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Basic Information
The port 8333 is used by Bitcoin nodes in the mainnet to communicate between them.
The port 18333 is used Bitcoin nodes in the testnet to communicate between them.
The port 38333 is used Bitcoin nodes in the signet to communicate between them.
The port 18444 is used Bitcoin nodes in the regtest (local) to communicate between them.
Default port: 8333, 18333, 38333, 18444
PORT STATE SERVICE8333/tcp open bitcoinShodan
port:8333 bitcoinUser-Agent: /Satoshi
Enumeration
Bitcoin nodes will give you some information if they think that you are another valid bitcoin node. Nmap have some script to extract this information:
sudo nmap -p 8333 --script bitcoin-info --script bitcoin-getaddr 170.39.103.39PORT STATE SERVICE8333/tcp open bitcoin| bitcoin-info: | Timestamp: 2022-04-08T22:33:58| Network: main| Version: 0.7.0| Node Id: 1bea074ea4f6eca3| Lastblock: 731027|_ User Agent: /Satoshi:0.19.1/sudo nmap -p 8333 --script bitcoin-getaddr 170.39.103.39PORT STATE SERVICE8333/tcp open bitcoin| bitcoin-getaddr: | ip timestamp| 2a02:c7e:486a:2b00:3d26:db39:537f:59f2:8333 2022-03-25T07:30:45| 2600:1f1c:2d3:2403:7b7d:c11c:ca61:f6e2:8333 2022-04-08T07:16:38| 75.128.4.27:8333 2022-04-02T08:10:45[...]Learn & practice AWS Hacking:HackTricks Training AWS Red Team Expert (ARTE)Learn & practice GCP Hacking: HackTricks Training GCP Red Team Expert (GRTE)
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