best vpn for linux

segment. localip indicates the IP address of the server, and remoteip indicates the IP address assigned to the client, which can be set as a range. here we use the default pptp configuration: Localip 192.168.0.1 Remoteip 192.168.0.234-238,192.168 .0.245 Note that the IP segment settings will directly affect the command for adding iptables rules. please note that the matching is correct. if you are too troublesome, we recommend that you use the configuration in this article to copy commands and

Description RouterOS Server ip:172.31.101.80 RouterOS version: RouterOS V6.15 Demand: To configure the PPTP VPN server on the RouterOS server, the PPTP VPN Client dial-in network segment is: 172.31.101.60-172.31.101.79 Operation Steps: First, login RouterOS server Use Winbox to login here RouterOS Winbox Download: Http://download2.mikrotik.com/route

N2N is a two-tier point-to-point virtual private network (VPN) that allows users to develop typical peer-to-peer applications at the network level rather than the application level. This means that users can gain local IP visibility (for example, two PCs belonging to the same n2n network can ping each other), and no matter which network they are in, they can access it as long as they have the same network IP address. In short, just as OpenVPN has move

networking configuration.. /etc/sysconfig/networkif [ ${NETWORKING} = "no" ]thenexit 0fi[ -x /usr/sbin/$SERVICE ] || exit 0RETVAL=0start() {echo -n "Starting $SERVICE: "if [ ! -d /var/run/xl2tpd ]thenmkdir /var/run/xl2tpdfidaemon $SERVICERETVAL=$?[ $RETVAL -eq 0 ] touch /var/lock/subsys/$SERVICEecho ""return $RETVAL}stop() {echo -n "Stopping $SERVICE: "killproc $SERVICERETVAL=$?echo[ $RETVAL -eq 0 ] rm -f /var/lock/subsys/$SERVICEreturn $RETVAL}restart() {stopstart}# See how we were called.ca

Network Configuration:/Etc/sysconfig/networkNETWORKING = yesNETWORKING_IPV6 = yesHOSTNAME = localhost. localdomainGATEWAY = 192.168.5.1 /Etc/sysconfig/network-scripts/ifcfg-eth0# Advanced Micro Devices [AMD] 79c970 [PCnet32 LANCE]DEVICE = eth0 // used to set the name of the Network InterfaceBOOTPROTO = static // set whether the network interface is configured as static or dhcp;BROADCAST = 192.168.5.255HWADDR = 00: 0C: 29: D1: 42: 3FIPADDR = 192.168.5.247 // set the network interface addressGATEW

;>/etc/pptpd.conf [Root@vpn_server soft]# echo "Remoteip 172.16.1.10-15" >>/etc/pptpd.conf [Root@vpn_server soft]# Tail-2/etc/pptpd.conf Localip 198.168.136.137 Remoteip 172.16.1.10-15 In the edit/ETC/PPP/OPTIONS.PPTPD file, add DNS for VPN: [Root@vpn_server soft]# echo "Ms-dns 114.114.114.114" >>/etc/ppp/options.pptpd [Root@vpn_server soft]# echo "Ms-dns 8.8.8.8" >>/etc/ppp/options.pptpd [Root@vpn_server soft]# Tail-2/etc/ppp/options.pptp

After the vpn is installed, a 800 error is prompted when you connect to the vpn using windows. Generally, the firewall does not open the corresponding Port. In this case, add the port to the firewall. The code is as follows:Iptables-a input-m state-state NEW-m tcp-p tcp-dport 1723-j ACCEPTService iptables save (save)Service iptables restart (restart the service to make the configuration take effect)Tip: If

Description RouterOS Server ip:172.31.101.80 RouterOS version: RouterOS V6.15 Demand: To configure the PPTP VPN server on the RouterOS server, the PPTP VPN Client dial-in network segment is: 172.31.101.60- 172.31.101.79 Operation Steps: First, login RouterOS server Use Winbox to login here RouterOS Winbox Download: Http://

are encrypted with IPSec. An internet-based PPTP server is a VPN server that uses the PPTP protocol, one with an interface on the Internet and another interface on an intranet. 　　PPTP connection process and tunnel maintenance The PPTP control connection is established between the PPTP client IP address and the PPTP server IP address, the PPTP client uses the dynamically assigned TCP port number, and the PPTP server uses the reserved TCP port number

The company now uses iptables as the firewall in the LAN, the Internet is no problem. This time, because of the test, you need to connect PPTP VPN. The problem is, the VPN dial has failed and reported 619 errors. I have no problem with my cell phone or my home dialing. Landing the router, the PPTP support all open to try again, the result is not. Then find the reason for iptables, finally finally resolved

MASQUERADE II configure iptables on the right Gateway # Iptables-t nat-a postrouting-o eth1-s 172.16.1.0/24-d! 192.168.1.0/24-j MASQUERADE 5. Start ipsec and connect # Service ipsec start # Ipsec verify Checking your system to see if IPsec got installed and started correctly: Version check and ipsec on-path [OK] Linux Openswan U2.6.34/K2.6.18-164. el5 (netkey) Checking for IPsec support in kernel [OK] SAref kernel support [N/A] NETKEY: Testing XFRM r

Install necessary software Apt-get install pptpd kernel-tree-2.6.10 kernel-package Apt-get install kernel-patch-mppe libc6-dev Decompress Linux kernel Cd/usr/src Tar xjf kernel-source-2.6.10.tar.bz2 Configure the kernel I copied an existing config file. Cd/usr/src/kernel-source-2.6.10 Cp/boot/config-2.6.10-1-686-smp. config Compile the kernel Make-kpkg -- added-patches debian, mppe -- append-to-version-686-smp-mppe -- initrd kernel_image Then go to t

After verification, we know The reason for the error on my side is that the iptables rule does not open 1723 ports Solution: The code is as follows Copy Code Chkconfig iptables offService Iptables Stop==============Iptables-t nat-a postrouting-o Eth0-j MasqueradeIptables-a input-i eth0-p TCP--dport 1723-j ACCEPTIptables-a input-i eth0-p gre-j ACCEPTIptables-a forward-i ppp+-o eth0-j ACCEPTIptables-a forward-i eth0-o ppp+-j ACCEPTIptables-a output-p TCP--dport 1723-

The following log contents appear for each connection failure when Rehl (619 error) occurs when the PPTP VPN server connection is set up to view the system log [Cat/var/log/messages |grep pptpd]: Gre:read (fd=6,buffer=80504c0,len=8196) from PTY failed:status =-1 Error = Input/output error, usually caused by unexpec Ted Termination of PPPD, check option syntax and PPPD logsCtrl:pty Read or GRE write failed (pty,gre) = (6,7)Ctrl:reaping Child ppp[13354

solution will not be guaranteed. Solution 2: wired The cable solution can only deploy single-mode optical fiber cables at a distance of 12 kilometers, which is more time-consuming and costly. You can say you don't have to think about it. Solution 3: Internet + VPN The Internet can be said to be a public wide area network, and many telecom operators have established a four-way and eight-way long-distance network, which makes it possible for our compan

is a powerful, highly configurable, ssl-based VPN (Virtual Private Network) Open Source software. It has multiple verification methods and many powerful functions. OpenVPN operates on layer 2nd or layer 3rd of the OSI model and uses SSL/TLS protocol for network transmission. Supports various customer authentication methods, such as certificates, smart cards, and user name and password certificates. In addition, there is a powerful ACL function that l

ifconfig. Create an iptables file in the/etc/network/if-up.d/directory with the following content:#! /Bin/sh Iptables-restore Add the execution permission to the script:Chmod + x/etc/NET/if-up.d/iptables Modify/etc/sysctl. the conf content is as follows: There are two items not listed above. You can simply add them directly. Other projects mainly remove comments. In fact, you can directly copy the following content to the configuration file:Net. ipv4.ip _ forward = 1 Net. ipv4.conf. all. send_r

Rd and RT (mpls vpn bgp) Rd (route-distinguisher) is used to identify different VPN instances on the PE device. Its main function is to achieve address multiplexing between VPN instances. It and the IP address constitute a 12byte vpnv4 address space, rd and the route are carried together in the bgp update message and published to the peer end. On the one hand, we

Compile a Python script to configure VPN in batches and a python script vpn tutorial Origin As we all know, the recent network is not harmonious, the speed is slow, and the VPN is still disconnected. Fortunately, yunti provides a lot of servers for switching, but there are quite a lot of yunti servers, in Linux, Networ

after restart.For client 741 errors, see: http://bbs.aliyun.com/read/161352.html2. The local vpn settings are as follows: 1. set vpn connection properties-Network-TCP/IP protocol-advanced cancel "use the default gateway on the remote network" so that the global data of the VPN connection still goes through the local network. 2. Set the local route table with a s