CentOS installation VPN appears some of the site can not access the problem! Some forwarding rule settings for iptables
The NAT conversion rule is established, otherwise the dial cannot be connected to the public network through the remote gateway.
Iptables-t nat-a postrouting-o eth0-j snat–to-source $src _ip
Centos 6.4 Installing VPN problems with some Web sites that are inaccessible
Allow connection t
Spent two days studying, feeling pptpd seems to be much simpler, and the success rate is very high. There is no platform limit. This article takes CentOS the newest version 5.2来 to do the VPN server. For textbooks, other distributions are similar.
The first step is to wget the tools you need first.
wget http://poptop.sourceforge.net/yum/stable/packages/dkms-2.0.17.5-1.noarch.rpm
wget http://poptop.sourceforge.net/yum/stable/packages/kernel_ppp_mppe-1
The concept of things here no longer repeat, there are too many online, a key installation script also has a lot, but many can not be used, can be used only in the CentOS6 under the use, CentOS7 basically did not see these installation scripts. Then spent some time to toss the test, write this script to facilitate the VPN after the installation of a key to build. The open source package is Openswan and xl2tpd, and there are many problems in the middle
Do not look down, according to use PRITUNL to build VPN server to do relatively simple
The instructions on the Internet are all rubbish, all kinds of chaos. It's a waste of my time.
Installing PPTP server
sudo yum install pptpd-y
Edit
Vim/etc/ppp/chap-secretsJoin a line
User name pptpd Password *Start pptpd
Service PPTPD StartTry to connect to the client, establish a PPTP connection, remember to go to advanced settings, open use MPPE encryption
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
The L2TP tunnel (L2TP tunnel) refers to the logical link between the second-tier Tunneling Protocol (L2TP) endpoints: LAC (L2TP access aggregator) and LNS (L2TP network server). When LNS is a server, LAC is the initiator of the tunnel and waits for the new tunnel. Once a tunnel is established, the new communication between this point will be two-way. In order to be useful to the network, high-level protocols such as Point-to-Point Protocol (PPP) are then passed through the L2TP tunnel.
Today, j
In addition to VPN authentication using the PPP authentication method, here are a few ways to authenticate a VPN.
Chap:chap negotiates a secure form of cryptographic authentication by using MD5, an industry-standard hashing scheme. CHAP uses a challenge-response mechanism and a one-way MD5 hash in response. In this way, you can prove to the server that the client knows the password, but you do not have to
1 Introduction
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Tplink Router VPN Client setting method
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2, according to the Setup wizard to start setting, select Connect to the workspace, the following figure:
3. Select the connection mode
Choose to use my Internet connection (V
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1. Create a connection
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