# FAQ: Upcoming Ethereum Hard Fork

DevFeed: [FAQ: Upcoming Ethereum Hard Fork](<https://devfeed.tech/articles/faq-upcoming-ethereum-hard-fork-16783.md>)

Original publisher: [Read original article](<https://blog.ethereum.org/en/2016/10/18/faq-upcoming-ethereum-hard-fork>)

Author: Hudson Jameson

Published: 2016-10-18T01:05:51Z

Content type: article

Language: en

Sources: [Ethereum Foundation Blog](<https://devfeed.tech/sources/ethereum-foundation-blog.md>)

Topics: [Ethereum](<https://devfeed.tech/topics/ethereum.md>), [Blockchain](<https://devfeed.tech/topics/blockchain.md>), [Network](<https://devfeed.tech/topics/network.md>), [Protocol (disambiguation)](<https://devfeed.tech/topics/protocol.md>), [DDoS](<https://devfeed.tech/topics/ddos.md>), [Transactions](<https://devfeed.tech/topics/transactions.md>)

Tags: [blockchain](<https://devfeed.tech/tags/blockchain.md>), [communication](<https://devfeed.tech/tags/communication.md>), [community](<https://devfeed.tech/tags/community.md>), [consensus](<https://devfeed.tech/tags/consensus.md>), [developers](<https://devfeed.tech/tags/developers.md>), [download](<https://devfeed.tech/tags/download.md>), [ethereum](<https://devfeed.tech/tags/ethereum.md>), [fork](<https://devfeed.tech/tags/fork.md>), [network](<https://devfeed.tech/tags/network.md>), [protocol](<https://devfeed.tech/tags/protocol.md>), [protocol-announcements](<https://devfeed.tech/tags/protocol-announcements.md>), [sha256](<https://devfeed.tech/tags/sha256.md>), [sync](<https://devfeed.tech/tags/sync.md>), [transactions](<https://devfeed.tech/tags/transactions.md>), [upgrade](<https://devfeed.tech/tags/upgrade.md>)

## AI overview

This FAQ explains the planned Ethereum hard fork at block 2463000, including the need for clients to upgrade and the consequences of remaining on the pre-fork chain. It also describes network delays caused by a denial-of-service attack and the protocol changes intended to address it.

## Source excerpt

The Ethereum network will be undergoing a hard fork at block number 2463000, which will likely occur between 12:00 and 13:00 UTC on Tuesday, October 18, 2016. A countdown timer can be seen at https://fork.codetract.io/....