摘要： The client sends the PASV command to an FTP server on port 21. The source port is a random, high-numbered port. The destination port is 21. The server 阅读全文

摘要： apt install vsftpd -y root@test:~# adduser xman3Adding user `xman3' ...Adding new group `xman3' (1002) ...Adding new user `xman3' (1002) with group `x 阅读全文

摘要： Protocol: Encapsulated Security Payload (ESP) ESP is the wire-level protocol designed to secure communication by encrypting the encapsulated data and 阅读全文

摘要： IPSec VPN介绍 IPSec是为实现VPN功能而最普遍使用的协议。IPSec不是一个单独的协议，它给出了应用于IP层上网络数据安全的一整套体系结构。该体系结构包括认证头协议（Authentication Header，简称为AH）、封装安全负载协议（Encapsulating Security 阅读全文

摘要： root@test:~# ssh-keygen -t rsa Generating public/private rsa key pair.Enter file in which to save the key (/root/.ssh/id_rsa): Enter passphrase (empty 阅读全文

摘要： https://www.acunetix.com/blog/articles/establishing-tls-ssl-connection-part-5/ The process of establishing a secure SSL/TLS connection involves severa 阅读全文

摘要： Network virtual appliances (NVAs) are virtual machines that help with network functions, such as routing and firewall optimization. 阅读全文

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摘要： Instances in the private subnet are backend servers that don't need to accept incoming traffic from the internet and therefore do not have public IP a 阅读全文

摘要： useradd -s /bin/bash -d /opt/stack -m stack echo "stack ALL=(ALL) NOPASSWD: ALL" | tee /etc/sudoers.d/stack git clone https://git.openstack.org/openst 阅读全文