Cannot resolve hostname

mynameismevin

Hey guys

When I try to connect using the Windows client, I get this error:

Thu Sep 22 23:11:46 2016 OpenVPN 2.3.12 x86_64-w64-mingw32 [SSL (OpenSSL)] [LZO] [PKCS11] [IPv6] built on Aug 23 2016
Thu Sep 22 23:11:46 2016 Windows version 6.2 (Windows 8 or greater) 64bit
Thu Sep 22 23:11:46 2016 library versions: OpenSSL 1.0.1t  3 May 2016, LZO 2.09
Thu Sep 22 23:11:46 2016 MANAGEMENT: TCP Socket listening on [AF_INET]127.0.0.1:25340
Thu Sep 22 23:11:46 2016 Need hold release from management interface, waiting...
Thu Sep 22 23:11:46 2016 MANAGEMENT: Client connected from [AF_INET]127.0.0.1:25340
Thu Sep 22 23:11:47 2016 MANAGEMENT: CMD 'state on'
Thu Sep 22 23:11:47 2016 MANAGEMENT: CMD 'log all on'
Thu Sep 22 23:11:47 2016 MANAGEMENT: CMD 'hold off'
Thu Sep 22 23:11:47 2016 MANAGEMENT: CMD 'hold release'
Thu Sep 22 23:11:50 2016 MANAGEMENT: CMD 'password [...]'
Thu Sep 22 23:11:50 2016 WARNING: this configuration may cache passwords in memory -- use the auth-nocache option to prevent this
Thu Sep 22 23:11:50 2016 Socket Buffers: R=[65536->65536] S=[65536->65536]
Thu Sep 22 23:11:50 2016 MANAGEMENT: >STATE:1474607510,RESOLVE,,,
Thu Sep 22 23:11:50 2016 RESOLVE: Cannot resolve host address: ***.dynamic.reboot3times.org: No such host is known. 
Thu Sep 22 23:11:50 2016 MANAGEMENT: >STATE:1474607510,RESOLVE,,,
Thu Sep 22 23:11:50 2016 RESOLVE: Cannot resolve host address: ***.dynamic.reboot3times.org: No such host is known.

I'm not sure why it can't resolve it, dig and nslookup both can resolve:

c:\Program Files\ISC BIND 9\bin>dig ***.dynamic.reboot3times.org

; <<>> DiG 9.10.4-P2 <<>> ***.dynamic.reboot3times.org
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 41944
;; flags: qr rd ra; QUERY: 1, ANSWER: 1, AUTHORITY: 0, ADDITIONAL: 1

;; OPT PSEUDOSECTION:
; EDNS: version: 0, flags:; udp: 512
;; QUESTION SECTION:
;***.dynamic.reboot3times.org. IN   A

;; ANSWER SECTION:
***.dynamic.reboot3times.org. 59 IN A       x.x.238.4

;; Query time: 106 msec
;; SERVER: 172.16.1.1#53(172.16.1.1)
;; WHEN: Thu Sep 22 21:58:11 Pacific Daylight Time 2016
;; MSG SIZE  rcvd: 77

c:\Program Files\ISC BIND 9\bin>nslookup ***.dynamic.reboot3times.org
Server:         172.16.1.1
Address:        172.16.1.1#53

Non-authoritative answer:
Name:   ***.dynamic.reboot3times.org
Address: *.*.238.4

My client config file:

client
dev tun
proto tcp6
remote ***.dynamic.reboot3times.org 1194
resolv-retry infinite
remote-cert-tls server
nobind
persist-key
persist-tun
verb 3
pkcs12 D:\\{cert}.p12

What would cause my Windows client to not find that specific hostname, even though Chrome and my host can resolve the hostname?

TinCanTech

From your windows client try to ping your host name while openvpn is not running.

(Your post has been edited for your privacy)

mynameismevin

TinCanTech wroteFrom your windows client try to ping your host name while openvpn is not running.

That works fine.

C:\Users\me>ping ***.dynamic.reboot3times.org

Pinging boulder.dynamic.reboot3times.org [174.***.238.4] with 32 bytes of data:
Reply from 174.***.238.4: bytes=32 time<1ms TTL=64
Reply from 174.***.238.4: bytes=32 time<1ms TTL=64
Reply from 174.***.238.4: bytes=32 time<1ms TTL=64
Reply from 174.***.238.4: bytes=32 time<1ms TTL=64

Ping statistics for 174.***.238.4:
    Packets: Sent = 4, Received = 4, Lost = 0 (0% loss),
Approximate round trip times in milli-seconds:
    Minimum = 0ms, Maximum = 0ms, Average = 0ms

TinCanTech

TinCanTech wroteMy client config file:

proto tcp6

Delete this ..

mynameismevin

Ah, that fixed it a bit, thanks.