f5 snat

Snat is the source address translation, its role is to convert the IP packet source address to another address, some people may find it strange, good why to do IP address translation Ah, in order to understand this problem, we have to look at the LAN user on the principle of public network, Assuming that the intranet host a (192.168.2.8) to communicate with the external Host B (61.132.62.131), a to B IP packets, if there is no

like you find a box of milk that has expired, so ask others, can not drink, if others say yes, you drink it, if others say no, then you have to find another box of fresh milk.As for F5 Refresh, its HTTP request message header is as follows:Host 192.168.3.174:8080User-agent mozilla/5.0 (Windows NT 5.1; rv:5.0) gecko/20100101 firefox/5.0Accept text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8Accept-language zh-cn,zh;q=0.5Accept-encoding g

Why can't I use ssh for my snat script? -- Linux Enterprise Application-Linux server application information. For details, refer to the following section. 1. First create the file/etc/rc. d/snat-firewall, as shown below: #! /Bin/bash Echo "1">/proc/sys/net/ipv4/ip_forward # Internet; INET_IFACE = "eth0" INET_IP = "***.***.***.***" # LAN; LAN_IFACE = "eth1" LAN_IP = "10.1.1.8" LAN_IP_RANGE = "10.1.1.0/8" EPT

Differences between SNAT and dnat snat, DNAT, and MASQUERADE are nat masquerade. SNAT is a special case of SNAT. When a data packet is sent from the network adapter, replace the source address in the data packet with the specified IP address, the receiver thinks that the source of the data packet is the IP address of t

Forwardingnet.ipv4.ip_forward = 1[[emailprotected] ipv4]# sysctl-p (refresh sysctl.conf file) Net.ipv4.ip_forward = 1 机器二:[[emailprotected] ~]# ifdown ens33 （确保不会通过此网卡连接）[[emailprotected] ~]# vim /etc/sysconfig/network-scripts/ifcfg-ens37 TYPE=EthernetBOOTPROTO=staticDEFROUTE=yesPEERDNS=yesPEERROUTES=yesIPV4_FAILURE_FATAL=noNAME=ens37UUID=a2d0be5d-0769-48b4-9270-b3eacd1d243eDEVICE=ens37ONBOOT=yesIPADDR=192.168.183.128NETMASK=255.255.255.0GATEWAY=192.168.1.3 （这里网关指向机器一公网ip）HWADDR=00:0c:29:ab:3

to add a dual network card, one as the gateway to the intranet, the other as a gateway to the extranet4 then close the server's Setenforce, also empty its firewall rule entry, and need to turn on its route conversion function, because it as a gateway to the intranet, if not open the two machines can notMutual access5 here with the intranet Win7 access to the external Web server, you can see the success of the visit6 intranet can access the network after we start to do

This article introduces how to understand DNAT and SNAT in iptables in linux. DNAT (Destination Network Address Translation, Destination Address Translation) is usually called ". However, SNAT (Source Network Address Translation) is usually called "Source Network Address Translation. This is the two methods that we often use when setting the Linux gateway or firewall. I have not explained both of them clear

Snat and dnat in linux are well known. In order to protect the security of Intranet users, the linux firewall has the nat translation function, but the problem arises here, there are two types of nat: snat and dnat. But what kind of nat translation should we use? Here I will briefly describe these two conversions. Snat is a source address translation technology.

An understanding of snat, dnat, and loop is actually called snat. dnat modifies the source address and destination address of the data packet, and saves the ing relationship before and after the modification, perform restoration operations as needed. Snat: Change the source address (snat) when you go out, change the de

Map First:650) this.width=650; "src=" Http://s3.51cto.com/wyfs02/M01/71/63/wKioL1XNqkfRseXAAADBVngbyOg956.jpg "title=" Qq20150814163456.jpg "alt=" Wkiol1xnqkfrsexaaadbvngbyog956.jpg "/>The Cisco router that this diagram is using. The fact is that you don't have to do snat.However, LVs NAT is similar to this model, some people say that LVs NAT is a group of Dnat, and now I'm going to confirmDoes LVS need to open iptables Snat to help realserver convert

SNAT, Dnat objective function The Ip_nat_rule_find () called in the IP_NAT_FN () function is used to find the NAT rules, perform the action of the rules, and the rule target is either Snat or Dnat, which is specifically implemented in Net/ipv4/netfilter/ip_nat_ In rule.c. Either Snat or Dnat rules, the goal function is ultimately to call the Ip_nat_setup_info (

This is the two ways we often use when setting up a Linux gateway or firewall. I have not explained these two very clearly before, and now I am here to explain. First, we'll look at the structure of the IP packet, as shown in the following illustration:In any IP packet, there will be source IP address and destination IP address of the two fields, the packet passed by the router is based on these two fields is to determine where the packet is sent from, it will send packets to where to go. and I

://s3.51cto.com/wyfs02/M01/6D/60/wKiom1Vim7HCWcmzAAQPRb8YRlk111.jpg "title=" Picture 9.png "alt=" Wkiom1vim7hcwcmzaaqprb8yrlk111.jpg "/>now turn it back on again Win7 client's visit to the Linux -built Web site (preferably close the browser and reopen it). 650) this.width=650; "src=" Http://s3.51cto.com/wyfs02/M02/6D/60/wKiom1VinFCi3g-CAAVokfbzs8Y499.jpg "title=" Picture 10.png "alt=" Wkiom1vinfci3g-caavokfbzs8y499.jpg "/>Back to Linux-1 Check the log file of the httpd service again, you can see

There are three machines, A, B, and C. Machine A has Internet and Intranet IP addresses, and machine B and C only have Intranet. We configure machine B and machine C to access the Internet through machine.Assume that the Internet IP address of machine A is: 60.12.13.14 and the Intranet IP address is 192.168.0.1.Host B IP Address: 192.168.0.2The IP address of machine C is 192.168.0.3.On machines B and C, we configure the NIC configuration file and add machine A as the gateway.Modify VI/etc/sysc

Iptables learning 02 SNAT enables the linux forwarding function. [Plain] iptables-p forward drop sets the FORWARD chain policy to DROP, so as to control the Intranet ip address, you can add A rule to access the internet. ip addresses that are not in the rule cannot access the internet [plain] iptables-a forward-m state -- state ESTABLISHED, RELATED-j ACCEPT: This rule allows confirmation packages and associated packages from any address to pass. You m

First of all, Snat and Dnat are roughly equivalent to the NAT and Pat protocols in the network, this experiment is to use a linxu virtual machine to simulate the intranet gateway, and use the Iptables Firewall policy on Linux to achieve the purpose of address translation and port mapping.SNATExperimental structure:Real Machine ---------------- ( v1 ) Gateway Server S1 (v2)--------------(v2) External network server S2Open 2 Virtual Machine Linux , resp

Today, encountered a problem: LAN has 5 machines, only one public network IP. The demand now is that 5 machines must be able to access the extranet. What can be done about it. Of course, it's using Snat. That said, however, in the allocation of time, unexpectedly toss for half a day. Here's a good summary: Scenario Description: The IP address of 5 machines in LAN is192.168.180.121-node1192.168.180.122-node2192.168.180.123-node3192.168.180.124-node4192

equipment. F5 is also based on BSD system modifications (it is said to be the latest Linux based), but the important swap is implemented through a dedicated switching chip (similar to the special image processing chip, can save a lot of CPU on image processing operations), In this way, his performance will not depend very much on the processing power of the host's operating system. F5 load balance is mos

that the domain name blog.s135.com is resolved to an extranet/public virtual ip:61.1.1.3 (VS_SQUID) of the F5 load balancer, there is a server pool (POOL_SQUID) under the virtual IP that contains two real squid servers under the pool ( 192.168.1.11 and 192.168.1.12)?②? If the squid cache misses, the F5 intranet virtual ip:192.168.1.3 (Vs_apache) is requested, and there is a default server pool (Pool_apache

to apply themselves to the F5 website license 3, the general configuration of F5 (1) In the case of security requirements, the Setup menu can be opened telnet and FTP functions, easy to maintain later (2) Configure the VLAN UNIQUE_MAC option, which is to ensure that the MAC addresses of the different VLANs on the F5 are not the same. By default, the MAC addre