Setting up Multitech Conduit Gateway for TTN

@Lieutier

For comparison below data for successful data push to TTN using MultiTech:

Logfile:

##### 2015-11-15 09:58:26 GMT #####
### [UPSTREAM] ###
# RF packets received by concentrator: 1
# CRC_OK: 100.00%, CRC_FAIL: 0.00%, NO_CRC: 0.00%
# RF packets forwarded: 1 (29 bytes)
# PUSH_DATA datagrams sent: 1 (253 bytes)
# PUSH_DATA acknowledged: 100.00%
### [DOWNSTREAM] ###
# PULL_DATA sent: 1 (0.00% acknowledged)
# PULL_RESP(onse) datagrams received: 0 (0 bytes)
# RF packets sent to concentrator: 0 (0 bytes)
# TX errors: 0

tcpdump:

11:00:21.627984 IP (tos 0x0, ttl 64, id 18249, offset 0, flags [DF], proto UDP (17), length 280)
    172.16.253.1.42404 > 54.229.214.112.1700: [udp sum ok] UDP, length 252
    0x0000:  4500 0118 4749 4000 4011 3c24 ac10 fd01  E...GI@.@.<$....
	0x0010:  36e5 d670 a5a4 06a4 0104 a17d 0187 7500  6..p.......}..u.
	0x0020:  0080 0000 0000 a050 7b22 7278 706b 223a  .......P{"rxpk":
	0x0030:  5b7b 2274 6d73 7422 3a32 3239 3838 3236  [{"tmst":2298826
	0x0040:  3739 362c 2274 696d 6522 3a22 3230 3135  796,"time":"2015
	0x0050:  2d31 312d 3135 5431 303a 3030 3a32 312e  -11-15T10:00:21.
	0x0060:  3632 3735 3137 5a22 2c22 6368 616e 223a  627517Z","chan":
	0x0070:  312c 2272 6663 6822 3a30 2c22 6672 6571  1,"rfch":0,"freq
	0x0080:  223a 3836 382e 3330 3030 3030 2c22 7374  ":868.300000,"st
	0x0090:  6174 223a 312c 226d 6f64 7522 3a22 4c4f  at":1,"modu":"LO
	0x00a0:  5241 222c 2264 6174 7222 3a22 5346 3131  RA","datr":"SF11
	0x00b0:  4257 3132 3522 2c22 636f 6472 223a 2234  BW125","codr":"4
	0x00c0:  2f35 222c 226c 736e 7222 3a39 2e30 2c22  /5","lsnr":9.0,"
	0x00d0:  7273 7369 223a 2d36 352c 2273 697a 6522  rssi":-65,"size"
	0x00e0:  3a32 392c 2264 6174 6122 3a22 5141 4d70  :29,"data":"QAMp
	0x00f0:  4151 4941 4167 4142 3932 5a49 3739 6d44  AQIAAgAB92ZI79mD
	0x0100:  3931 416f 325a 464e 484b 6743 4458 5a42  91Ao2ZFNHKgCDXZB
 	0x0110:  334b 593d 227d 5d7d                      3KY="}]}

Gateway settings:

"gateway_conf" :                          
    {                                         
            "forward_crc_disabled" : true,
            "forward_crc_error" : false,
            "forward_crc_valid" : true,  
            "gateway_ID" : "008000000000a050",  
            "keepalive_interval" : 12,                    
            "push_timeout_ms" : 120,                      
            "serv_port_down" : 1700,   
            "serv_port_up" : 1700,     
            "server_address" : "54.229.214.112",
            "stat_interval" : 20,
            "synch_word" : 52          
    }

Just to check:
Did you upgrade the packet forwarder to lora-packet-forwarder_1.4.1-r8.16_arm926ejste.ipk as listed in the upgrade instructions?

What is the ping response time to 52.229.214.112?

@gonzalocasas
I think they are using the stock MultiTech binaries. Those are delivered in binary format so enabling debugging is not an option. (Available sources are for an older version of the software)