I've started to implement my bitcoin client to learn the protocol and faced a problem to see debugging output. When I start bitcoind with -debug option, it start to print so many debug messages in such speed that i can't see whats wrong with my client implementation. How can I start the bitcoind program in such way that it will not sync and just listen to new connections from local machine?

1 Answer 1



bitcoind -bind= -connect=
  • strange, when im doing -connect= it opens only port 8332, but without this option it also opens 8333 port. I believe that commands like "VERSION" i should send to 8333 port because 8332 doesn't answer me at all.
    – Anderson
    Dec 12, 2013 at 14:37
  • You're right. It seems that it goes in RPC mode. Adding -listen=1 enables 8333. If that doesn't work. bitcoind -bind= should do it. Let what works for you.
    – Sev
    Dec 12, 2013 at 14:59
  • I meant bitcoind -bind= -connect=
    – Sev
    Dec 12, 2013 at 15:07
  • 1
    I found another method, run the bitcoind as usual and add firefwall rule sudo iptables -A OUTPUT -p tcp --out-interface wlan0 --dport 8333 -j DROP
    – Anderson
    Dec 13, 2013 at 15:16

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