| pptpd.conf - PPTP VPN daemon configuration |
| pptpd(8) reads options from this file, usually /etc/pptpd.conf. Most options can be overridden by the command line. The local and remote IP addresses for clients must come from the configuration file or from pppd(8) configuration files. |
| option option-file |
| the name of an option file to be passed to pppd(8) in place of the default /etc/ppp/options so that PPTP specific options can be given. Equivalent to the command line --option option. |
| stimeout seconds |
| number of seconds to wait for a PPTP packet before forking the pptpctrl(8) program to handle the client. The default is 10 seconds. This is a denial of service protection feature. Equivalent to the command line --stimeout option. |
| debug |
| turns on debugging mode, sending debugging information to syslog(3). Has no effect on pppd(8) debugging. Equivalent to the command line --debug option. |
| bcrelay internal-interface |
| turns on broadcast relay mode, sending all broadcasts received on the server's internal interface to the clients. Equivalent to the command line --bcrelay option. |
| localip ip-specification |
| one or many IP addresses to be used at the local end of the tunnelled PPP links between the server and the client. If one address only is given, this address is used for all clients. Otherwise, one address per client must be given, and if there are no free addresses then any new clients will be refused. localip is ignored if pptpd(8) was compiled with --with-pppd-ip-alloc. |
| remoteip ip-specification |
| a list of remote IP addresses to be used on the tunnelled PPP links between the server and the client. There must be at least one IP address per client permitted to connect simultaneously, and preferably some spare addresses. A warning will be sent to syslog(3) when the IP address pool is exhausted. remoteip was ignored if pptpd(8) is compiled with --with-pppd-ip-alloc. |
| noipparam |
| if present, the original client IP address is not to be sent to ip-up scripts using the pppd(8) option noipparam. Equivalent to the command line --noipparam option. |
| listen ip-address |
| the local interface IP address to listen to. Equivalent to the command line --listen option. |
| pidfile pid-file |
| the filename to store the process ID number in. Equivalent to the command line --pidfile option. |
| speed speed |
| specifies a speed (in bits per second) to pass to the PPP daemon as the interface speed for the tty/pty pair. This is ignored by some PPP daemons, such as Linux's pppd(8). The default is 115200 bytes per second, which some implementations interpret as meaning "no limit". Equivalent to the command line --speed option. |
| An ip-specification above (for the localip and remoteip tags) may be a list of IP addresses (for example 192.168.0.2,192.168.0.3), a range (for example 192.168.0.1-254 or 192.168.0-255.2) or some combination (for example 192.168.0.2,192.168.0.5-8). For some valid pairs might be (depending on use of the VPN): |
|
localip 192.168.0.1 remoteip 192.168.0.2-254 |
| or |
|
localip 192.168.1.2-254 remoteip 192.168.0.2-254 |
| Allocate a section of your LAN addresses for use by clients. |
| In /etc/ppp/options.pptpd. set the proxyarp option. In pptpd.conf do not set localip option, but set remoteip to the allocated address range. Enable kernel forwarding of packets, (e.g. using /proc/sys/net/ipv4/ip_forward ). |
| The server will advertise the clients to the LAN using ARP, providing it's own ethernet address. bcrelay(8) should not be required. |
| Allocate a subnet for the clients that is routable from your LAN, but is not part of your LAN. |
| In pptpd.conf set localip to a single address or range in the allocated subnet, set remoteip to a range in the allocated subnet. Enable kernel forwarding of packets, (e.g. using /proc/sys/net/ipv4/ip_forward ). The LAN must have a route to the clients using the server as gateway. |
| The server will forward the packets unchanged between the clients and the LAN. bcrelay(8) will be required to support broadcast protocols such as NETBIOS. |
| Allocate a subnet for the clients that is not routable from your LAN, and not otherwise routable from the server (e.g. 10.0.0.0/24). |
| Set localip to a single address in the subnet (e.g. 10.0.0.1), set remoteip to a range for the rest of the subnet, (e.g. 10.0.0.2-200). Enable kernel forwarding of packets, (e.g. using /proc/sys/net/ipv4/ip_forward ). Enable masquerading on eth0 (e.g. iptables -t nat -A POSTROUTING -o eth0 -j MASQUERADE ). |
| The server will translate the packets between the clients and the LAN. The clients will appear to the LAN as having the address corresponding to the server. The LAN need not have an explicit route to the clients. bcrelay(8) will be required to support broadcast protocols such as NETBIOS. |
| pppd(8), pptpd(8), pptpd.conf(5). |