Redhat Install VNC and firewalls

VNC: is a good remote control tool software. VNC is a free open source software based on UNIX and Linux operating systems, powerful and efficient in remote control, with performance comparable to any remote control software in Windows and Macs

Before I installed VNC, I configured the Yum source and installed the graphical interface

First: Yum search VNC to see what versions of VNC are

Second: Yum install tigervnc-server.x86_64 Install VNC Service Edition (to mount ISO system files prior to this)

Third: Vncserver start VNC (each time the first start is 1, the second is 2, and so on, can start VNC multiple times)

Close Vnc:vncserver-kill:1 (this 1 for the first start of VNC)

Login VNC Enter your network ip:1 (this 1 is the first time you start VNC; 2 for the second time)

Set the Vncserver to boot with the system.
Command: Chkconfig vncserver on
Or: Chkconfig vncserver--level 5 on

Set VNC password: vncpasswd

Restart VNC Service: Service vncserver restart

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We can't log in now because we're shutting down the firewall.

Service iptables Status View Firewall state service iptables start Firewall service iptables stop shutdown firewall Service iptables Restart Reboot Firewall firewall development oversize port: Cd/etc/sysconfig vi iptables Modify file add:-A rh-firewall-1-input-m The state--state new-m tcp-p TCP--dport 8080-j ACCEPT this side of the 8080 represents the open 8080 port after the firewall----------------------------- ---------------------Save the settings for the firewall serivce iptables save
View iptables rules and numbering iptables-nl--line-number
Closes all input FORWARD (forwarding) output of all ports iptables-p INPUT drop iptables-p FORWARD DROP iptables-p OUTPUT Drop
Open only 22 port iptables-a input-p TCP--dport 22-j ACCEPT iptables-a output-p TCP--sport 22-j
Parameter explanation: –A parameter is to add a rule –p specify what protocol, our common TCP protocol, and of course, UDP, for example, 53 port Dns–dport is the target port, when the data from the outside into the server for the target port –sport data from the server out, Use –J for the data source port is specified as ACCEPT-receive or DROP is not received