config.ini to "subscribe" to official STEEM TESTNET with high verbosity:

# Console appender definition json: {"appender", "stream"}
log-console-appender = {"appender":"stderr","stream":"std_error"}

# File appender definition json:  {"appender", "file"}
log-file-appender = {"appender":"p2p","file":"logs/p2p/p2p.log"}

# Logger definition json: {"name", "level", "appender"}
log-logger = {"name":"default","level":"debug","appender":"stderr"}
log-logger = {"name":"p2p","level":"info","appender":"stderr"}


log-console-appender = {"appender":"stderr","stream":"std_error"}
log-file-appender = {"appender":"p2p","file":"logs/p2p/p2p.log"}
log-logger = {"name":"default","level":"info","appender":"stderr"}
log-logger = {"name":"p2p","level":"warn","appender":"p2p"}

backtrace = yes
plugin = chain p2p webserver witness database_api network_broadcast_api block_api

shared-file-dir = "blockchain"
shared-file-size = 12G
p2p-endpoint = 0.0.0.0:2001
webserver-http-endpoint = 0.0.0.0:8751
webserver-ws-endpoint = 0.0.0.0:8752

# testnet.steemitdev.com
p2p-seed-node = testnet.steemitdev.com:2001