Questions tagged [connection]
The connection tag has no usage guidance.
91 questions
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How can you make the most basic version of BTC Nodes/Peer to Peer communication?
I started to work on my version of blockchain, and for that, I read how everything works, and everything made sense. But when I got to Nodes/CConnman/CNode, after reading for a week, I understood most ...
4
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2
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396
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DEFAULT_MAX_PEER_CONNECTIONS for Bitcoin Core is 125 or 130?
DEFAULT_MAX_PEER_CONNECTIONS is set to 125 by default in core to the best of my knowledge. However, I read in The Optech Newsletter #310 that it is 130... could not validate this info anywhere in the ...
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0
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95
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Bitcoin Core Inbound connections (TOR)
I downloaded Bitcoin Core and the synchronization is complete. I am in a double NAT situation (I don't have permission to alter the settings of one of the routers) so in order to receive inbound ...
- 187
2
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1
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125
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I can't get Inbound Connections on my node
So, I've been trying to get Inbound Connections on my node, to no success.
I've got an UmbrelOS 1.1 installed on a RPi5. It's Bitcoin Node app is already set to allow Incoming Connections.
I also went ...
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5
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1
answer
671
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What's a rule of thumb for setting the maximum number of connections?
Connectivity of full nodes varies a lot, ranging from phones with mobile service to servers in data centers. Also, many nodes probably have asymmetric bandwidth.
Assuming the goal of maximizing ...
- 511
1
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1
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469
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I Can't Get Inbound Connections to My Node
I recently set up a Bitcoin Core Node on a Raspberry Pi. It is fully caught up to the chain tip and has 10 outbound connections. I am using bitcoind to configure the node and have not been able to get ...
- 141
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1
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90
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Why do nodes have a maximum peer count?
Why do nodes have a maximum peer count, in other words what could go wrong if each node is connected to all the nodes of the network?
- 115
3
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212
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bitcoin-cli -netinfo not showing incoming ipv4 peers
I was trying to get my bitcoin node to be able to receive ipv4 peers for couple of days, but could not see any incoming peers even tho my port 8333 was open and reachable and to my best knowledge ...
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2
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1
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92
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How do I troubleshoot port accessibility to allow inbound connections on MacOS?
I'm wondering if anyone has experienced anything like this. IPv4 ports seem blocked. I have tried everything to open a port on my Mac but the port seems blocked.
It's like the only port that can be ...
- 331
1
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1
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170
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Low number from getconnectioncount
I have been running my bitcoin node for about 24 hours now and I'm hovering at 54 active connections. However, I thought that I would be at 125. Why is it that I'm not exceeding this number? ...
- 137
1
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838
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Incoming and Outgoing Node Connections
Should I be concerned that I only see "Out" connections, and not "In" connections? What does this mean? Is everything fine, or is there something I'm doing wrong?
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764
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Mempool docker unable to connect to electrum server
I'm having a problem with "connecting" my mempool.space to electrumX server.
My bitcoin core is working fine, electrumX server is fine as well and up to chaintip. I've installed docker and ...
2
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1
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2k
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Really strange issue when trying to connect Sparrow Wallet to Bitcoin Core
I am really loosing my mind on this. I am actually not a technical noob but also not the very best technican. But things like this should actually be very easy for me.
What I want to do: I just want ...
- 21
1
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1
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625
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How to force node to use tor connections, onlynet=onion already
I've followed all these steps
How can I setup Bitcoin to be anonymous with Tor?
I've added onlynet line in my conf file, but all my peers come with ipv4 connection. When I run getnetworkinfo I get ...
2
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1
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174
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Connection to my full node via Python script suddenly fails
I run a mynode full node on a raspi for quite some time now and was playing around with Python scripts to connect and send txs. This worked fine until lately. Turns out the connection establish ...
2
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1
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110
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How can I establish a connection with an IPv4 peer when my node has only IPv6?
I have a channel with someone who only has IPv4. I only have IPv6. How can I redirect the port in my LND to accept IPv4?
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297
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Connection error
i have installed bitcoin node, it was syncing before i went to sleep, i want to know the percentage of the synced, anytime i query on the bitcoin-cli getblockcount ,i get this error "
error: ...
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Why variations in tor onion service incoming node identifcation formats?
With these bitcoin.conf parameters:
proxy=127.0.0.1:9050
listen=1
onlynet=onion
bind=127.0.0.1
externalip=[my 64-char code].onion
[plus 32 addnode=[onion address] entries]
I quickly get 18 outgoing ...
- 347
-1
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1
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314
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Running bitcoind regtest with docker containers
I am running bitcoind regtest locally with the method from this article https://medium.com/ssde/how-to-use-docker-to-setup-multiple-bitcoin-test-nodes-on-your-own-mac-phase-i-8c6e5442c189.
However, ...
2
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2
answers
629
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Only 10 connections on my raspberry pi full node
I'd like to know why I only get 10 connections on my full node?
Is there something missing in the conf file?
$bitcoin-cli -netinfo
Bitcoin Core v0.21.0.0-7d8a10a6f - 70016/Satoshi:0.21.0/
ipv4
ipv6
...
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11
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1
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650
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With peerblockfilters=1 hundreds of "btcwire 0.5.0/neutrino" connections are downloading TB from my Bitcoin node
I run Bitcoin Core 0.21.0 from a data center, unmetered, with compact block filters enabled (blockfilterindex=1 peerblockfilters=1).
Soon after the restart, I get a huge number (140-200) of ...
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325
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Where can I find RPC_User and RPC_Password for my Python Script?
I'm still struggling with this to obtain "rpc_user" and "rpc_password" this is the Python Script
I did try others to fill in others network like Blockdaemon.com but it does not ...
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2
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1
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302
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SPV client TCP connection in python
I am trying to implement an SPV client in python (for my own learning). I want to start by making a simple TCP connection to a full node, but I either cannot get a response to my version message, or ...
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8
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2
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4k
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What exactly does the scary option "Allow incoming connections" do in Bitcoin Core?
Software authors seem to enjoy consciously freaking me out by having vaguely or entirely uncommented options in their software with very ominous labels.
In Bitcoin Core's settings, it says "[X] ...
- 89
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1
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369
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Bitcoin V0.1 Not Connected
My Bitcoin V 0.1 says, "not connected" when I try to generate coins. I have ensured the port is connected through the firewall. Also, I have read that V 0.1.3 corrected this problem. However,...
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536
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Problem connecting on Slush's pool with GUIMiner, i tried many Host adress to connect, every time it says the target computer expressly reject it
I'm on Windows 10 with GUIminer, i want to mine on the slush's pool but every time i enter every host adress i saw it didn't work on slush pool.
I entered the right login for my miner and on ...
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2
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1
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344
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How to achieve fast mempool synchronization at startup?
I just started my 'occasional' full-node and I am watching the size of the mempool grow after full block synchronization - watch -n 3 'bitcoin-cli getrawmempool true |jq "length"' - it has around 4000 ...
- 773
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961
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Bitcoin Core JSONRPC only accept requests with 0.0.0.0 in configs
I've lunched a Bitcoin Core server, and trying to connect to it via JSON-RPC.
This is my configuration settings:
server=1
rpcuser=admin
rpcpassword=password
rpcport=1234
rpcallowip=94.183.32.151
...
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1
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411
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difference between inbound and outbound connection
I'm running a bitcoin full node (bitcoin core) via Tor.
I noticed I have only outbound connections (using maxconnections=16 in the conf file), but not even an inbound one.
So which is exactly the ...
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3
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1
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700
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How does the Bitcoin p2p network work? Does it need port forwarding?
But does every peer node in the bitcoin p2p network need to have ports forwarded in order to participate? Otherwise, how does the p2p network work in the Bitcoin network?
I heard that there are some ...
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327
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Can I connect to a node as read-only?
In my Electrum wallet I can open the Network Window and view Nodes I'm connected to. Here's an example: electrum4101870.fullhealth.net. I can also find public nodes at https://bitnodes.earn.com/nodes/...
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864
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Are nodes that don't accept inbound connections necessarily leechers?
Gavin Andresen and James Lopp seem to think that nodes that don't accept inbound connections could be called "leechers" in the same way a torrent leecher takes but doesn't give (or at least they did 5 ...
- 1,658
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2
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183
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Can a Bitcoin node create an outgoing connection to a inbound node?
I'm trying to figure out if we can create an outgoing connection to a inbound node (a node which we are already connected to, but the remote peer has initiated the connection). I know that this does ...
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868
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Connection Refused when running bitcoind in a non-root user and trying to make RPC calls
I'm new to Bitcoin development and I'm currently having difficulties trying to make RPC calls to a Bitcoin-Core daemon running in a SSH server. I suppose that the problem is with Firewall or closed ...
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197
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Bitcoin Core client on multiple computers
I have one computer with a full node bitcoin core. I would like to have bitcoin-qt installed on a different computer but I don't want to download the full blockchain again in the other computer. I ...
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321
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Why does my public IP show a Bitcoin Node is running when it is set up over Tor?
I've set up my node to run exclusively over TOR. But when I check https://bitnodes.earn.com/ and a few other sites with my public IP to check if a bitcoin node is accepting incoming connections, it ...
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2
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159
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Which peers does a node broadcast a new block to?
In the Bitcoin network, when a miner discovers a new block, he needs to broadcast it to other nodes. Does the node only broadcast to outbound connections or does it broadcast to inbound connections as ...
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Is a peer connection maintained for the life of the node, or is it recreated on every request?
Lets assume we have 2 bitcoin nodes, A and B. A is already up, and B is now coming up. B lists A as a peer node and attempts to establish a connection. A accepts, a handshake is completed and they ...
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1
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1k
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Error connecting to json rpc server
For testing purposes, I need to connect from a web page in my shared hosting account (on the public internet) to my json rpc server which is running on my laptop . So bitcoind is running on my laptop, ...
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116
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Does Bitcoin limit the number of parallel connections from the same IP?
Is there a measure in place to prevent an adversary from connecting to a Bitcoin node many times in parallel, thus saturating its open connection slots?
- 1,430
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How does blockchain ensure that a closed loop in network is not formed?
Suppose there are 9 nodes and each node can connect to 8 other nodes. All these 9 nodes connect to the 8 others. Then when a new node comes where does it connect to in this case? All the current nodes ...
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104
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How can I use raw litecoin protocol to connect to nodes?
I am trying to connect to litecoin nodes using raw protocol. I follow Ken Shirriff instructions from this article . My code works perfect with bitcoin, so I just replaced bitcoin nodes connection ...
- 113
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4k
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Port 8333 and Issues to have a connection
So, I have a website, and that website is going to use Bitcoins. Right now, I'm trying to connect the bitcoin core with the website.
But I have a lot of issues with port 8333:
This is my error: http:...
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4
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1
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362
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Sybil attack countermeasure
In Bitcoin Wiki Weaknesses: Sybil attack they mention that:
"Bitcoin makes these attacks more difficult by only making an outbound connection to one IP address per /16 (x.y.0.0)".
Why would this ...
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117
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Bitcoin core closes inbound connections every 10 minutes
I noticed that Bitcoin core will close incoming connections every 10 minutes. Wireshark captures [FIN, ACK] are received from the node. It looks like Bitcoin core is monitoring the connection time. ...
- 123
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211
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Clarification of some getaddr() function inputs and outputs
In the Bitcoin system to discover new nodes, each node communicates with its peers by sending getaddr() to the peers. Based on the bitcoin implementation:
//! the maximum percentage of nodes to ...
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Why connected node count have dropped since august 1st?
before 1st august i used to connect to 55+ nodes on my bitcoin-core, even if i kept the bitcoin-core running for 12 hours.
but after 1st of august, the connected nodes count is not going above 15-23
...
user10603
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118
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Does bitcoin-core software/client connects with only same version number nodes?
i am trying to connect to maximum number of nodes.
i noticed there are many receive version message in debug.log file
so i have question, does the bitcoin-core connects to only those having either ...
user10603
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1
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828
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Warning: Reducing -maxconnections from 1000 to 865, because of system limitations
I want to be the fastest/first one at recognizing/receiving new transactions, so i set i set these in bitcoin.conf and running a bitcoin full node on dedicated centos server.
maxconnections=1000
...
user10603
2
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1
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299
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How does the network handle changing IPs?
From what I understand, when a node first comes online, it requests a list of known IPs from all of it's peers. I'm assuming that by doing that, it shares its own ip to all of the peers, which in turn ...
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