SELinux 开放关闭端口
前提 很多朋友估计会有这种经历， 在 Linux 中监听某个端口时， 但并不能被别的机器访问。 这主要是是因为这个端口没有被开放， 因此不可以访问。 网上有很多关于怎么开放端口的， 今天介绍一个很实用的工具 - semanage
semanage 简介 NAME semanage - SELinux Policy Management tool SYNOPSIS semanage {import,export,login,user,port,interface,module,node,fcontext,boolean,permissive,dontaudit,ibpkey,ibendport} ... positional arguments: import Import local customizations export Output local customizations login Manage login mappings between linux users and SELinux confined users user Manage SELinux confined users (Roles and levels for an SELinux user) port Manage network port type definitions interface Manage network interface type definitions module Manage SELinux policy modules node Manage network node type definitions fcontext Manage file context mapping definitions boolean Manage booleans to selectively enable functionality permissive Manage process type enforcement mode dontaudit Disable/Enable dontaudit rules in policy ibpkey Manage infiniband pkey type definitions ibendport Manage infiniband end port type definitions DESCRIPTION semanage is used to configure certain elements of SELinux policy without requiring modification to or recompilation from policy sources. This includes the mapping from Linux usernames to SELinux user identities (which controls the initial security context assigned to Linux users when they login and bounds their authorized role set) as well as security context mappings for various kinds of objects, such as network ports, interfaces, infiniband pkeys and endports, and nodes (hosts) as well as the file context mapping. See the EXAMPLES section below for some examples of common usage. Note that the semanage login command deals with the mapping from Linux usernames (logins) to SELinux user identities, while the semanage user command deals with the mapping from SELinux user identities to authorized role sets. In most cases, only the former mapping needs to be adjusted by the administrator; the latter is principally defined by the base policy and usually does not require modification. 查看开放的端口 semanage port -l | grep 5000 查看5000端口
