Cost-effective overseas VPS brand Vultr VPS announces a new feature called "Reserved IPs", as the name implies to help you keep the server IP address for later use.This requirement is because users often create new, delete a VPS server, the default is assigned to the random server IP address. If you are in the company of a certain size of server cluster, you prefer to keep the original IP address unchanged, saving time to modify the configuration.Usin
using the Uniq command, you can filter out duplicate lines in a text file, statistics, and so on, and it also accepts input from the pipeline. With awk, you can even manipulate columns in rows, such as counting the number of independent IPs in Nginx log messages, listing the most visited IPs, and so on. It is important to note that Uniq only handles connected rows, so the sort operation is generally done fi
When using Python Crawlers, we sometimes use IP proxies. Inadvertently found a free proxy IP site:http://www.xicidaili.com/nn/. However, the discovery of a lot of IP is not used. Therefore , a script is written in Python, which can detect the proxy IP that can be used . The script is as follows:#encoding =utf8import urllib2from bs4 import beautifulsoupimport urllibimport socketuser_agent = ' mozilla/5.0 (Windows NT 6.3; WOW64; rv:43.0) gecko/20100101 firefox/43.0 ' header = {}header[' user-agen
Security Managers face many challenges in protecting enterprise network servers from attacks. Although the Intrusion Detection System (IDS) was once widely used, the attack methods on the Internet are constantly being improved. At the same time, the signature technology IDS cannot detect new and deformation attacks, therefore, traditional IDS gradually show their limitations in terms of initiative.
So what are the choices for enterprises? Intrusion Protection System (
: ' {print '} ' |sort |uniq-c | sort-n-R#tcpdump Crawl 100 packets, access to the local 80 IP for reordering only show the first 20, these IP is the attack source IP, we need to seal it offTCPDUMP-TNN DST Port 80-c 100 | Awk-f "." ' {print $ '. $ "." $ "." $4} ' | Sort | uniq-c | Sort-n-R |head-20#新建一个setname. txt files, add these IPs in the following format (how many IPs are the number of lines)Vim setname
PHP Gets the Remote Web page content function when the same domain name corresponds to multiple IPs
The FGC is simply read and encapsulates everything.
Fopen also carries out some encapsulation, but requires you to iterate through all the data.
Fsockopen This is the socket operation of the straight plate.
If you just read an HTML page, FGC is better.
If the company is online through a firewall, the general file_get_content function will not be. Of cou
Solution 1:cat Access_log | awk ' {print '} ' | Sort | uniq-c | Sort-n-R | HEAD-10 Solution 2:cat Access_log | Awk-f "--" ' {print $} ' | Sort-t. | uniq-c | Sort-n-R | Head-10awk ' {a[$1] + = 1;} END {for (I in a) printf ("%d%s\n", a[i], i);} ' log file | Sort-n | TailFirst, you use awk to get a list, then sort it out, and finally use tail to take the last 10.The above parameters can be slightly modified to display more data, such as the tail plus-n parameters, and other log format commands may
ObjectiveTake the recent discovery of a free proxy IP site for example: http://www.xicidaili.com/nn/. In the use of the time to find a lot of IP is not used.So I wrote a script in Python that could detect the proxy IP that could be used.1 #Encoding=utf82 ImportUrllib23 fromBs4ImportBeautifulSoup4 ImportUrllib5 ImportSocket6 7User_agent ='mozilla/5.0 (Windows NT 6.3; WOW64; rv:43.0) gecko/20100101 firefox/43.0'8Header = {}9header['user-agent'] =user_agentTen One " " A get all proxy IP addre
number of available IPs that are currently found4Okipnum =05 forProxyinchproxies:6 #random use of different useragent7UserList =useragentlist.userlist8headers = {'user-agent': Userlist[random.randint (0, Len (userlist)-1)]}9 #request is sent with a different useragent, with a test IP proxyTen #If there is an exception, skip directly, there may be a connection to the supermarket anomalies, etc. One Try: AText_web = Requests.get ("http
/*************************function Purpose: Gets the Remote Web page content of the specified server when the same domain name corresponds to multiple IPs* Date Created: 2008-12-09* Created by: Zhang Yi (img.jb51.net)* Parameter Description:* $ip The IP address of the server* The host name of the $host server* The URL address of the $url server (excluding domain name)* Return value:* Access to the Remote Web page content* False access to Remote Web pa
Method 1: A small number of IPs are manually bound:(here to bind IP to eth0 for example, the other network adapter words to modify the corresponding file name can be)1. Copy the Ifcfg-eth0 network adapter profile and rename it to ifcfg-eth0:0[[email protected]/]# cd/etc/sysconfig/network-cp ifcfg-eth0 ifcfg-eth0:02. Edit the ifcfg-eth0:0 file[Email protected]/]# Vim/etc/sysconfig/network-scripts/ifcfg-eth0:0DEVICE= "Eth0:0″// change here to eth0:0 wit
Ext.: http://blog.csdn.net/turkeyzhou/article/details/16971225Configure NIC IP aliases under Linux what is an IP alias?In the words of Windows, you configure multiple IPs for a network card.What is the occasion to add IP aliases?Web needs, multi-IP access testing, specific software for multiple IP needs ... and so on.Here are a few examples of how to use the Ifconfig command to configure an IP alias for a network card.First, configure a static IP addr
SSH connection after login:Entercd/etc/sysconfig/network-scriptsgenerally the first is the system default IP edit file. Some systems will have multiple connections, X36 on the new VPS, there will be 4 connections, that is, there are 5 files beginning with ifcfg, Ifcfg-lo is the loopback port. Preferably vi into the file editor, to see which file has the initial default IP, in the file modification! VI ifcfg-7i24nicEnter the configuration fileNew IP configuration command:ipaddr2=103.255.177.88pre
Because the author recently encountered such a situation, the number of servers to do networking planning, the client side gives a limited amount of IP,Not enough for each host to be assigned to IP, but I think again, not necessarily every service must use the DCN network address,So I think I can configure the network card that must use the DCN network address two IP, a DCN network address, a private IP address we define ourselvesThe author takes the operating system under VMware Virtual machine
Recently do the system performance optimization encountered a problem, after the solution to share to everyone.When we establish a connection through the socket, if our computer cannot connect with the specified site, then this will cause the system to be stuck on the socket connect method,We all know that the socket to establish a connection requires three handshake, the computer sends a message header to the server, the server returns, this time the socket basic connection is successful, but i
1. Test topology:
Note: The TCP Reset command cannot be issued from the original sensor port of the IPs because of the constraints of the simulated environment, so the test emits a TCP reset with the IPs other interfaces.
2. Basic configuration:
R1:
Interface fastethernet1/0
IP address 10.1.1.1 255.255.255.0
No shut
R2:
Interface fastethernet1/0
IP address 10.1.1.2 255.255.255.0
No shut
R3:
R3
=ethernetOnboot=yes
Two, a single network adapter to bind multiple IPsSometimes we need to configure multiple IPs on a NIC, for example, in the example above, we also need to configure IP 192.168.168.2 and 192.168.168.3 for eth0. Then you need to create a new two configuration file under/etc/sysconfig/network-scripts:ifcfg-eth0:0 content is as follows:
device=eth0:0Bootproto=staticipaddr=192.168.168.2netmask=255.255.255.0Onboot=yes
Preface: Two scripts, the implementation of multiple addresses are not contiguous IP ping test, the function of two scripts is the same, the script is as follows:First script:#!/bin/bashCat Iplist|while Read Line #iplist是存放IP的文档, with a script placed in a path, formatted with one IP address per rowDoPING-C2 $line >/dev/nullIf [$? = 0]Thenecho "$line is up!"Elseecho "$line is down"FiDoneA second script:#!/bin/bash#check PingFor IP in ' cat iplist ' #iplist为写IP地址的文件, format each line with an IP ad
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