In the development, sometimes we need to send remotely, or through 3G and 4G, or other WiFi environment to send a small amount of data, and do not want to spend so much cost to develop a cloud server, this time the emergence of a router to expose an intranet IP for external network access. In fact, the implementation name of this method is called port mapping .
Next we implement this way ready you want to expose the
Intranet Security Status Quo Analysis
The theory of Intranet security is relative to the traditional network security. In the traditional network security threat model, it is assumed that all the personnel and devices in the Intranet are secure and trusted, while the external network is insecure. Based on this assumption, Internet security solutions such as anti-
Most enterprises pay attention to improving the border security of enterprise networks, but do not mention their investment in this area, but the core intranet of most enterprise networks is still very fragile. Enterprises have also implemented corresponding protection measures for internal networks, such as installing network firewalls and intrusion detection software that may easily reach tens of thousands or even hundreds of thousands. They also ho
Almost all enterprises have paid more attention to network security. They have successively purchased firewalls and other devices to block security factors from the Internet. However, Intranet attacks and intrusions are still rampant. Facts have proved that the company's internal insecurity is far more terrible than the external harm.
Most enterprises pay attention to improving the border security of enterprise networks, but do not mention their inves
Front-facing conditionsTo achieve the purpose: to develop the local computer needs to connect with no network address of the RDS, through the ECS forwarding connection to the RDS databaseClient PC terminal can SSH login to the ECS server with public network.ECS servers with a public network can access other intranet ECS servers through the intranet.ECS Server with public network can access RDS via intranet
Intranet Infiltration some commands to collect and organize
=====
Some command to gather information
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@ Query Some of the circumstances of this machine
Ipconfig/all
@ Query machines with relationships
Net View
@ Query has several fields
Nei view/damin
@ View the list of computers in the TestDomain domain
NET View/domain:testdomain
@ query groups within a field
NET Group/domain
@ Divide Network Segment
dsquery subnet
@ query users in the domain
N
Many programs in the local area network can be applicable, but between the external network and intranet and between intranet and intranet is not feasible. The problem is NAT, this article will introduce the next 5 Nat penetration method, solve the internal and external network exchange. 1. Fully conical (full Cone) NAT
Host A and Host B in different
The author of the school through ADSL set up routes to share the Internet. The extranet gateway and DNS are 10.0.0.138, the external network port IP address is 10.0 0.1, and the subnet mask is 255.255.255.0. Self-built sites are placed on the server, on the server has been
IIS is installed and set up, and the "Default Web site" IP address points to 10.0.0.1.
In the default state, you can access the extranet, but you cannot access the intranet. If yo
(This article was previously reproduced on the Internet and has been modified. I will repeat it after my operations)
In the past, I installed a dual Nic on my computer (not a server) to facilitate the test. The dual Nic accesses two different networks but can access the Internet. Recently, in order to build and test a VPN, I connected one of the NICS to a small Intranet (that is, they cannot access the internet). Now I have a problem: I can only acces
I. Overview of the Intranet/Internet platform
, The dotted line below is the Internet, which provides Web Services, DB services, DNS services, exchange services, and so on; The above is the Intranet, which provides services similar to the Internet. This article focuses on the mail system under this structure.
Ii. Architecture of email on the Intranet platf
Relatively speaking, there is little information on the Internet, and few people write some detailed information about the Intranet penetration for the reference of their peers. Today, I am only going to give a general introduction to some Intranet knowledge.
First, under what circumstances will we meet the Intranet? If your goal is only limited to a small web, y
Enterprise Intranet security product selection Source: Network Author: Network Release Date: In recent years, security issues have become increasingly prominent in the internal network (terminal), and security events have frequently occurred. Data shows that manufacturing enterprises are also faced with problems such as data leakage, lack of confidentiality, and poor monitoring. How can we select a suitable Intran
First, peanut shell installation (before installation needs in the Peanut Shell website registration to get a free domain name, with this domain name, behind the outside network through access to this domain name to achieve SSH login Intranet Linux host)[[email protected] desktop]# wget http://download.oray.com/peanuthull/linux/phddns-2.0.6.el6.x86_64.rpm--2014-10-27 20:11:30--http://download.oray.com/peanuthull/linux/phddns-2.0.6.el6.x86_64.rpmParsin
regional molecular network, that is, the IP phase is different when the subnet mask is not the same.
Add to
Using Command 2
Route Add-p Network Address mask Subnet Mask gateway address
You can add a route that you add to your path in a permanent route (also known as a static route)
Use the command effect chart as follows:
Delete
Using Command 3
Rotue Delete network Address
You can delete a route
In general, the system will automatically add a static route to all the networ
Apt Local source build (can be used for LAN Apt-get source or local source) This document describes the use of Apt-mirror software to build apt local source requirements: Intranet development environment for its specific reasons can not Sisu network, So we need the local intranet source to make it easy for developers to download and install software recommendations: Use a single disk to store source files o
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,
Intranet security management products must be intercepted with ARP Spoofing with caution. With the continuous popularity of Intranet security management products in the market, there are many product patterns with various ideas, but the trend of product homogeneity is obvious, in particular, for terminals to block illegal access to the Intranet, the method is gen
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