nat for dummies

Sip nat/FW Default font9pt10pt11pt12pt13pt14pt15pt16pt17pt18pt20pt25pt30pt35pt40pt45pt50pt Basic Principles of NAT and FirewallFirst, there are several Nat methods: Full Cone: when a private network host sends a packet to the public network, its local address and port are {A: B}, Nat will set its private address {:

If you look at the help of iproute2, you will find that there is a NAT action in the route section, where the via Parameter provides the conversion address. I will not mention the specific configuration. I only propose two points. First, the stateless Nat of iproute2 requires the participation of policy routing. Second, it is removed from the 2.6 kernel. For more information, see the documentation. In the 2

1. NAT Overview NATNetwork Address Translation) the network Address Translation function is to convert an illegal IP Address defined within the enterprise to a legal IP Address recognized on the Internet. Due to the limitation of IPv4, the Internet is facing a shortage of IP address space. It is unrealistic to apply from the ISP and assign a valid IP address to each employee of the enterprise. NAT can effec

can access the virtual machine through 192.168.1.98, if the virtual machine needs to Sisu network, then also need to configure the virtual machine routing address , is 192.168.1.1, so that the virtual machine can be Sisu network, but, the internet we generally go through the domain name to access the external network, so we also need to configure a DNS server for the virtual machine, we can simply point, the DNS server address is configured as Google's DNS server : 8.8.8.8, the virtual machine

people can access the virtual machine through the 192.168.1.98, if the virtual machine needs Sisu Network, then also need to configure the virtual machine routing address, is 192.168.1.1, so that the virtual machine can sisu network, but, the internet we generally go through the domain name to access the external network, so we also need to set up a virtual machine Set up a DNS server, we can simply point to the DNS server address configured as Google's DNS server: 8.8.8.8, the virtual machine

VMware has host-only (host mode), NAT (network address translation mode), and bridged (bridge mode) three modes of operation.1.bridged (bridging mode) In such a mode. VMware's virtual operating system is like a standalone host on a local area network that can access any machine in the network.In bridging mode, you need to manually configure the virtual system with an IP address, subnet mask, and the same network segment as the host machine, so that

With the rapid development of the Internet, the shortage of IP addresses has become a very prominent problem. For example, in my organization, 200 computers and 4 servers, only 6 class C addresses are allocated. So how can we solve this problem? I chose to implement NAT on the vro to solve this problem. NAT (NetworkAddressTranslation) is the network IP address. With the rapid development of the Internet, th

In Linux, configure the NAT server to share the Internet content: 0. topology of the network configured in this configuration: 1. configure the IP address. 1.1 correctly configure the IP address allocated by the school to enable normal Internet access. 1.2 add the eth0 alias device eth0: 0.1.3 and check the configuration... in Linux, configure the NAT server to share the Internet content: 0. topology of the

NAT (Network address translation): Works at the network layer and forwards the packets after the address is translated. Solve the network address is not enough, by hiding the local IP address to protect the network security.NAT Router (the router that needs to load the NAT software), at least one valid external global IP address, All local address hosts (local IP addresses for all hosts in LAN 192.168.0.0)

Experimental topology650) this.width=650; "src=" http://s3.51cto.com/wyfs02/M02/6F/92/wKiom1WgqZTTCjORAADD0sW7Qp0942.jpg "title=" mri% E7rp3i1~meh]t6r9rzs.png "alt=" Wkiom1wgqzttcjoraadd0sw7qp0942.jpg "/>PC1 belongs to VLAN10,PC2 belongs to VLAN20PC1 ip:192.168.10.254/24 R1 g0/0/0 ip:12.0.0.1/24PC2 ip:192.168.20.254/24 R2 g0/0/0 ip:12.0.0.2/24SW1 VLAN1 ip:192.168.1.10/24SW2 VLAN1 ip:192.168.1.20/24Experimental contentR1 analog Network Export routing, R2 analog operator equipment1. Do static

I personally understand the virtual machine, the virtual machine is the most convenient and most difficult to understand the NAT way to chat with everyone, because it is a liar NAT, so that will be wordy point, but mainly to take care of new people. ：) The old birds quickly fly bar hehe Let's talk about something else first. Suppose that now the teacher R with 3 classes of students, respectively, Class A

The following describes three network modes (bridging, nat, and Host-only) of virtual machines. Many people often encounter problems when installing virtual machines, but vmware has three network modes, it is also a bit confusing for beginners. Today I am going to use three virtual machine-based network models to help you popularize the background of Virtual Machine Internet access.Virtual Machine Network Mode: vmware, virtual box, virtual pc, and oth

emerged to solve this problem. The following describes how to use the NAT Network Address Translation Service to solve this problem.1. NAT IntroductionThe NAT Function is to connect a network with a private IP address to the INTERNET of a public network. When an internal network with a private IP address sends data through a

to the location, information flow statistics.5> can improve access speed: Usually the proxy server is set up a large hard disk buffer, when the outside information through, save it to the buffer, when other users access the same information, directly from the buffer to improve access speed.Two. Network Address translation NAT1. About Network Address translation NATNetwork address translation Nat was proposed in 1994, which requires the installation o

The principle of iptablesnat is the same as that of the filter table. The nat table also has three default chains (chains): PREROUTING: the destination DNAT rule redirects external access to other hosts, such as internal SERVER, or DMZ. Because only the destination IP address of the data packet is checked during routing, the destination PREROUTINGDNAT must be performed before routing. IptablesNat principles Like filter tables,

Topology1. DNAT (Dynamic)int fa0/0IP nat Insideint FA0/1IP Nat OutsideIP nat Pool Isp-pool 198.51.100.3 192.51.100.14 netmask 255.255.255.240IP nat inside source list 1 pool Isp-poolAccess-list 1 Permit 10.1.1.0 0.0.0.255Show ip NAT Translations2 SNAT (Static)IP

NAT (network address translation) simply translates an IP address into another IP address, which is typically used for conversion between unregistered internal addresses and legitimate, registered Internet IP addresses. It is suitable for resolving the Internet IP address tension, do not want to let the network outside know the internal network structure and so on. Each NAT conversion is bound to increase t

Zhan Bo Juniper) SRX is relatively simple to establish a VPN site, and NAT is also simple to use. What I want to talk about is the joint application between them. Requirements: Local A and local B establish A VPN site connection, A remote place C through the leased line to the local, the remote only to the local A route, and cannot add A route. Remote C is required to access VPN Site B through local. Let's take a look at the configuration of the VPN s

There are still many things worth learning about Cisco router configuration. Here we will mainly introduce the details about Cisco router configuration. How to configure NAT Network Address Translation) so that computers on the Internet can access their internal Web and email servers through their Cisco router configurations. This requires a static NAT translation between a dedicated public IP address and a

Destination NAT changes the destination IP address of the data packet. when a data packet from the Internet accesses the public IP address of the network interface of the NAT server, the NAT server converts the destination address of these packets to an appropriate intranet IP address and then routes it to the intranet computer. In this way, servers using intrane