Because the company in the computer room hosting server IP is not enough, but also for security considerations, so that a number of virtual nodes can not directly access the Internet, so I xenserver physical nodes through the use of iptables NAT function made a simple implementation
[Root@xenserver-cukxsegi ~]# sysctl net.ipv4.ip_forward=1 #开启转发[Root@xenserver-cukxsegi ~]# Echo ' net.ipv4.ip_forward=1 ' >>/etc/sysctl.conf #让重启不失效[Root@xenserver-cukxsegi ~]# iptables-p FORWARD DROP #将FORWARD链的策略
Reference Address: http://www.nat123.com/Pages_8_266.jspThe methods in this article are as follows:(1) Install and enable nat123 on the intranet, add mappings, and use other app types. Intranet address port is the LAN MSSQL address port, the network address port customization.(2) After the mapping succeeds, the external network access connection MSSQL uses the mapped extranet address domain name port. Note
A simple introduction of squid
Through Squid Proxy server to achieve intranet users to share the Internet, configure Squid cache and basic access control to accelerate and restrict access to Web services.
For web users, squid is a high-performance proxy caching server that speeds up the intranet browsing the Internet and increases the client's access hit rate. Squid not only supports HTTP protocol, but al
Objective:Sometimes we want to access the local area network SQL Server server, such as test environment database in the company intranet, back home or at the customer site to connect to the database in the intranetThe first step: if you can connect to the local area network database 192.168.150.129, remote also can connect itThe second step: Add a TCP port in the intranet pangolin, the IP of the local IP,
Bkjia.com exclusive Article] Speaking of enterprise network security protection, Internet security technology is mature, such as some firewalls, vulnerability scans, and intrusion detection have been well developed. Many enterprises have emphasized the deployment of Internet security products while ignoring the threat of Intranet security. In many cases, the real threat comes from the internal, and many confidential information leaks are caused by poo
In recent years, network security has become the core content of enterprise network deployment. Intranet is a major component of network applications, and its security has been paid more and more attention. According to incomplete statistics, 15% of the investment in building an intranet outside China is used to enhance the network security of the Intranet. Secur
Figure text: udb311 topic: MSSQL Intranet penetration case analysis published: Black and White Front Line Description: it has always been mysterious to the Intranet penetration technology, and a webshell is an intranet server. I would like to take this opportunity to practice the Intranet intrusion penetration technolo
The current work environment cannot be connected to the Internet, but there are some wireless hotspots around, use a laptop to connect to the wireless network, you can access the Internet, but if you connect to the Intranet, you can not connect to the Internet, this is very troublesome, so I try to find some ways to solve this problem, so that the Intranet and the Internet can be connected at the same time
I once saw an article on the Internet that introduced a method for direct access to the intranet. In fact, we only need to use the port ing tool to easily penetrate the intranet. Port ER is a tool like this. it is even more worth mentioning that it breaks away from the command line mode and provides a graphic interface operating environment. I. basic ideas
I once saw an article on the Internet that introduc
The existing server can access both inside and outside the network, can also be accessed by the extranet, binding the domain name. Intranet has a Web site to allow users to access the network (assuming the user killed without a VPN), as follows.
Intranet site address such ashttp://192.168.1.2/index.phpWhen an extranet user accesses my server http://mydomain.me/index.php , they can see and operate the same
"Three-Point Technology and seven-point management" is a famous saying in the Intranet security field. Large enterprises and organizations, small to each of us, are dealing with management all the time. outstanding management is the starting point of enterprise competition and a necessary choice for enterprise success, this has become the consensus of the industry.
With the further development of office information technology, enterprises have establi
Firewalls and switches are still commonly used. What will happen to the cooperation between the two? I would like to share it with you here and hope it will be useful to you. With the maturity and rapid development of network and Internet technologies, more and more enterprises and institutions have begun to set up networks to automate office work and share Internet information. However, security issues have also emerged. iMaxNetworks (memory network company) proposed a solution based on the cha
Public network IP and intranet IPFirst, let's take a look at the IP address Division:Class A address:0.0.0.0------127.255.255.255Where 127.255.255.255 is the broadcast address and cannot be assignedClass B Address:128.0.0.0------191.255.255.255Class C Address:192.0.0.0------223.255.255.255Class D Address:224.0.0.0-----239.255.255.255Class E Address:240.0.0.0------255.255.255If you want to see how much IP you have on your machine, you can view it like
NAT analysis (intranet users access the server through domain names) 1. environment hypothesis: the private network address of the Intranet server is 192.168.2.20., port 80 of the server is mapped to port 80 of port 202.101.1.1, and the domain name www.sina.com is applied. The IP address of the Intranet PC is 192.168.2.2, now we configure the following command on
Sandbox), also known as Sandbox, is one of the most widely used technologies in the information security field in recent years. Google Chrome and MS Office2010 all use sandbox technology to improve their security. In the current IT field, Sandbox technology is widely used in the anti-virus software industry. For example, IT is used for virus experiments and various sandbox Security modes in user applications.
So what is sandbox technology? Simply put, sandbox is an "environment" that provides a
Duang~~~ has industry insiders, peanut shell intranet version will be online more than a router? If the message is true, then the user with the intranet IP address can be completely through the router settings to solve the remote access and management problems.Is the message true?According to small understanding, early in 2013, the peanut shell has been resolved in the
Refer to http://www.centoscn.com/CentosServer/dns/2014/0113/2355.html keepalive high-availability modeThis scheme is only suitable for small businesses, in the case of low-scale use, the resolution of a large amount of time or bind the best.If you add Local intranet own domain name hijacking resolution, simply add the parse record in the installed DNSMASQ/etc/hosts and restart DNSMASQ to take effect.Common Enterprise IT Support "5,
Today, under the Linux server encountered a strange problem: The network domain name ping results and nslookup results inconsistent, the resolution process is recorded as follows.
Confirm that the/etc/resolv.conf configuration is correct: no problem;
Confirm if additional domain name is added in/etc/hosts: no problem;
Confirm the correct IP address in the domain name server, and colleagues confirm that the intranet domain name has bee
#author: orangleliudate:2014-11-12#python2.7.xip_scaner.py ' different platforms, The implementation of IP scanning on the intranet side sometimes needs to know the valid IP of the local area network, but does not want to find a specific tool to scan. How to use pythonip_scaner.py192.168.1.1 (will scan 192.168.1.1-255 IP) ' Importplatformimport sysimportosimporttimeimportthreaddefget_os (): " getos type ' os= Platform.system () ifos== "Windows": retu
On a Linux server or on a Windows server, You can use this command to create a Web service that can be accessed quickly in the intranet, as long as you install Python. In the directory where you want to build the Web service, use the python3.x built-in method:Python-m Http.server 80008000 is the port number of the link, so that the local in the browser can access the directory through http://localhost:8000, and the LAN, such as other computers, can b
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