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Network crashdown RRS feed

  • 質問

  • Hi,

    because of a mistake I disabled and cancelled the current configuration under "Remote Access". (i was configuring a VPN)

    I configured another time but it seems I lost all my configurations and my clients are not able to connect to the server via LAN.

    Can you help me?

    The server has DHCP and DNS role correctly configured, but an ipconfig from my client brings to this:

    2020年6月22日 16:19

すべての返信

  • Hello,

    That's an APIPA address which means your DHCP is not working or your desktop is not able to reach it. Can you be more specific, I am having trouble understanding the situation exactly.

    Remote Access means you are using RRAS & VPN? Are the stations you are not able to get a valid IP address on the local LAN?

    Is the DHCP on a server Windows? If so, make sure the DHCP service is started and the server is authorized.


    Miguel Fra
    Falcon IT Services
    https://www.falconitservices.com

     



    2020年6月22日 17:04
  • The DHCP is in WS2012.

    It's a bit strange because I noticed if I turn off the RRAS, everything is fine.

    When I come back to configure, after completing the wizard and the RRAS is get going, the connection abrutly interrupt and i have to go to the physical server to stop this service. 

    After a restart everything is back to normal.

    With RRAS up, the LAN clients are not able to get the IP from the server. My goal is to configure a standard L2TP VPN


    2020年6月22日 19:37
  • Are you opening ports on your hardware firewall for VPN to access the server or are you using dual NIC configuration in Windows? If you have a front facing router/firewall, make sure that you select the Remote-Access option and not the NAT or VPN with NAT.

    Dual NIC config:

    https://www.falconitservices.com/support/KB/Lists/Posts/Post.aspx?ID=77

    Single NIC Config:

    https://blog.thesysadmins.co.uk/server-2012-pptp-vpn-with-1-nic.html


    Miguel Fra
    Falcon IT Services
    https://www.falconitservices.com

     




    2020年6月22日 22:55
  • Hi,

    The IP 169.254.x.x means that the computer cannot see the network. Please check your DHCP setting and ensure it works fine.

    1. Temporarily disable or reconfigure the firewall: The firewall may end up blocking your computer from the DHCP server. If you can configure it to allow the DHCP server for your network to communicate.
    2. Make sure your network adapter is installed correctly: You can look in the Device Manager (Windows) or System Profiler (Macintosh) to make sure the Ethernet card is listed and functional. You should also check whether the proper driver is installed.
    3. Ensure that DHCP is enabled on your computer: Make sure the setting labeled Obtain an IP address automatically is selected. Also make sure the setting Obtain DNS server address automatically is selected as well.

    Best Regards,

    Cherry


    Please remember to mark the replies as answers if they help.
    If you have feedback for TechNet Subscriber Support, contact tnmff@microsoft.com.

    2020年6月23日 3:14
  • I have 2 NIC, but only one is connected to external:

    And i use the "Ethernet 2" to configure the VPN connection


    2020年6月23日 7:03
  • Hi,

    This article may help you to install VPN using RRAS:

    https://www.accuwebhosting.com/blog/install-vpn-rras-remote-routing-access/

    Please Note: Since the web site is not hosted by Microsoft, the link may change without notice. Microsoft does not guarantee the accuracy of this information.

    Best Regards,

    Cherry


    Please remember to mark the replies as answers if they help.
    If you have feedback for TechNet Subscriber Support, contact tnmff@microsoft.com.

    2020年6月23日 9:42
  • Hi,

     

    Just checking in to see if the information provided was helpful. Please let us know if you would like further assistance.

     

    Best Regards,

    Cherry


    Please remember to mark the replies as answers if they help.
    If you have feedback for TechNet Subscriber Support, contact tnmff@microsoft.com.

    2020年6月29日 1:35
  • Hi,
     
    Just want to confirm the current situations.
    Please feel free to let us know if you need further assistance.
     
    Best Regards,
    Cherry

    Please remember to mark the replies as answers if they help.
    If you have feedback for TechNet Subscriber Support, contact tnmff@microsoft.com.

    2020年7月1日 1:46
  • Hello Andrea,

    From the image you posted it looks like you may be 'double natting'. Set Ethernet 2 with the Static WAN IP and connect to your firewall, set your firewall to transparent mode, open the firewall ports necessary for VPN and then it should work. The natting should be done from Ethernet2 to Ethernet by the Server. Your hardware firewall should not be Natting.

    WAN -> Firewall -> Ethernet2 (WAN IP) -> NAT -> Ethernet (DHCP) -> Switch -> Hosts

    If your hardware firewall is Natting, then make sure to disable Ethernet2 and NAT and just keep Ethernet and DHCP. Then forward VPN ports from hardware firewall to the Ethernet private IP.


    Miguel Fra
    Falcon IT Services
    https://www.falconitservices.com

     



    2020年7月1日 4:11
  • Hi,

     

    As this thread has been quiet for a while, we will propose it as ‘Answered’ as the information provided should be helpful.

     

    If you need further help, please feel free to reply this post directly so we will be notified to follow it up. You can also choose to unmark the answer as you wish.

     

    Best regards,

    Cherry


    Please remember to mark the replies as answers if they help.
    If you have feedback for TechNet Subscriber Support, contact tnmff@microsoft.com.

    2020年7月3日 1:25