...
"Maybe you can add the following ones as well:
addnode=185.150.190.19
addnode=178.223.55.155:53184
addnode=185.79.5.221:53014
addnode=145.239.189.106:53042
addnode=178.221.183.154:9715
addnode=46.0.192.98:60366
addnode=94.25.174.181:39989
They are all up to date, but the majority of them are not on the standard ports, that's why maybe we have issues to connect to them.
Don't know whether it's the right thing to add the port in the slimcoin.conf specifically.
I'm restarting my server with this new addnode lines to see whether it will sync. (The local wallet hasn't started yet)."
Generally spoken, connections on non-standard ports are (in 99.9% cases) incoming to the respective node, most often these are wallets behind firewalls or with
listen=0 that do not allow incoming connections and you see the port they are connecting from.
When compiling nodes lists, one should IMHO filter to those with
"inbound": false, as these are definitely listening nodes to which your node connected. That is not to say all others are not listening, but only from those to which your node connected you can be sure of it.
Also knowing one connected listening node is generally enough as it informs your node about all the other nodes it knows about.
From the 8 nodes my node is connected to, only one is
inound: false, all others are incoming connections. I guess there are just not so much listening nodes around right now.