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
2. Check the status of the firewall
Added by kabucek on Fri, 03 Jul 2020 19:18:49 +0300
Fastdfs_5.08 + nginx_14.0 cluster deployment
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 ...
Added by knucklehead on Thu, 11 Jun 2020 07:13:58 +0300
The article about Istio traffic hijacking can be found in a very detailed article in the servicemesher community at present. You can refer to: Sidecar injection and transparent traffic hijacking in Istio . In particular, the "traffic hijacking diagram" collated by the blogger can clearly see the hijacking process. Here I use ...
Added by river001 on Fri, 29 May 2020 09:27:35 +0300
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 ...
Added by 01706 on Thu, 28 May 2020 07:10:56 +0300
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 ...
Added by bongbong on Wed, 20 May 2020 18:04:50 +0300
Rootkit needs to find out if there is a program catching it in time, and the detection program itself needs to be vigilant about Rootkit injection and left-right interaction.
The instrumentation program found Rootkit to be very versatile, and I've previously described how to static scan through address ranges that are called from each other by ...
Added by psychowolvesbane on Mon, 04 May 2020 17:14:17 +0300
Firewall firewalld learning summary for RHEL Linux 7 This paper describes firewalld, a firewall configuration tool under RHEL 7.Before RHEL 7, we generally used iptables firewall management tools. In fact, neither iptables nor firewalld are real firewalls. They are just firewall management tools used to define firewall policies, or they are j ...
Added by alpha2zee on Sun, 01 Mar 2020 18:37:06 +0200
1. Introduction to Squid
2. Cache Agent
3. Compile, install and optimize Squid manually
4. Establishing Traditional Agents
5. Setting up transparent agents
1. Introduction to Squid
(1) Squid is a high performance proxy cache server that supports FTP, gopher, HTTPS and HTTP protocols.Unlike general proxy caching software, Squid ha ...
Added by procoder on Tue, 24 Dec 2019 21:02:40 +0200
Introduction to LVS
LVS (Linux Virtual Server), the Linux virtual server, is an open source load balancing project led by Dr. Zhang Wensong. At present, LVS has been integrated into the Linux kernel module.The project implements an IP-based load balancing scheduling scheme for data requests in the Linux kernel. The architecture of the scheme ...
Added by Optimo on Wed, 27 Nov 2019 05:19:33 +0200
I. check iptables service status
First check the status of iptables service
[root@woxplife ~]# service iptables status
iptables: Firewall is not running.
The iptables service is installed, but the service is not started.
You can install it directly if it is not installed.
yum install -y iptables
Added by Flukey on Thu, 31 Oct 2019 13:33:03 +0200