OS X & VPN DNS Issue

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# 1  
Old 11-20-2013
OS X & VPN DNS Issue

I'll try and be brief and detailed.

I have a Macbook Pro Retina running Mavericks. When on my network at the office (work) everything local works just fine. Local servers are resolved through our internal DNS settings. For example, we have a fileserver at "fs01". I can connect to it with just that.

So, when I'm not on VPN (PPTP) everything works. When I connect to my VPN, all of my local DNS resolution starts to fail. I can still connect to everything locally using IP's just not names. So, "fs01" is at "" and if I use that I can connect, ping, etc. Ping of the name "fs01" while on VPN returns:

ping: cannot resolve fs01: Unknown host

I've wondered if it was a route issue but since I can get to it via IP I don't think so. It must be a DNS thing. But, my system tells me that it is using the local DNS servers as primary. Here is the output of nslookup server:

josh:~ root# nslookup 
> server
Default server:
Default server:
Default server:

Just in case it will be helpful, here's my routing table:

josh:~ root# netstat -r
Routing tables

Destination        Gateway            Flags        Refs      Use   Netif Expire
default           UGSc           34       19     en5
default           UGScI           1        0     en0
default             UGScI           0        0    ppp0
10/24              ppp0               USc             1        3    ppp0            UHr             1        0    ppp0
10.0.1/24          ppp0               USc             0        0    ppp0
10.141.7/24        link#11            UCS            11        0     en5
10.141.7/24        link#4             UCSI           10        0     en0         link#4             UHLWIir         2        0     en0         0:24:38:c1:a0:0    UHLWIir        36      104     en5    816        3c:7:54:5e:20:34   UHLWI           0        0     en0    859        3c:7:54:5e:20:34   UHLWI           0        0     en5    859        3c:7:54:4b:a3:f4   UHLWI           0        0     en0    778        3c:7:54:4b:a3:f4   UHLWI           0        0     en5    779        98:fe:94:ea:96:49  UHLWI           0        0     en0   1155        98:fe:94:ea:96:49  UHLWI           0        0     en5   1155       30:f7:c5:1c:20:95  UHLWI           0        0     en0   1130       30:f7:c5:1c:20:95  UHLWI           0        0     en5   1130       60:c5:47:23:7a:a9  UHLWI           0        1     en5    778       84:38:35:93:4b:6d  UHLWI           0        0     en0    738       84:38:35:93:4b:6d  UHLWI           0        0     en5    739       28:cf:e9:56:88:87  UHLWI           0        1     en0    846       28:cf:e9:56:88:87  UHLWI           0        0     en5    846       10:dd:b1:b7:12:23  UHLWI           0        0     en0    663       10:dd:b1:b7:12:23  UHLWI           0        1     en5    663       localhost          UHS             0        2     lo0       localhost          UHS             0        0     lo0       68:a8:6d:26:df:b4  UHLWI           0        0     en0    846       68:a8:6d:26:df:b4  UHLWI           0        0     en5    846         UGHS            1     5990     en5
127                localhost          UCS             0        0     lo0
localhost          localhost          UH             11      272     lo0
169.254            link#11            UCS             0        0     en5

Please help! Does anyone know why local dns lookups fail once I connect to the VPN?
# 2  
Old 11-20-2013
Maybe there is a firewall somewhere in the VPN configuration which is blocking?
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