A. Test topology:
Two. Basic ideas and written questions:
A. Basic ideas:
By using the NAT extendable parameter, an internal address can be assigned to a different address NAT at different interfaces, or an internal address can only be matched with a static NAT once.
B. Written questions:
An internal DNS server requires a
Cisco router ip nat command ip natip nat inside destination ip nat inside source list ip nat inside source static ip nat outside source list ip nat outside source static ip nat pool ip
Recently in learning Hadoop, start making a cluster. Since the IP address of each node needs to remain constant, I decided to use NAT mode networking in VMware.However, when installing the Ubuntu system, I was prompted that the DHCP service was not turned on.Your Network is a probably not using the DHCP protocol. Alternatively, the DHCP server may be slow or some network hardware are not working properly.As a novice, only know the difference between b
Understand Cisco NATA lot of things have happened to configure a NAT.1. Inside and OutsideMany people who have configured NAT in Cisco have a question, that is, the difference between inside and outside! The following describes the NAT execution sequence in the Cisco official documentation:Note the red and blue circles. For inside-outside,
Common IP nat command syntax: ip nat {inside | outside} no ip nat {inside | outside} this command is used to set the Intranet and Internet interfaces of NAT. Use the no option to stop the interface from applying NAT. Parameter: inside: indicates that the interface connects t
Linux 2.4 Nat howto Simplified Chinese version
Rusty Russell, mailing list netfilter@lists.samba.org$ Revision: 1.3 $ Date: 2002/06/05 13:21:56 $Simplified Chinese: Foreign ghost netsnakeThanks to the traditional Chinese netmanforever@yahoo.comThis document describes how to perform camouflage, transparent proxy, port forwarding, and Network Address Translation Based on other types of Linux 2.4 kernel ).
1. Introduction
2. Official Si
Linux 2.4 Nat howto Simplified Chinese versionRusty Russell, mailing list netfilter@lists.samba.org$ Revision: 1.3 $ Date: 2002/06/05 13:21:56 $Simplified Chinese: Foreign ghost netsnakeThanks to the traditional Chinese netmanforever@yahoo.comThis document describes how to perform camouflage, transparent proxy, port forwarding, and other types of network address translation (Network
Address translations ).1. Introduction2. Official Site and list2.1 Wh
How can I allow idtcpserver idtcpclient applications to penetrate NAT? Delphi/Windows SDK/API
Http://www.delphi2007.net/DelphiNetwork/html/delphi_20061217114600108.html
Idtcpserver has a public IP address and an open port,
The idtcpclient is located after Nat and cannot be mapped to a port,
However, the idtcpclient initiates a connection and then transmits files to each other.
Could you tell me whether suc
Abstract: P2P (Peer-to-Peer) communication has developed rapidly and has a great impact. Like traditional communication, P2P communication is also restricted by the NAT/FW traversal problem. Therefore, it is very important to solve the NAT/FW traversal problem. Compared with traditional communication, NAT/FW traversal in P2P communication has many unique issues a
NAT basic IP address conversion PrincipleIn general, the NAT address translation process is the conversion process between the "local address" and "Global Address", whether the packets are sent from the internal network to the external network, or from the external network to the internal network. The difference is that the network corresponding to the local address and global address is different, and the
Nat
Complete analysis and UDP penetration Solution
I. Basic Terms
FirewallThe firewall limits the communication between the private network and the public network. It mainly discards the packets that are considered unauthorized by the firewall. The firewall only checks the data of the packets, the IP address and TCP/UDP port information in the data packet are not modified.
Network Address Translation (NAT)
Original translated from: http://blog.csdn.net/colinchan/archive/2006/05/08/712773.aspx
I. Basic Terms
Firewall
The firewall limits the communication between the private network and the public network. It mainly discards the packets that are considered unauthorized by the firewall. The firewall only checks the data of the packets, the IP address and TCP/UDP port information in the data packet are not modified.
Network Address Translation (NAT
access external networks. 1.1.2 about Nat
Nat stands for "Network Address Translation", which means "Network Address Translation". It is an IETF (Internet Engineering Task Force, Internet Engineering Task Group) standard, allows an entire organization to appear on the Internet with a public IP address (Internet Protocol. As the name suggests, it is a technology that translates an internal private network a
Write before Forwarding:All along, I have always had a doubt, when snat, if two intranet hosts happen to use the same source port number what should I do? My own guess is to get rid of a port number, map ports together (and, of course, another idea is to broadcast the package to two hosts at the same time, but this will cause security problems, to leave the hacker convenient, pass). Then the question came, if a particular service, the two sides agreed to the respective port number, the peer serv
Note: This article is good. The previous section describes some basic Nat knowledge. The subsequent sections clearly illustrate the principle of UDP Nat penetration. Let's take a look at this article first.
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Nat
Complete analysis and UDP penet
http://blog.csdn.net/ronmy/article/details/6403051
One: Basic terminology FirewallsThe firewall restricts the communication between private network and public network, it mainly considers the unauthorized packets discarded, the firewall only verifies the packet data, does not modify the IP address and TCP/UDP port information in the packet.Network Address Translation (NAT)When a packet is passed, the network address translator not only checks the pa
Due to historical reasons, one of the problems with deploying L2 Tunneling Protocol (L2TP/IPSec) with Internet Protocol Security is that the IPsec dialogs after Network Address Translation (NAT) cannot be located. Internet service providers and small office/Home Office (SOHO) networks usually use NAT to share a single public IP address. Although Nat helps to save
effectively leverages the user's external address to improve the ability to access the external network. 1.1.2 about NAT
Nat English full name is "network address translation", the Chinese meaning is "the net addresses translates", it is an IETF (Internet Engineering Task Force, Internet Engineering Tasks Group) standard, Allows a whole organization to appear on the internet with a public IP (Internet Prot
Firewallnat
In fact, the essence of the light-mouth board is equivalent to NAT device. To achieve NAT penetration, there is no problem with the SIP processing of the optical orifice plate.
Firewall is a passive network security defense technology, located at the boundary of the network, executing the access control policy between the two networks, preventing the external network from illegally accessing th
First, we will introduce some basic concepts:NAT (Network AddressNetwork Address Translation: Network Address Translation is generated when IP addresses are increasingly lacking. Its main purpose is to reuse addresses. Nat is divided into two categories: Basic Nat andAddress/port translator ).Nat is a functional module running on a vro.
The first solution is the
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