After switching to Fios, name resolution not working anymore.

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frachel
OpenVpn Newbie
Posts: 1
Joined: Fri Oct 06, 2017 1:05 pm

After switching to Fios, name resolution not working anymore.

Post by frachel » Fri Oct 06, 2017 1:17 pm

I have an OpenVPN server up in Azure. I've been connecting fine for months from home (Windows laptop). The Azure network is using a 10.x address space, and my OpenVPN TAP adapter is given a 172.x address. Ever since the switch to Fios from Xfinity a few days ago Ip address are resolving incorrectly (going over the Fios gateway and not the assigned DNS).

Here's all the pertinent info i could think of f:

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Ethernet adapter Ethernet 2:

   Connection-specific DNS Suffix  . : xyz.com
   Description . . . . . . . . . . . : TAP-Windows Adapter V9
   Physical Address. . . . . . . . . : 00-FF-71-33-4A-B1
   DHCP Enabled. . . . . . . . . . . : Yes
   Autoconfiguration Enabled . . . . : Yes
   Link-local IPv6 Address . . . . . : fe80::6d78:d6b1:493d:99e4%12(Preferred)
   IPv4 Address. . . . . . . . . . . : 172.27.240.32(Preferred)
   Subnet Mask . . . . . . . . . . . : 255.255.252.0
   Lease Obtained. . . . . . . . . . : Friday, October 6, 2017 8:26:34 AM
   Lease Expires . . . . . . . . . . : Saturday, October 6, 2018 8:26:34 AM
   Default Gateway . . . . . . . . . :
   DHCP Server . . . . . . . . . . . : 172.27.243.254
   DHCPv6 IAID . . . . . . . . . . . : 134283121
   DHCPv6 Client DUID. . . . . . . . : 00-01-00-01-1E-AC-34-99-20-47-47-CF-3F-29
   DNS Servers . . . . . . . . . . . : 10.6.221.4
                                       10.6.221.5
   NetBIOS over Tcpip. . . . . . . . : Disabled
So you can see I have my 172 address for xyz.com (i changed the domain name to xyz.com just for the forum post)

Ping test:

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C:\Users\frank.rachel>ping ml-mod-app1.xyz.com

Pinging ml-mod-app1.xyz.com [92.242.140.21] with 32 bytes of data:
Obviously “92.242.140.21” is wrong, it should be a 10.x address since all the servers I have at xyz.com are 10.x

IPv4 route print:

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C:\Users\frank.rachel>route print
===========================================================================
Interface List
28...00 ff b0 0b 90 b2 ......Juniper Network Connect Virtual Adapter
14...20 47 47 cf 3f 29 ......Hyper-V Virtual Ethernet Adapter
32...20 47 47 cf 3f 29 ......Intel(R) Ethernet Connection (3) I218-LM
12...00 ff 71 33 4a b1 ......TAP-Windows Adapter V9
11...94 65 9c 6e cd ae ......Bluetooth Device (Personal Area Network)
  1...........................Software Loopback Interface 1
  2...00 00 00 00 00 00 00 e0 iphttpsinterface
29...00 00 00 00 00 00 00 e0 Microsoft Teredo Tunneling Adapter
10...00 00 00 00 00 00 00 e0 Microsoft ISATAP Adapter #2
22...00 00 00 00 00 00 00 e0 Microsoft ISATAP Adapter #6
===========================================================================

IPv4 Route Table
===========================================================================
Active Routes:
Network Destination        Netmask          Gateway       Interface  Metric
          0.0.0.0          0.0.0.0      192.168.1.1    192.168.1.152     25
        10.6.44.0    255.255.252.0     172.27.240.1    172.27.240.32    101
        10.6.56.0    255.255.252.0     172.27.240.1    172.27.240.32    101
       10.6.216.0    255.255.248.0     172.27.240.1    172.27.240.32    101
     13.92.198.56  255.255.255.255      192.168.1.1    192.168.1.152     25
        127.0.0.0        255.0.0.0         On-link         127.0.0.1    331
        127.0.0.1  255.255.255.255         On-link         127.0.0.1    331
  127.255.255.255  255.255.255.255         On-link         127.0.0.1    331
     172.27.224.0    255.255.240.0     172.27.240.1    172.27.240.32    101
     172.27.240.0    255.255.252.0         On-link     172.27.240.32    291
    172.27.240.32  255.255.255.255         On-link     172.27.240.32    291
   172.27.243.255  255.255.255.255         On-link     172.27.240.32    291
      192.168.1.0    255.255.255.0         On-link     192.168.1.152    281
    192.168.1.152  255.255.255.255         On-link     192.168.1.152    281
    192.168.1.255  255.255.255.255         On-link     192.168.1.152    281
        224.0.0.0        240.0.0.0         On-link         127.0.0.1    331
        224.0.0.0        240.0.0.0         On-link     192.168.1.152    281
        224.0.0.0        240.0.0.0         On-link     172.27.240.32    291
  255.255.255.255  255.255.255.255         On-link         127.0.0.1    331
  255.255.255.255  255.255.255.255         On-link     192.168.1.152    281
  255.255.255.255  255.255.255.255         On-link     172.27.240.32    291
===========================================================================
Persistent Routes:
  None
Nslookup showing default server:

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C:\Users\frank.rachel>
C:\Users\frank.rachel>nslookup
Default Server:  FIOS_Quantum_Gateway.fios-router.home
Address:  192.168.1.1

>
i can get to my servers by IP, so the VPN connection is working, but anything by name isn't using the DNS on the TAP adapter (10.6.221.4,10.6.221.5)

again, this has worked fine for months, no changes client or server side except my switch to Fios..

Any ideas?

TinCanTech
OpenVPN Protagonist
Posts: 11137
Joined: Fri Jun 03, 2016 1:17 pm

Re: After switching to Fios, name resolution not working anymore.

Post by TinCanTech » Fri Oct 06, 2017 6:40 pm


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