<p>Yes it will, connection directionality will not affect block and transaction relaying.</p>

CC BY-SA 3.0
2015-06-16T19:15:59.150Z
Thanks for the answer - where can I find out more about this?
Rich Apodaca
CC BY-SA 3.0
2015-06-16T01:22:49.877Z
2015-06-16T01:22:49.877Z
Claris
<p>During a recent discussion, it was asserted that a node running Bitcoin Core behind a firewall with port 8333 closed would still relay blocks/transactions to peers. Unsolicited connections would be blocked due to the closed port, but the node itself would still relay blocks and transactions to any connected peers.</p>

<p>I'm looking for a good resource that settles the issue. Where can I find one?</p>

CC BY-SA 3.0
2015-06-16T00:47:00.853Z
The Bitcoin Core source code would be the ultimate resource...
Nate Eldredge
<bitcoin-core><port><firewall>
If port 8333 is closed, will a node relay transactions to its peers?
Rich Apodaca
# If port 8333 is closed, will a node relay transactions to its peers?

(Asked by: username_0 on 2015-06-15)

During a recent discussion, it was asserted that a node running Bitcoin Core behind a firewall with port 8333 closed would still relay blocks/transactions to peers. Unsolicited connections would be blocked due to the closed port, but the node itself would still relay blocks and transactions to any connected peers.

I'm looking for a good resource that settles the issue. Where can I find one?

**Tags:** bitcoin-core, port, firewall

> **Comments:**
> **username_1**: The Bitcoin Core source code would be the ultimate resource...  

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## 1 answers

### Answer by username_2 on 2015-06-16. Score: 1

Yes it will, connection directionality will not affect block and transaction relaying.

> **Comments:**
> **username_0**: Thanks for the answer - where can I find out more about this?  

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