namecoind can not syc and I can't find a namecoind testnet explore

[EthanHee]

this is my namecoind's version:

root@3a50f9857e37:/# namecoind -version
Namecoin Core Daemon version v0.18.0.0-e2985269b

here is my namecoin.conf:

rpcuser=bitcoinrpc
# generate random rpc password:
#   $ strings /dev/urandom | grep -o '[[:alnum:]]' | head -n 30 | tr -d '\n'; echo
rpcpassword=DXvQsIQlTQzu73q0WdzMvMLsxvhjUX
rpcthreads=4

rpcallowip=172.16.0.0/12
rpcallowip=192.168.0.0/16
rpcallowip=10.0.0.0/8

# we use ZMQ to get notification when new block is coming
zmqpubrawblock=tcp://0.0.0.0:18337
zmqpubrawtx=tcp://0.0.0.0:18337
zmqpubhashtx=tcp://0.0.0.0:18337
zmqpubhashblock=tcp://0.0.0.0:18337

# use 1G memory for utxo, depends on your machine's memory
dbcache=1000

# set maximum BIP141 block weight
blockmaxweight=4000000

addnode=testnet.namecoin.org:18334
addnode=31.45.121.24:18334
addnode=45.33.65.68:18334
addnode=51.68.251.200:18334
addnode=38.133.141.29:18334
addnode=51.75.22.122:18334
addnode=45.33.65.68:18334
addnode=51.68.251.200:18334
addnode=38.133.141.29:18334
addnode=45.33.65.68:18334

[test]
rpcbind=0.0.0.0:18336

[main]
rpcbind=0.0.0.0:8336

here is a part of logs

2020-06-17T06:09:16Z New outbound peer connected: version: 110015, blocks=233351, peer=0
2020-06-17T06:09:17Z New outbound peer connected: version: 110015, blocks=233351, peer=1
2020-06-17T06:09:23Z New outbound peer connected: version: 110015, blocks=233351, peer=2
2020-06-17T06:09:37Z New outbound peer connected: version: 110015, blocks=256760, peer=3
2020-06-17T06:10:29Z New outbound peer connected: version: 110015, blocks=233351, peer=4
2020-06-17T06:11:06Z New outbound peer connected: version: 110015, blocks=233225, peer=5
2020-06-17T06:19:41Z connect() to 38.133.141.29:18334 failed after select(): No route to host (113)
2020-06-17T06:21:11Z New outbound peer connected: version: 110015, blocks=233225, peer=6
2020-06-17T06:24:49Z connect() to 38.133.141.29:18334 failed after select(): No route to host (113)
2020-06-17T06:31:30Z New outbound peer connected: version: 110015, blocks=233225, peer=7
2020-06-17T06:32:29Z Timeout downloading headers from peer=0, disconnecting
2020-06-17T06:32:31Z connect() to 38.133.141.29:18334 failed after select(): No route to host (113)
2020-06-17T06:32:36Z connect() to 38.133.141.29:18334 failed after select(): No route to host (113)
2020-06-17T06:32:51Z New outbound peer connected: version: 110015, blocks=233351, peer=8
2020-06-17T06:37:44Z connect() to 38.133.141.29:18334 failed after select(): No route to host (113)
2020-06-17T06:41:24Z Potential stale tip detected, will try using extra outbound peer (last tip update: 1935 seconds ago)
2020-06-17T06:41:40Z New outbound peer connected: version: 110015, blocks=233225, peer=9

And I can't even find a namecoin testnet chainblock explore

[EthanHee]

sorry ,this is wrong place open the issue