nat for dummies

Following the previous "Juniper Old Driver Experience" (SRX Firewall optimization), Juniper old driver experience (SRX firewall NAT and strategy) The second video course was recorded on the line.1, two courses are completely independent and combined,SRX Firewall Optimization Chapter is for firewall dual-machine, configuration optimization content.The SRX Firewall NAT and policy chapter is for fire

Document directory Socket The last article is the following: Http://blog.csdn.net/cuishi0/article/details/7562010 It is basically described above. Add: Reference: I. Nat Classification According to the STUN Protocol (rfc3489), Nat is roughly divided into the following four categories:1) Full cone After machine A in Nat connects to machine C on the Internet

I. Network Address Translation NAT: Some hosts in the private network have already been assigned a local IP address, but now they want to communicate with hosts on the Internet. The simplest way is to apply for some global IP addresses, however, there are not many IPv4 addresses in the world, so network address translation is used. Install Nat software on a vro connected to the Internet by using a private n

It is still difficult for general users to implement effective Cisco router nat configuration. So I have studied the comprehensive knowledge about Cisco router nat configuration and will share it with you here, I hope it will be useful to you. 1. NAT introduction: NATNetwork Address Translation) Network Address Translation first appeared in Cisco 11.2 IOS. It is

We know the checksum problem of Linux NAT optimization. Linux NAT is a stateful NAT Based on ip_conntrack, and its configuration is similar to the effect of BSD's keep state! If you take a look at the PREROUTING of Netfilter, you will know that ip_conntrack depends on ip_defrag, that is, all the IP slices of the shard must be reorganized before they can enter ip_

In Cisco router configurations, NAT configurations are frequently used. I hope the introduction below will be helpful to the majority of fans. It is a common method. The vro performs simple NAT translation and sets a CIDR Block in the NAT address pool. After a while, I found that the address pool was a waste of time. When I wanted to use a real ip address, I coul

The original link (also reproduced) http://blog.csdn.net/yetyongjin/article/details/6881491. I have modified some typos. SIPWhat kind of problems do you encounter from the private network to the public network? 1. Address translation of the package.2. SIP address translation inside SIP messages.3. The RTP address translation in the SDP in the SIP message.The existing structure of the network is complex, SIP service providers are not necessarily network providers, it is difficult to ask customers

is retrieved, and the local cache is sent to the user. This approach reduces the load on the Web server by reducing the number of requests to the Web server.NAT TechnologyNat is the meaning of "network address Translation", which allows a whole organization to appear on the internet with a public IP address. As the name implies, it is a technology that translates the internal private network address (IP address) into a legitimate network IP address.650) this.width=650; "src=" Http://s5.51cto.co

Director of router NAT backflow analysis asked me to configure the router so that our campus can also access the home page of our school through the domain name. It turns out that our home page can be accessed out of school through a domain name, but in school It can only be accessed through an IP address. Because I did not find that the Intranet cannot be accessed when configuring NAT, this problem has not

Ip_conntrack is used to modify the application layer protocol control package, and iptables's redirect target also uses ip_conntrack. In addition, the State module of iptables is also used. ip_conntrack is used to show the importance of ip_conntrack, ip_conntrack is very important to implement Nat. It can be said that redirect target and modification to FTP, for example, are implemented to implement Nat for

Detailed description of VMware virtual network connection modes (NAT, Bridged, Host-only) and bridgedhost-onlyPreface If you use VMware to install a virtual machine, you will definitely choose a network connection. vmware provides three main network connection methods. What should we choose? What are their differences? In this article, we will go into depth. First, open the network adapter in the virtual machine settings, such: There are three types

Before talking about the VMware network model, let's talk about several VMware Virtual Devices: Vmnet0: This is the virtual switch used by VMware for virtual Bridging networks;Vmnet1: This is the virtual switch used by VMware in the Virtual Host-only network;Vmnet8: This is the virtual switch used by VMware for virtual Nat networks;VMware network adapter vmnet1: This is the virtual Nic used by the host to communicate with the host-only virtual netwo

There is a lot of information on how to configure Nat on Linux, which is overwhelming! This article has nothing to do with this. This article provides a way outside of iptables.Iptables No! Why Because the NAT configured by Iptables is stateful, its implementation relies on a module called Conntrack, what is Conntrack? Oh,no! This is my specialty, but I don't want to say it in this article, people who know

Test the NAT router, with the virtual machine, the connection to the host, and discover the details of the network implementation in VMware.Existing network structure:Virtual machines in a NAT subnetNAT-Out subnet segment is 192.168.222.0/24Virtual machine A has a NAT connection to the network with an IP address of 192.168.222.146, the network is managed by a

What are the problems with SIP from private network to public network? Address translation of the package. SIP address Translation inside the SIP message. The RTP address translation in the SDP inside the SIP message. The existing structure of the network is complex, SIP service providers are not necessarily network providers, it is difficult to ask customers to use only some way of natfirewall. How to find a SIP application solution that can meet a variety of networks. Fundamentals of

Tags: note conversion parameters span Lin ... Different virtual multipleOne, virtual machine NAT mode principleNat mode is also called VMnet8 under VMware. In this mode, the host has two network cards, a real physical network card (that is, NAT device), connected to network; a VMware network Adapter VMnet8 that communicates with the virtual machine NIC through a virtual switch (VMNET8).Because

Demonstration: Dynamic NAT for Network Address Translation Join the group for technical exchange and Q amp; A: 1952289 Demonstration objectives:Use Dynamic NAT to translate private network addresses. Demo environment:As shown in figure 9.63. 650) this. width = 650; "src =" http://www.bkjia.com/uploads/allimg/131227/1610451313-0.png "title =" 1.png" alt = "221105645.png"/> Demonstration Background:This

stun, turn, Ice Protocol overview Stun,turn,ice is a protocol group proposed by IETF to deal with Nat crossing problem in VoIP network. Stun can handle most NAT problems, turn is an enhanced version of the stun protocol, designed to deal with symmetric NAT problems, while ice is the product of comprehensive stun and turn, a framework for combining stun and turn

http://blog.csdn.net/noiile/article/details/115436 What are the problems with SIP from private network to public network? Address translation of the package. SIP address Translation inside the SIP message. The RTP address translation in the SDP inside the SIP message. The existing structure of the network is complex, SIP service providers are not necessarily network providers, it is difficult to ask customers to use only some way of natfirewall. How to find a SIP application solution that can

This article describes how the IP address is about to run out, how the PAT technology solves such problems, and how to compare the differences between NAT and PAT. I believe this article will help you. Ip address depletion facilitates the development of CIDR, but the main purpose of CIDR development is to effectively use the existing internet address, and according to RFC1631 (ip network address translator) developed