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RHEL6下yum -y install epel-release安装了epel源,但yum makecache出错。centos下安装完EPEL源然后更新一下yum缓存如果发现这样的错误:Error: Cannot retrieve metalink for repository: epel. Please verify its path and try again这就表明你需要更新CA证书了，那么只需要更新CA证书就可以，不过在此同时需要临时禁用epel源并更新就可以了，...

Host to Host IPsec Tunnel With Libreswan On CentOS 7.2 This is a guide on setting up a Host to Host IPsec tunnel between two CentOS 7.2 hosts. We will be using Libreswan as the implementation of IPsec. Libreswan is available in Ce...

How to configure an IPSec Tunnel in CentOSInstall ipsec-tools packageyum -y install ipsec-toolsConfiguring an IPSec Tunnel on CentOS is fairly straightforward.In the example, we’ll tunnel between fictitious servers with publi...

6.3. IPsec InstallationImplementing IPsec requires that the ipsec-tools RPM package be installed on all IPsec hosts (if using a host-to-host configuration) or routers (if using a network-to-network configuration). The RPM package conta...

IPSec VPN Configuration & Setup on CentOS/RHEL 7/6/5 Step by step with details are given below:What is IPSec?IPsec is a set of extensions to the IP protocol familyIt provides cryptographic security servicesIPSec Working principleIPSec w...

在 Linux 内使用 IPSEC 配置网络对网络和点对点的 VPN 连接...

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1.7  IPsec典型配置举例 1.7.1  采用手工方式建立保护IPv4报文的IPsec隧道 1. 组网需求 在 Router A和 Router B之间建立一条 IPsec隧道，对 Host A所在的子网（10.1.1.0/24）与 Host B所在的子网（10.1.2.0/24）之间的数据流进行安全保护。具体要求如下： 1-25 •  封装形式为隧道模式。 •  安全协议采用 ESP协议。 •  加密算法采用采用 12...

43.7.7.2. Manual IPsec Network-to-Network Configuration Suppose LAN A (lana.example.com) and LAN B (lanb.example.com) want to connect to each other through an IPsec tunnel. The network address for LAN A is...