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vsftpd introduction vsftpd is the abbreviation of "very secure FTP daemon". Security is one of its biggest features. vsftpd is the most popular FTP server program in Linux distribution. It is characterized by small, light, safe and easy to use. ubuntu install vsftpd $ sudo apt-get install vsftpd Configure vsftpd ...

iptables setting h323 dynamic open port 1. Insert h323 module In order to support the h323 protocol, the kernel needs to insert the NF conntrack, NF NAT, and h323 modules. modprobe nf_conntrack_h323 modprobe nf_nat_h323 2. Configure iptables rules h323 uses 1719, 1720 ports. But mainly use port 1720. The prototype of ip ...

11.2.1.2 find service information In addition to the IP address, each socket address includes an integer port number. Many applications can run on the same host and listen to an IP address, but only one socket can use the port of that address at a time. By combining IP address, protocol and port number, a communication ...

vsftpd overview vsftpd is the abbreviation of "very secure FTP daemon". Security is one of its biggest characteristics. vsftpd is the name of a server running on a UNIX like operating system. It can run on systems such as Linux, BSD, Solaris, HP UNIX, etc. it is a completely free, open source FTP server software that supports many f ...

Verification and data processing 1. URL verification // 1. verify url function isURL(str_url) { var strRegex = "^((https|http|ftp|rtsp|mms)?://)" + "?(([0-9a-z_!~*'().&=+$%-]+: )?[0-9a-z_!~*'().&=+$%-]+@)?" // user@ of ftp + "(([0-9]{1,3}\.){3}[0-9]{1,3}" // URL in IP form ...

Recently, when using FTPClient to continuously read the contents of multiple files on ftp, we encountered two problems: 1. In the for loop, FTPClient can only read the contents of the first file. When reading the second file, it encountered NPE problems. 2. The program is locked. Next, we will analyze the problems encountered and provide sol ...

1. install make yum install gcc automake autoconf libtool make 2. install gcc yum install gcc gcc-c++ 3. Install pcre Library Download address: https://pan.baidu.com/s/13Kojg2Xcnp06qiw023uHoQ Upload the downloaded pcre-8.35.tar.gz through ftp to the directory / usr/local/src of centos7. cd /usr/local/src # New pcre directory mkdir /usr ...

This article mainly writes some shell script sorting tools. sort Summary Sort is a tool to sort the contents of files in behavioral units, or according to different data types. usage sort parameter -f: ignore case-b: ignore the space before each line-M: sort by month-n: sort by number-r: reverse sort-u: equivalent to uniq, indicating that o ...

ACL Access Control List Structure Diagram Objective of this chapter Learn TCP and UDP protocolsOverview of access control list, how access control list worksType of access control list.Configuration of standard access control class tableCreate ACLApply ACLy to interfaceConfiguration instance of standard ACL I. access control list (ACL) 2. ...

1. Network Communication Protocol Through computer network, many computers can be connected. The computers in the same network need to obey certain rules when connecting and communicating, which is just like the traffic rules when driving on the road. In computer networks, these rules of connection and communication are called network communi ...