openvpn udp

How to Use OpenVPN and PrivacyIDEA to establish two-factor authentication Remote Access For the company, IT has become a trend to allow employees to access the company's IT resources at home or on a business trip through the VPN remote access system. However, weak employee password management awareness and attacks by attackers using social engineering libraries often provide convenient channels for attackers. The two-factor authentication system is ve

OpenVPN is another VPN software package different from PPTP and L2TP. it is based on ssl vpn. The use of OpenVPN requires client support. Here the system is CentOS6.2. I. check the environment required by OpenVPN. OpenVPN requires support from TUN devices and nat module support from iptables. 1. check the TUN module: m

Installing openvpn in Ubuntu is simple. apt-getinstallopenvpn is followed by buildkey and server and client configuration. for details about how to maintain the DNS on the openvpn Server, refer to/etc/resolv. after openvpn is installed in conf, save it ~ /Iptables-init.sh and then run Installing openvpn in Ubuntu is si

You need to turn on SSH to connect your cloud server as root or user using sudo to access SSH connections. This guide assumes that users use sudo access. But you can take things using roots only by stripping "sudo" from the start of each command. If you are running Linux or Mac on your system, you can use the SSH terminal program. If you are using Windows, you can use putty to login to SSH. Once the terminal is open, assuming you are using the LINUX/MAC system, you can login to enter the followi

OpenVPN server verified by account and password EnvironmentServer: CentOS 6.7 32-bitClient: Windows XP Server Configuration# Disable SELinuxSed-I '/^ SELINUX \ B/s/=. */= disabled/'/etc/selinux/configSetenforce 0 # Install mysql-serverYum-y install mysql-server # Start the mysqld serviceService mysqld start # Initialize the mysql administrator passwordMysqladmin-uroot password RedHat # Create a radius DatabaseMysqladmin-uroot-predhat create radius # I

Generally, Linux servers that provide Web Services seldom need to connect to OpenVPN, but personal Linux computers often need to connect to OpenVPN. For example, if you use Linux as the development environment, you need to connect to the company's OpenVPN. This document uses Ubuntu as an example to describe how to connect to the remote

OpenVPN is another VPN software package different from PPTP and L2TP. It is based on ssl vpn. The use of OpenVPN requires client support. Here the system is CentOS6.4.I. Check the environment required by OpenVPNOpenVPN requires support from TUN devices and the nat module of iptables.1. Check the TUN module:Modinfo tunShown as follows: If an error is reported, the TUN device is not supported. 2. In OpenVZ VP

Before installation, use cat/dev/net/tun to check whether tun/tap [root @ lx_web_s1 ~] is enabled. # Cat/dev/net/tuncat:/dev/net/tun: Filedescriptorinbadstate indicates that tun/tap has been enabled. you can install openVPN and configure the VPN server. 1. install and prepare yum-yinsta. Run cat/dev/net/tun to check whether tun/tap is enabled before installation.[Root @ lx_web_s1 ~] # Cat/dev/net/tunCat:/dev/net/tun: File descriptor in bad stateIt ind

[Centos] install openvpn server (easy-rsa3)VPN is widely used in office and fan wall fields. We may use it in small office networks recently. Learn it first.The vpn server must have a public ip address, which can be used by clients in multiple environments.ConceptPKI: Public Key Infrastructure CA: core of Certificate Authority pkiCentos6.6 in virtual machine environmentNic eth0 Link encap:Ethernet HWaddr 00:50:56:35:E7:EC inet addr:19

Code [Root@vpnserver ~]# ntpdate time.nist.gov[Root@vpnserver ~]# Mkdir/byrd/tools-p[Root@vpnserver ~]# Mkdir/byrd/service[Root@vpnserver ~]# cd/byrd/tools/[Root@vpnserver tools]# wget http://www.oberhumer.com/opensource/lzo/download/lzo-2.06.tar.gz #lzo压缩模块[Root@vpnserver tools]# tar zxf lzo-2.06.tar.gz[Root@vpnserver tools]# CD lzo-2.06[Root@vpnserver lzo-2.06]#./configure[Root@vpnserver lzo-2.06]# make make install[Root@vpnserver lzo-2.06]# echo $?0[Root@vpnserver lzo-2.06]# CD ...[Root@vpn

The recent OpenVPN service abnormal quit many times, because the original in order to troubleshoot problems record a large number of debug log, resulting in problems when you want to locate the problem is very difficult, the instant log was brushed off, the process dropped, instantaneous start, instantaneous and dropped, resulting in a lot of orders lost! Because the day file records too much useless information, dare not to search the log to locate t

The recent OpenVPN service abnormal quit many times, because the original in order to troubleshoot problems record a large number of debug log, resulting in problems when you want to locate the problem is very difficult, the instant log was brushed off, the process dropped, instantaneous start, instantaneous and dropped, resulting in a lot of orders lost! Because the day file records too much useless information, dare not to search the log to locate t

The difference between an OpenVPN internal route and a system route is that the system route completely follows the longest prefix matching principle. After finding the route, the data packet is forwarded from the corresponding Nic interface. Although the routes inside OpenVPN ultimately decide whether to forward and where to forward data packets, this "whether to forward" and "where to forward" is very dif

Details of the Linux neighbor subsystem: confirm-OpenVPN server mode MAC address learning, confirm-openvpnmacIn the article parsing the aging time principle of ARP cache implemented by Linux, I analyzed the conversion of the neighbor subsystem of IPv4 on the Linux protocol stack and again pasted the state machine Conversion Diagram, but this figure is more detailed, because it has an external input, that is, confirm: Note that if the socket or routi

OpenVPN client configuration tutorial in Ubuntu generally, Linux servers that provide Web Services seldom need to connect to OpenVPN, but personal Linux computers often need to connect to OpenVPN. For example, if you use Linux as the development environment, you need to connect to the company's OpenVPN. This document u

OpenVPN Increase the script for logging user log Cat connect.sh #!/bin/bash time= ' Date +%f ' if [-f/etc/openvpn/log/openvpn_$time.log];then touch / Etc/openvpn/log/openvpn_$time.log echo "' Date ' +%f%h:%m:%s ' User $common _name trust_ip $trusted _ip is login, REMOTE_IP is $ifconfig _pool_remote_ip, Mask is $route _netmask_1 ">>/etc/

OpenVPN is the first choice for VPN servers. There are two solutions for how openVPN breaks through the firewall blocking. One is to use the http-proxy that comes with openVPN, second, use HttpTunnel 1. the http-proxy provided by liopenvpn breaks through the firewall blockingOpenVPN itself can use an http proxy. That is to say, the

By simply using the openvpn proxy, all traffic on the local machine will go through the Remote VPN Server. However, when we roll over the wall, it is generally the traffic webpage, that is, as long as the http traffic goes through the VPN. Openvpn combined with squid's http forward proxy can provide the wall-over function for Web browsing, while other traffic such as QQ and thunder still follows the normal

OpenVPN multi-processing-netns container and iptablesCLUSTERIf you still indulge in the previous results and the imposed sighs, do not meditate and sublimate them.Ip netns add vpn1Ip link add veth0_vpn1 type veth peer name veth_vpn1Then, veth0_vpn1 is assigned to vpn1, and veth0_vpn2 is assigned to vpn2.Ip link set veth0_vpn1 netns vpn1Connect veth_vpn1, veth_vpn2, and eth0 together:Brctl addbr br0Now, run OpenVPN