VPN cannot resolve host address

[Kevin_Yealink]

(04-19-2018 12:25 PM)edrobal Wrote:  Hello.
I'm trying to configure a VPN connection for a W52P. Voip server has a dynamic IP so the remote address is xxxxx.dyndns.biz and the VPN cannot resolve host address. Why phone don't receive dns server from DHCP ?
<29>Apr 19 00:00:08 openvpn[910]: OpenVPN 2.2.1 arm-linux [SSL] [LZO2] [EPOLL] built on Nov 24 2015
<28>Apr 19 00:00:08 openvpn[910]: NOTE: OpenVPN 2.1 requires '--script-security 2' or higher to call user-defined scripts or executables
<29>Apr 19 00:00:08 openvpn[910]: Control Channel Authentication: using '/config/openvpn/keys/ta.key' as a OpenVPN static key file
<29>Apr 19 00:00:08 openvpn[910]: Outgoing Control Channel Authentication: Using 160 bit message hash 'SHA1' for HMAC authentication
<29>Apr 19 00:00:08 openvpn[910]: Incoming Control Channel Authentication: Using 160 bit message hash 'SHA1' for HMAC authentication
<29>Apr 19 00:00:08 openvpn[910]: Control Channel MTU parms [ L:1557 D:166 EF:66 EB:0 ET:0 EL:0 ]
<29>Apr 19 00:00:09 openvpn[910]: Socket Buffers: R=[110592->200000] S=[110592->200000]
<27>Apr 19 00:00:09 openvpn[910]: RESOLVE: Cannot resolve host address: cocktail.dyndns.biz: [HOST_NOT_FOUND] The specified host is unknown.
<29>Apr 19 00:00:09 openvpn[910]: Data Channel MTU parms [ L:1557 D:1450 EF:57 EB:4 ET:0 EL:0 ]
<29>Apr 19 00:00:09 openvpn[910]: Local Options hash (VER=V4): 'ed844052'
<29>Apr 19 00:00:09 openvpn[910]: Expected Remote Options hash (VER=V4): '8a244582'
<27>Apr 19 00:00:09 openvpn[952]: RESOLVE: Cannot resolve host address: cocktail.dyndns.biz: [HOST_NOT_FOUND] The specified host is unknown.

I capture ip trafic and wireshark doesn't show any dns request. Strange.

Dear Customer,

For this case, can you send you openVPN.tar file to us? We can remote connect to do more troubleshooting. And please also send me PCAP, log, config.bin files to me.

BTW, please kindly confirm：
1. How many phones are affected by this issue?
2. Please tell me the W52P firmware.

Best Regards,
Kevin