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5nik
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Posts: 104
Joined: Thu Dec 08, 2011 3:15 am
Location: Czech Republic

Feature request: DHCP for VPN (PPP) links - additional parametres to VPN client

Sun May 15, 2016 12:19 am

Microsoft uses DHCP Info for getting additional parametres to client after established VPN (PPTP and others). Is it possible to add support (answering) for this requests?

Example of DHCP Info packet from Windows client:
Frame 1: 342 bytes on wire (2736 bits), 342 bytes captured (2736 bits)
Ethernet II, Src: 00:00:00_00:00:00 (00:00:00:00:00:00), Dst: 00:00:00_00:00:00 (00:00:00:00:00:00)
Internet Protocol Version 4, Src: 10.0.0.3, Dst: 255.255.255.255
User Datagram Protocol, Src Port: 68 (68), Dst Port: 67 (67)
Bootstrap Protocol (Inform)
    Message type: Boot Request (1)
    Hardware type: Hyperchannel (0x08)
    Hardware address length: 0
    Hops: 0
    Transaction ID: 0xea3be860
    Seconds elapsed: 6
    Bootp flags: 0x0000 (Unicast)
    Client IP address: 10.0.0.3
    Your (client) IP address: 0.0.0.0
    Next server IP address: 0.0.0.0
    Relay agent IP address: 0.0.0.0
    Client address not given
    Server host name not given
    Boot file name not given
    Magic cookie: DHCP
    Option: (53) DHCP Message Type (Inform)
    Option: (61) Client identifier
    Option: (12) Host Name
    Option: (60) Vendor class identifier
    Option: (55) Parameter Request List
        Length: 6
        Parameter Request List Item: (6) Domain Name Server
        Parameter Request List Item: (44) NetBIOS over TCP/IP Name Server
        Parameter Request List Item: (43) Vendor-Specific Information
        Parameter Request List Item: (1) Subnet Mask
        Parameter Request List Item: (249) Private/Classless Static Route (Microsoft)
        Parameter Request List Item: (15) Domain Name
    Option: (255) End
    Padding: 0000000000000000000000000000
More info for example here: http://www.janoszen.com/2012/08/07/in-s ... -solution/
or: http://serverfault.com/questions/574121 ... during-con
 
5nik
Member Candidate
Member Candidate
Topic Author
Posts: 104
Joined: Thu Dec 08, 2011 3:15 am
Location: Czech Republic

Re: Feature request: DHCP for VPN (PPP) links - additional parametres to VPN client

Mon Feb 13, 2017 1:00 am

Does exist any other way how to push routes (for split tunneling) to VPN clients?

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