How to setup site-to-site (router-to-router) PPTP VPN with Buffalo Router using Professional Firmware?

1- Set Router name and Host name to Site1

1. Connect PC to router on site1 and log-in.
2. Go to Basic setup tab and set Router name and host name to site1.
3. Set LAN IP to 192.168.11.1 and Set Subnet Mask to "255.255.255.0" .
4. Click Save.

2- Register with Dynamic DNS service and next setup dynamic IP address: (Example : Site1.dnsdynamic.com )

1. Go to Setup | DDNS and select the supported service was used to registered DDNS service.
2. Enter Service account information : Username, Password and Hostname.
3. Click Save.

3-Setup Routing so all packets are routed to PPTP clients:

1. A. Go to Setup | Advanced Routing
2. In Static Routing section:
3. Set Route Name to "Site2.dnsdynamic.com"
4. Set Metric to "0"
5. Set Destination LAN NET to "192.168.12.0"
6. Set Subnet Mask to "255.255.255.0"
7. Set Gateway to "192.168.12.1"
8. Set Interface to "ANY"
9. Save

4-Setup PPTP Server:

1. Go to "Service" | "VPN" tab
2. Click enable PPTP server Enable option.
   Set enable broadcast option if you are using it for small home/office and/or for special gaming applications.
3. Set DNS1 , DNS2 and WINS IP address.
4. Set Server IP address. This should be a valid IP address in LAN address rang (i.e. 192.168.11.X) .i.e. out side of the DHCP address pool.
   The IP address should be outside of the DHCP address pool. ( in this example DHCP address range is 192.168.11.100 ~ 192.168.11.149)
   Server IP is set to 192.168.11.10.
5. Allocate an address or a list of addresses for client IP . This should be a valid IP address in LAN address rang (i.e. 192.168.11.X) .
   in this example ; 192.168.11.60 or if there are more clients you may specify a range as 192.168.11.60-80 . The IP address should be outside of the DHCP address pool.
6. Assign user name password (CHAP secret)
   in following format : Username * Password *
or (username,blank space,asterisk,blank space,password_to_use,blank space,asterisk)
For example : joe * joespassword *
   
7. Click "Apply Settings"

6- reboot the router. Turn off and back on. alternatively,

1. Go to Administration command shell enter: "reboot" and click run commands.

1- Set Router name and Host name to Site2

1. Connect PC to router on site2 and log-in.
2. Go to Basic setup tab and set Router name and host name to site2.
3. Set LAN IP to 192.168.12.1 and Set Subnet Mask to "255.255.255.0" .
4. Click Save.

2- Register with Dynamic DNS service and next setup dynamic IP address: (Example : Site2.dnsdynamic.com )

1. Go to Setup | DDNS and select the supported service was used to registered DDNS service.
2. Enter Service account information : Username, Password and Hostname.
3. Click Save.

3-Setup Routing so that packets are routed to PPTP Server :

1. Go to Setup | Advanced Routing
2. In Static Routing section:
3. Set Route Name to "Site1.dnsdynamic.com"
4. Set Metric to "0"
5. Set Destination LAN NET to "192.168.11.0"
6. Set Subnet Mask to "255.255.255.0"
7. Set Gateway to "192.168.11.1"
8. Set Interface to "ANY"
9. Click Save Button

4-Setup PPTP Client:

1. Go to "Service" | "VPN" tab
2. Click enable PPTP Client options Enable option.
3. Set Server IP or DNS : Site1.dnsdynamic.com (WAN IP adders of Site1)
4. Set Remote Subnet: 192.168.11.0
5. Set Remote Subnet Mask: 255.255.255.0
6. The following parameters set same as default value :
   Set MPPE Encryption to "mppe required"
   Set MTU to "1450"
   Set MRU to "1450"
   Enable NAT
7. Set Username : Refer to your Server setting for PPTP server user name (Example "joe")
8. Set Password : Refer to your Server setting for PPTP server password (Example "joespassword")
9. Click "Apply Settings"

5- reboot the router. Go to Administration command shell enter: "reboot" and click run commands.