# The Ethereum network is currently undergoing a DoS attack

DevFeed: [The Ethereum network is currently undergoing a DoS attack](<https://devfeed.tech/articles/the-ethereum-network-is-currently-undergoing-a-dos-attack-16780.md>)

Original publisher: [Read original article](<https://blog.ethereum.org/en/2016/09/22/ethereum-network-currently-undergoing-dos-attack>)

Author: Jeffrey Wilcke

Published: 2016-09-22T16:46:27Z

Content type: news

Language: en

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

Topics: [DDoS](<https://devfeed.tech/topics/ddos.md>), [Ethereum](<https://devfeed.tech/topics/ethereum.md>), [Network](<https://devfeed.tech/topics/network.md>)

Tags: [ddos](<https://devfeed.tech/tags/ddos.md>), [developers](<https://devfeed.tech/tags/developers.md>), [ethereum](<https://devfeed.tech/tags/ethereum.md>), [implementation](<https://devfeed.tech/tags/implementation.md>), [network](<https://devfeed.tech/tags/network.md>), [protocol-announcements](<https://devfeed.tech/tags/protocol-announcements.md>)

## AI overview

The Ethereum network is experiencing a computational DDoS attack involving repeated use of the EXTCODESIZE opcode, which is slowing block processing. The article says there is no consensus failure or memory overload and recommends mining configuration changes as an interim response.

## Source excerpt

URGENT ALL MINERS: The network is under attack. The attack is a computational DDoS, ie. miners and nodes need to spend a very long time processing some blocks. This is due to the EXTCODESIZE opcode, which has a fairly low gasprice but which requires nodes to read state information from...