Try the following:

1. Lose the IP tables. Install and activate ufw. Then "sudo ufw allow 40000"
2. Put only the following in your .conf file

addnode=112.3.32.41
addnode=113.123.192.18
addnode=113.123.208.222
addnode=114.240.148.65
addnode=118.112.31.11
addnode=118.112.31.14
addnode=118.112.31.3
addnode=118.112.31.5
addnode=118.112.31.6
addnode=118.112.31.9
addnode=118.113.135.42
addnode=119.135.207.175
addnode=119.23.210.14
addnode=119.23.211.233
addnode=119.23.220.145
addnode=119.36.79.132
addnode=120.202.46.63
addnode=123.119.25.243
addnode=138.68.227.166
addnode=139.99.131.169
addnode=159.203.188.228
addnode=162.243.161.213
addnode=162.243.171.195
addnode=171.251.12.198
addnode=174.138.34.137
addnode=174.138.34.54
addnode=174.138.34.64
addnode=174.138.34.71
addnode=174.138.34.81
addnode=174.54.43.236
addnode=182.151.203.19
addnode=182.151.203.62
addnode=185.134.230.158
addnode=188.230.139.163
addnode=198.199.89.94
addnode=198.211.109.101
addnode=202.97.251.251
addnode=207.245.41.195
addnode=208.68.36.193
addnode=218.3.102.1
addnode=218.3.33.86
addnode=221.221.171.175
addnode=221.233.70.237
addnode=222.175.36.134
addnode=58.130.255.101
addnode=67.205.134.62
addnode=67.205.159.108
addnode=67.205.183.9
addnode=67.207.81.139
addnode=67.207.81.222
addnode=67.207.81.58
addnode=67.207.89.62
addnode=67.207.94.159
addnode=77.106.146.9
addnode=77.172.68.14
addnode=83.151.2.66
addnode=93.84.236.241
addnode=97.90.153.65
addnode=97.99.69.33
addnode=99.198.174.212