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一般查找域名对应的IP，可以用这个命令 nslookup <域名>，但这样找，返回的ip比较少，今天看到一条命令，可以批量查找Google当前的IP范围。

命令及返回的结果如下：

# nslookup -q=TXT _netblocks.google.com 8.8.8.8
Server:         8.8.8.8
Address:        8.8.8.8#53

Non-authoritative answer:
_netblocks.google.com   text = "v=spf1 ip4:64.18.0.0/20 ip4:64.233.160.0/19 ip4:66.102.0.0/20 ip4:66.249.80.0/20 ip4:72.14.192.0/18 ip4:74.125.0.0/16 ip4:108.177.8.0/21 ip4:173.194.0.0/16 ip4:207.126.144.0/20 ip4:209.85.128.0/17 ip4:216.58.192.0/19 ip4:216.239.32.0/19 ~all"

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#include <execinfo.h>	// for backtrace
#include <dlfcn.h>		// for dladdr
#include <cxxabi.h>		// for __cxa_demangle

#include <cstdio>
#include <cstdlib>
#include <string>
#include <sstream>

// This function produces a stack backtrace with demangled function & method names.

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#!/usr/bin/awk -f

# #
# 
# Inspired by http://www.percona.com/doc/percona-toolkit/2.1/pt-tcp-model.html
# 
# Example usage: 
# $ tcpdump -i any -s 0 -nnq -tt  'tcp port 80 and (((ip[2:2] - ((ip[0]&0xf)<<2))  - ((tcp[12]&0xf0)>>2)) != 0)'
# 1349692787.492311 IP X.X.X.X.XXXX > X.X.X.X.XXXX: tcp 1448
# $ ./requestor.awk dump.file

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cd /opt
wget https://github.com/jgmdev/ddos-deflate/archive/master.zip
unzip master.zip
rm master.zip
cd ddos-deflate-master
./install.sh


echo '# Paths of the script and other files
PROGDIR="/usr/local/ddos"

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#!/bin/bash

# domainavailable
#   Fast, domain name checker to use from the shell
#   Use globs for real fun:
#     domainavailable blah{1..3}.{com,net,org,co.uk}
# Inspired by foca / giles:
#   http://gilesbowkett.blogspot.com/2009/02/simple-bash-domain-availability.html

trap 'exit 1' INT TERM EXIT

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#
# The following script will
#   - Create Linux bridge $BR_WAN, $BR_LAN
#   - Install IP addresses and basic routes
#   - Enable proxy_arp on $BR_WAN
#   - Enable ip_forward
#   - Enable MASQUERADE on $IF_INET

# - $BR_LAN, $BR_WAN has to be allowed in ~/.usr/etc/qemu/bridge.conf
#

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#!/bin/bash
set -e
DEFAULT_PACKAGES=ssh,language-pack-en-base
DEFAULT_COMPONENTS=main,universe
DEBOOTSTRAP=/usr/sbin/debootstrap
DEFAULT_MIRROR=http://archive.ubuntu.com/ubuntu
DEFAULT_VARIANT=minbase

MIRROR=${STRAP_MIRROR:-$DEFAULT_MIRROR}
ROOTFS=$1

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pip uninstall -y rtslib-fb==2.1.49
sudo apt-get remove -y lio-utils
sudo apt-get install -y python-prettytable python-ipaddr python-netifaces python-configobj python-pyparsing python-epydoc texlive-latex-base texlive-latex-extra texlive-latex-recommended lmodern texlive-fonts-recommended python-urwid

rm -rf rtslib
git clone https://github.com/Datera/rtslib
cd rtslib; make deb; sudo apt-get -y remove rtslib ; dpkg -i dist/*.deb; cd ..

rm -rf configshell
git clone https://github.com/Datera/configshell

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#~/.mutt/aliases
alias nick		Nicholas Levandoski	<[email protected]>
alias tim		Timothy Pitt		<[email protected]>
alias steven		Steven Jackson		<[email protected]>
alias kaleb		Kaleb Hornsby		<[email protected]>
alias alug-admin	nick, tim, steven

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	resolver 8.8.8.8;
	location /video/ {
                if ($request_uri ~ "^/video/(.+?)/.+") {
                        set $upstream_host $1.googlevideo.com;
                        add_header Content-Disposition "attachment; filename=video.mp4;";
                }
                rewrite /video/.+?/(.+)$ /$1 break;
                proxy_buffering off;
                proxy_pass https://$upstream_host;
                proxy_set_header Host $upstream_host;