Linux normal users use the following 1024 port problem

Because the Linux kernel kernel code prohibits ordinary users from using ports below 1024, many times when we want to start using 80 ports of Apache, Nginx, or Tomcat as a normal user for security purposes, we are forbidden by permission.

Workaround:

Typically, the application uses more than 1024 ports and then forwards the 80 port to the corresponding program port using a firewall (hardware firewall or iptables), such as forwarding 80 to 8080 ports.

Iptables Add a forwarding rule:

#iptables-A prerouting-t nat-p tcp--dport 80-j REDIRECT--to-port 8080

Then save the forwarding rules to the configuration file

#service iptables Save

or modify the configuration file directly

#vim/etc/sysconfig/iptables

Add under the *nat key

-A prerouting-p tcp-m tcp--dport 80-j REDIRECT--to-ports 8080

Other than that:

It is not recommended to pass the chmod u+s way, so that there is a breach of the original purpose of security.

Linux normal users use the following 1024 port problem