ubuntu firewall open port

Environment system: UbuntuTools: Xshell + VirtualBox1. Test whether the port of the remote host is turned on (Windows command line execution)Telnet 192.168.1.103 80Remote access host 80 port, test host's 80 port is turned on2. Check the local port

Since the 2.4 version of the Linux kernel, a very good firewall tool has been provided. This tool can divide, filter, forward, and so on the network data of the Access service, and then realize the functions such as firewall, Nat and so on.In

Comments: Ubuntu11.04 the default is UFW (ufw is short for uncomplicated firewall, which is not complex firewall. You still need to go to iptables for complicated settings). Interface operations are supported. Run the ufw command on the command line

Ubuntu11.04 default is UFW (UFW is the abbreviation of uncomplicated firewall, not complex firewalls, cumbersome parts of the setup or need to go to the iptables) firewall, has supported the interface operation. Run the UFW command at the command

One of the simplest operations:sudo UFW version firewall versions: UFW 0.29-4ubuntu1 Copyright 2008-2009 Canonical Ltd.Ubuntu system has UFW installed by default.1. Installationsudo apt-get install UFW2. Enablesudo UFW enablesudo ufw default

Ubuntu11.04 default is UFW (UFW is the abbreviation of uncomplicated firewall, not complex firewalls, cumbersome parts of the setup or need to go to the iptables) firewall, has supported the interface operation. Run the UFW command at the command

One of the simplest operations:sudo UFW status (if you are root, remove SUDO,UFW status) to check the status of the firewall, my return is: inactive (default is inactive).sudo UFW version firewall versions:UFW 0.29-4UBUNTU1Copyright 2008-2009

Ubuntu default installation is not open any firewall.When you use service iptables status , you are prompted to iptables:unrecoginzed service. This means that the service is not recognized.The following methods are from

Ubuntu default firewall installation. Enable. Configure. Port. View status-related informationOne of the simplest operations:sudo UFW status (if you are root, remove SUDO,UFW status) to check the status of the firewall, my return is: inactive

Http://blog.sina.com.cn/s/blog_866c5a5d0101ihxv.htmlThat's all you have to say.sudo ufw enable|disableBecause the Linux original firewall tool iptables too cumbersome, Ubuntu defaults to provide a firewall tool based on iptable UFW.Ubuntu 9.10