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Ubuntu Install UFW firewall sudo apt-get install ufw For general users, only the following settings are required: sudo apt-get install ufw sudo ufw enable sudo ufw default deny The above three commands are safe enough. If you need to open some services, you can use sudo ufw allow. Enable sudo ufw enable sudo ufw default deny #Aft ...

CentOS 7.0 uses firewall as a firewall by default and uses systemctl to manage services and programs, including service and chkconfig 1. View the default firewall status (not running when turned off, running when turned on) [root@localhost ~]# firewall-cmd --state not running 2. Check the status of the firewall [ro ...

Fastdfs_5.08 + nginx_14.0 cluster deployment Server planning: 1, All tracker and storage nodes should execute: 2, Configure tracker server 3, Configure storage server 4, File upload test (ip01) 5, Install fastdfs nginx module on all storage nodes 6, Verify: access files uploaded during test through ...

Firewall D is the front-end controller of iptables, which is used to implement persistent network traffic rules. It provides command line and graphical interfaces, which are available in the repositories of most Linux distributions. There are two main differences between using firewall D and controlling iptables directly: Firewall D uses zone ...

Today, my colleague said that a new cloud server is installed, and it is normal to log in Using ssh, but the above service port of Dayun database cannot be accessed. Using netstat ANP to view the port is normal to listen, and the listening address is also allowed to be accessed by any ip And the firewall and iptables are both closed I was also ...

1. Install Postfix yum -y install postfix After installation, you need to replace the sendmail that comes with the system: rpm -e sendmail perhaps yum remove sendmail Modify MTA (default mail transfer agent) alternatives --config mta and enter directly. 2. Install Dovecot (post office forwarding) yum -y i ...

I. Dns DNSmasq is a small and convenient tool for configuring DNS and DHCP, which is suitable for small networks. It provides DNS function and optional DHCP function. It serves domain names that are only applicable locally, and these domain names will not appear in DNS servers around the world. DHCP server combines with DNS server, and allows ...

Preceding text Assume you have basic knowledge of Azure and SQL Server HA Assume you have basic knowledge of Azure Cli The goal is to create an availability group with three replicas on Azure Linux VM and implement listener and Fencing configuration Environmental Science SQL Server 2019 Developer on Linux Azure VM Fencing agent Azure Cli imp ...

1. For the installation of bind 9, it is assumed that bind 9 has been installed through apt get 2. Enter the directory / etc/bind 3. Create a zone record file (similar to db.xxx): Here I create db.testlyhh.com 4. Edit the named.conf.default-zones file and add the following: zone "testlyhh.com" {           type master ...

This article was first published in: https://www.itcoder.tech/posts/how-to-install-elasticsearch-on-centos-8/ Elasticsearch is an open source full-text search and analysis engine.It supports RESTful operations and allows you to store, search, and analyze large amounts of data in real time.Elasticsearch is one of the most popular search engines ...