One, installed on centos5 following installation pptpd simplest installation just download the RPM package pptpd-1.3.4-1.rhel5.1.i386.rpm, then direct implementation of rpm – ivhpptpd-1.3.4-1.rhel5.1.i386.rpm.
Fortunately this package does not have other dependencies, therefore installation should be the exception. If you use a source install ppp version occurs, having high remove pppd2.3.4 then install pppp2.4.3, but trouble. After you install the rpm package, automatically generated several configuration file, main configuration file options file/etc/ppp/options.pptpd/etc/pptpd.conf,, account file/etc/ppp/chap-secrets. behind configuration pptpd mainly on these files being modified. Second, vpn topology vpn access logically exist three network: 1, wish to access the aim network. Usually in the vpn server is located on the internal network (the VPN server has two network cards, one is a public network and one private network) 2, Vpn's public network. 3, a VPN connection with the client after the formation of the virtual network. Proposed separate sets a network so that it doesn't take up a private network behind the vpn (destination network) IP resources/address. Of course a VPN tunnel network with destination network is the same network segment, however this is not recommended.
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