Problem Description:
1, the PIX placed in a fixed IP environment (external network for fixed IP), and set the correct ACL allow ICMP release, this case intranet can be normal Internet access can also ping the extranet.
2, and then put the PIX in the ADSL environment (with PIX to dial), ACL or before the same, PIX under the intranet computer can only surf the internet, can not ping the extranet.
Solution:
One, the internal LAN all use the private address on the network, under the normal circumstances, the internal computer in the direct use route external access, will because the computer uses is the Internet reservation address, but is filtered by the router, thus causes cannot access the Internet resources, The solution to this problem is to use the NAT address translation function provided by the routing operating system to convert the private address of I
Firefox and Chrome support WEBRTC can request the stun server to return to the intranet IP, unlike the XMLHttpRequest request, stun request is not seen in the developer tool.
Get the IP addresses associated with a account function Getips (callback) {var ip_dups = {}; Compatibility for Firefox and chrome var rtcpeerconnection = window. rtcpeerconnection | | window.mozrtcpeerconnection | |
Window.webkitrtcpeerconnection;
var mediaconstraints
It is very convenient to develop MIS system on internet/intranet based on ASP technology, first of all, it borrows ADO technology and concept, and accesses database through ODBC, and achieves full flexibility and multi-platform, in addition, because of ASP using VBS and JS scripting language, It also ensures that most developers quickly enter the development process and reduce the learning process.
However, because the ASP is based on the Internet/
Often the company's development environment will be arranged in the intranet, and then there will be a common server for everyone to develop, test, so often there will be SSH connection server, or local MySQL client connection server needs, I personally experienced the company often occurs ssh/ MySQL connection to the public server is very slow, because the SSH service and MySQL service by default will be at the time of the DNS reverse parsing process
Tags: view NTS Basic Principles Network HTTP gateway out order principleOpen Terminal, enter the following command# View current routing tableNetstat-rn# Get the default routeRoute get 0.0. 0.0 # Delete Default routesudo route-n Delete default 10.2. 0.1 # Add a public network gateway sudo Route add-net 0.0.0.0 10.2. 0.1 # Add intranet Gateway sudo route add-net 194.0. 0.0 194.2. 100.254 After the command is entered, open the s
Intranet SecurityIn the face of threats, firewall, anti-virus software, IPS, and other products are often ineffective. These products have been widely deployed in the enterprise network, but these products are mainly for Internet security protection.CAIt is a third-party trust institution that uses the PKI public key infrastructure technology to provide network identity authentication services, is responsible for issuing and managing digital certifica
What is port ing:
Port ing (NAT or napt) refers not to a port in the physical sense, but to a port in the TCP/IP protocol. It is a logical port. Port ing: if a computer on the Intranet needs to access the Internet, port ing is required. Port ing is divided into dynamic and static. dynamic port ing: if a computer in the Intranet needs to access xinlang, it will send packets to the NAT gateway, including the
Today, we will talk about how to use port ing without using the gateway to open the Intranet.
I. Prerequisites
A public IP address is required. Assume that we have a public IP Address: 210.210.21.21.
Ii. Tools used
1.lcx.exe
2. vdic
Iii. Methods
Method 1: Use lcx.exe for ing.
(1)we will upload lcx.exe to the public IP address, and execute lcx-listen Port 1 Port 2 in the DOS environment on the public IP Address
See lcx-listen 3030 for details.
T
Immune NetworkThe solution is specialized in Intranet security management. It features both technical architecture, strategy, and feasibility to ensure stable operation of the network base. This is what all enterprise networks can use, the premise of application management. The immune network solution is not a separate product, but a complete set of components consisting of software and hardware, Intranet s
The proxy server settings have many surprising relationships with the IE region.
The Local Intranet Zone is easy to use. It allows TCP/IP to allow servers on the other side of the earth to access the same server as the server on the lower floor .. on the other hand, the question "local" is left to the user or the network administrator to answer. it is easy to guess that when the machine is a local Intranet
were opened.Consider port forwarding to log in to SSH.Three. Intranet SSH forwarding:Upload the tool to a host outside the network:Since the target host is Linux,-listen is followed by the-linux:The SSH client then remotely connects to the host's 3001 port, and the extranet host displays a connection:Then bounce ssh:Outside the network, you can see that the connection has been received:Soon, the SSH client also reacted, stating that the rebound SSH w
First, explain the concept of "intranet" and "Extranet":
Intranet: That is to say the LAN, such as the school's local area network, the local area network each computer IP address in this local area network has the mutual opposite sex, is not repeatable. But the intranet IP in two LAN can have the same.
Extranet: That is, the Internet, LAN through a server or a r
Working desktop has just been migrated to Ubuntu. It is a strange problem that Ubuntu can resolve the Internet normally, but it cannot resolve the Intranet domain name (the domain name ending with. local ). The following describes how to solve the problem. 1. Since I installed XP on Ubuntu, the Intranet domain name can be resolved through the NAT network link on XP. 2. You can use the dig command in Ubuntu
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 security factors are far more terrible than the external dangers.
Most enterprises pay attention to improving the border security of enterprise networks, but do not mention t
Terminal AuditThe real purpose is not to record all events that have occurred on the terminal for future query, but to collect evidence and analyze whether the implemented Intranet security management policies meet the security management requirements and promoteIntranet SecurityContinuous improvement.
I. Leave the terminal audit misunderstanding
An important feature of terminal audit is to backtrack historical events in the past ". For example, Can y
SSH Intranet Port Forwarding combat
Guide
As you know, SSH is a secure transport protocol that is used more on the connection server. But in fact, in addition to this feature, its tunnel forwarding function is more attractive.
If the Linux server between the two intranet needs to log in with each other, or need to access a port on the i
Firewalls and switches are still commonly used. So I studied how firewalls and switches implement Intranet/Internet isolation. Here I will share with you, hoping to help 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
as input.
Note that the this documentation, referring to an IP address as an IPv4 address or an IPV6 address was a semantic property O f the address, not just the length of the byte slice:a 16-byte slice can still is an IPv4 address.
Type IP []byte
func IPv4
Func IPv4 (A, B, C, D byte) IP
IPV4 returns the IP address (in 16-byte form) of the IPV4 address a.b.c.d.
Donuts, see the documentation for more details: https://golang.org/pkg/net What is an
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