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Re: Cygwin unable to resolve hostnames
- From: Carl-Erik Kopseng <carlerik at gmail dot com>
- To: cygwin at cygwin dot com
- Date: Fri, 11 Dec 2015 02:18:33 -0800
- Subject: Re: Cygwin unable to resolve hostnames
- Authentication-results: sourceware.org; auth=none
- References: <CAPohr29Vzd0N8+WsJHpK1tPHjFf+3rtxWUQAyOFqnCdCLZcMcw at mail dot gmail dot com> <mop2jp$kkn$5 at ger dot gmane dot org>
> > I'm not sure when this started, but recently Cygwin has been unable to
> > resolve (certain) hostnames.
> >
> > Example:
> > wget github.com
> > --2015-07-22 15:17:04-- http://github.com/
> > Resolving github.com (github.com)... failed: Non-recoverable failure
> > in name resolution.
[snip]
I have the same problem and I have just made a clean Cygwin64 install
on a computer that has never had Cygwin installed before. I have not
messed with any settings, yet I also cannot use curl or git to access
almost any site. Only the built-in Windows CLI tools, such as `ping`,
works.
> > Any ideas?
>
> Cygwin by default uses the same resolution as Windows, that means that
> you have something in Cygwin's configuration that affects resolution.
> First and most obvious is /etc/resolv.conf; by default I don't think
> there is one, but you can create it and Cygwin will use it.
Pointers on what to actually put in that file?
> Next would be if you have more than one DNS resolver in your (Windows)
> network configuration, this means that any one of them can be used at
> any time (literally it should be random)... and by coincidence Cygwin is
> using one that doesn't work, the Web browser is using another, and
> things change with different tests. Run 'ipconfig -all' and see under
> the network adapter what's listed for "DNS Servers".
>
> Also if there is more than one network adapter something similar to the
> last paragraph will happen. I would think that Cygwin uses the DNS
> servers on the "default" adapter.
I am guessing my problems have something to do with this part, as I am
running Windows 8.1 in VMWare. VMWare adds lots of weird network stuff,
all of which I am not too familiar with ...
The below output is from `ipconfig /all`. Could any of the info be put
in the aforementioned resolv.conf file?
Windows IP Configuration
Host Name . . . . . . . . . . . . : macbookpro
Primary Dns Suffix . . . . . . . :
Node Type . . . . . . . . . . . . : Hybrid
IP Routing Enabled. . . . . . . . : No
WINS Proxy Enabled. . . . . . . . : No
DNS Suffix Search List. . . . . . : localdomain
Ethernet adapter Bluetooth Network Connection 2:
Media State . . . . . . . . . . . : Media disconnected
Connection-specific DNS Suffix . :
Description . . . . . . . . . . . : Bluetooth Device (Personal Area
Network) #2
Physical Address. . . . . . . . . : 00-50-56-E2-FB-E9
DHCP Enabled. . . . . . . . . . . : Yes
Autoconfiguration Enabled . . . . : Yes
Ethernet adapter Ethernet0:
Connection-specific DNS Suffix . : localdomain
Description . . . . . . . . . . . : Intel(R) 82574L Gigabit Network
Connection
Physical Address. . . . . . . . . : 00-0C-29-6A-39-52
DHCP Enabled. . . . . . . . . . . : Yes
Autoconfiguration Enabled . . . . : Yes
Link-local IPv6 Address . . . . . : fe80::20b9:f45e:9310:3f4a%9(Preferred)
IPv4 Address. . . . . . . . . . . : 192.168.244.145(Preferred)
Subnet Mask . . . . . . . . . . . : 255.255.255.0
Lease Obtained. . . . . . . . . . : Friday, December 11, 2015 10:59:56
Lease Expires . . . . . . . . . . : Friday, December 11, 2015 11:29:56
Default Gateway . . . . . . . . . : 192.168.244.2
DHCP Server . . . . . . . . . . . : 192.168.244.254
DHCPv6 IAID . . . . . . . . . . . : 167775273
DHCPv6 Client DUID. . . . . . . . : 00-01-00-01-1A-89-39-FB-14-10-9F-E1-7B-95
DNS Servers . . . . . . . . . . . : 192.168.244.2
Primary WINS Server . . . . . . . : 192.168.244.2
NetBIOS over Tcpip. . . . . . . . : Enabled
Tunnel adapter Teredo Tunneling Pseudo-Interface:
Connection-specific DNS Suffix . :
Description . . . . . . . . . . . : Teredo Tunneling Pseudo-Interface
Physical Address. . . . . . . . . : 00-00-00-00-00-00-00-E0
DHCP Enabled. . . . . . . . . . . : No
Autoconfiguration Enabled . . . . : Yes
IPv6 Address. . . . . . . . . . . :
2001:0:5ef5:79fb:867:2876:3f57:b6e(Preferred)
Link-local IPv6 Address . . . . . : fe80::867:2876:3f57:b6e%7(Preferred)
Default Gateway . . . . . . . . . : ::
DHCPv6 IAID . . . . . . . . . . . : 218103808
DHCPv6 Client DUID. . . . . . . . : 00-01-00-01-1A-89-39-FB-14-10-9F-E1-7B-95
NetBIOS over Tcpip. . . . . . . . : Disabled
Tunnel adapter isatap.localdomain:
Media State . . . . . . . . . . . : Media disconnected
Connection-specific DNS Suffix . : localdomain
Description . . . . . . . . . . . : Microsoft ISATAP Adapter #2
Physical Address. . . . . . . . . : 00-00-00-00-00-00-00-E0
DHCP Enabled. . . . . . . . . . . : No
Autoconfiguration Enabled . . . . : Yes
Regards
Carl-Erik Kopseng
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