
# localnet 192.168.1.0:80/255.255.255.0
## Exclude connections to 192.168.100.0/24
# localnet 192.168.100.0/255.255.255.0
## Exclude connections to ANYwhere with port 80
# localnet 0.0.0.0:80/0.0.0.0
# localnet [::]:80/0
## RFC6890 Loopback address range
## if you enable this, you have to make sure remote_dns_subnet is not 127
## you'll need to enable it if you want to use an application that
## connects to localhost.
# localnet 127.0.0.0/255.0.0.0
# localnet ::1/128
## RFC1918 Private Address Ranges
# localnet 10.0.0.0/255.0.0.0
# localnet 172.16.0.0/255.240.0.0
# localnet 192.168.0.0/255.255.0.0
### Examples for dnat
## Trying to proxy connections to destinations which are dnatted,
## will result in proxying connections to the new given destinations.
## Whenever I connect to 1.1.1.1 on port 1234 actually connect to 1.1.1.2 on port 443
# dnat 1.1.1.1:1234 1.1.1.2:443
## Whenever I connect to 1.1.1.1 on port 443 actually connect to 1.1.1.2 on port 443
## (no need to write :443 again)
# dnat 1.1.1.2:443 1.1.1.2
## No matter what port I connect to on 1.1.1.1 port actually connect to 1.1.1.2 on port 443
# dnat 1.1.1.1 1.1.1.2:443
## Always, instead of connecting to 1.1.1.1, connect to 1.1.1.2
# dnat 1.1.1.1 1.1.1.2
# ProxyList format
# type ip port [user pass]
# (values separated by 'tab' or 'blank')
#
# only numeric ipv4 addresses are valid
#
#
# Examples:
#
# socks5 192.168.67.78 1080 lamer secret
# http 192.168.89.3 8080 justu hidden
# socks4 192.168.1.49 1080
# http 192.168.39.93 8080
#
#
# proxy types: http, socks4, socks5, raw
# * raw: The traffic is simply forwarded to the proxy without modification.
# ( auth types supported: "basic"-http "user/pass"-socks )
#
[ProxyList]
# add proxy here ...
# meanwile
# defaults set to "tor"
socks4 127.0.0.1 9050
开启代理端socks代理的两种办法：
1.通过goproxy代理服务器上开socks协议的端口：
2.通过ssh把代理服务器的socks协议开在客户端上：
ssh -CfNg -D 7777 root@{代理服务器ip}
修改配置文件
根据自己的需求，在配置文件底部输入代理地址
[ProxyList]
# add proxy here ...
# meanwile
# defaults set to "tor"
#socks4 127.0.0.1 9050
socks5 xxx.xxx.xxx.xxx 7777 #（xxx.xxx.xxx.xxx为方法一代理服务器ip或者是方法二的客户端ip）
验证
客户端
proxychains4 curl www.baidu.com
proxychains4 yum install vim
代理端
