zyxel firewall configuration

First, the introduction The application of hardware firewall, is now more and more, the product is also very rich. Most of the domestic firewall with Chinese instructions and some corresponding configuration examples, but the foreign products are almost no Chinese instructions. Second, physical connection Pix515 appearance: is a standard rack-type equipment, heig

The port itself is turned on by default, but does not mean that the link to the port must be up. Only link devices are connected and connected devices such as PC are working properly ...Three-layer switch port, still have 24, or fa0/1-24, its three-tier routing function is not implemented through the FastEthernet port, but through its VLAN interface to achieve,therefore, on the two two-layer switch of unicom, it is necessary to configure VLAN to realize interoperability. Accordingly, the export

#!/usr/bin/expect-fif {$ARGC! = 3} {Send_user "Usage: $argv 0 Exit}Set timeout 1Set term ANSISet SERVER [lindex $argv 0]Set LOGIN [lindex $argv 1]Set PASSWD [lindex $argv 2]Spawn TelnetExpect "telnet>"Send "open $SERVER \ r"Sleep 10Expect "Login:"Send "$LOGIN \ r"Sleep 1Expect "Password:"Send "$PASSWD \ r"Sleep 1Expect "*>"Send "en\r"Sleep 1Expect "*#"Log_file/var/log/conf/[clock format [clock seconds]-format "%y-%m-%d"]. $SERVER. LogSend "show run\r"while (1) {Sleep 1Expect {-ex "--more--" {sen

Tags: Firewall Configuration650) This. width = 650; "src =" http://s3.51cto.com/wyfs02/M00/49/DC/wKiom1QczEnDZslaAAEKZaNZVUI778.jpg "Title =" pix31.jpg "alt =" wkiom1qczendzslaaaekzanzvui778.jpg "/>650) This. width = 650; "src =" http://s3.51cto.com/wyfs02/M01/49/DE/wKioL1QczHuhycRKAAGxVaDccbo931.jpg "Title =" pix32.jpg "alt =" wkiol1qczhuhycrkaagxvadccbo931.jpg "/>650) This. width = 650; "src =" http://s3.51cto.com/wyfs02/M01/49/DC/wKiom1QczH2xWZyXAA

Configure the iptables configuration parameters of the Centos6.x series firewall:System environment:[Root @ hk service] # uname-mX86_64[Root @ hk service] # cat/etc/redhat-releaseCentOS release 6.6 (Final)[Root @ hk service] # uname-Linux www.111cn.net 2.6.32-042stab113. 11 #1 SMP Fri Dec 18 17:32:04 MSK 2015 x86_64 x86_64 x86_64 GNU/LinuxConfiguration process:[Root @ hk/] # iptables-a input-p tcp -- dport 22-j ACCEPT # allow access by the ssh adminis

vi/etc/sysconfig/iptables # Generated by Iptables-save v1.4.7On Mon Feb9 -: -: - -*nat:prerouting ACCEPT [0:0]:P ostrouting ACCEPT [0:0]:output ACCEPT [0:0]-A prerouting-p tcp-m TCP--dport the-j REDIRECT--to-ports8080commit# completed on Mon Feb9 -: -: - -# Generated by Iptables-save v1.4.7On Tue Jan - -: Geneva:Geneva -*filter:input ACCEPT [1: the]:forward ACCEPT [0:0]:output ACCEPT [1:164]-A input-m state--state new-m tcp-p TCP--dport the-J ACCEPT-A input-m state--state new-m tcp-p TCP--

A newly configured server, installed CentOS6.3 system, after the installation of LNMP, the discovery Nginx process exists, and PHP parsing is normal, but with the allocation of independent IP to access the time found to be inaccessible.Check the information on the Internet, it is possible that the Linux firewall iptables caused nginx can not access. We visit a Web site, typically with 80 ports, then the problem may be that the 80-port access is interc

Iptables IntroductionIptables is a core based firewall, very powerful, iptables built-in Filter,nat and mangle three tables.Filter is responsible for filtering packets, including the chain of rules, input,output and forward;NAT is concerned with network address translation, including the rule chain, prerouting,postrouting and output;Mangle table is mainly used to modify the contents of the packet, used to do traffic shaping, the default chain of rules

Iptablesa network firewall, used under Linux, RedHat9.0 version of the above comes with. It can implement NAT conversion, can do Internet proxy. First, for the server configuration, the first step is to turn off the firewall, in the absence of graphical Linux, using the command lineThere are two ways to1, Setup and then close.2.Stop

Server cmd Enter mysqlmysql-u root-p input passwordOpen remoteGrant all privileges on * * to [email protected] '% ' identified by ' password ';Flush privileges; Then firewall release 3306 Port method/step WINDOWS2008R2 System Firewall in the Control Panel to find (also can be found in the Server Manager) Click to go to the 08 Firewall Settings tab and note

# Iptables -- helpiptablesv1.3.5 configure iptables static firewall initialization firewall iptables-F // -- flush-F [chain] Deleteallrulesinchainorallchainsiptables-X // -- delete-chain-X [chain] Deleteauser-def # Iptables-- Help Iptables v1.3.5 Configure iptables static firewall Initialize firewall Iptables-F // -- f

After a web server is built on a virtual machine, the host cannot be accessed, as shown in the following figure: 1. The local machine can ping Virtual Machine 2. The VM can also ping the host 3. Virtual machines can access their own web4. The reason why the local machine cannot access the web of the virtual machine is the firewall. Many examples of firewall settings on the Internet are also a bit complicate

It is necessary to configure the iptables firewall in CentOS. Let's learn how to configure it! Set the firewall in Linux. Take CentOS as an example to open the iptables configuration file: Vi/etc/sysconfig/iptablesRun the/etc/init. d/iptables status Command to check whether port 80 is enabled. If port 80 is not enabled, you can use either of the following methods

Iptables firewall basic configuration operating system environment: CentOS5.5 I. iptables reads the inbound and outbound packet headers and compares them with the rule set, forward acceptable data packets from one network adapter to another. rejected data packets can be discarded or processed as defined. II. self-contained IPTS in CentOS5.5 IptablesBasic firewall