Massive DDoS attack brings down 25% Of Iranian Internet connectivity
A massive cyberattack has brought down a large portion of the Iranian Internet, according to the experts the national connectivity fell to 75%.
Confirmed: Internet partially shut down #Iran from 11:45 a.m. local time (08:15 UTC); real-time network data show national connectivity fall to 75% after authorities reportedly activated "Digital Fortress" isolation mechanism; incident ongoing 📉
— NetBlocks.org (@netblocks) February 8, 2020
📰 https://t.co/Qb8bxYUT71 pic.twitter.com/bsETg1Sfxb
According to NetBlock, the connectivity issue was observed after the Iranian Government has deployed the “Digital Fortress” (also known as D DEZHFA/Dejfa) which is the national cyber shield.
“Network data from the NetBlocks internet observatory confirm extensive disruption to telecommunication networks in Iran on the morning of Saturday, 8 February 2020 lasting several hours.” reads a post published by NetBlocks.
“Network data show a distinct fall in connectivity with several of Iran’s leading network operators from approximately 11:45 a.m. local time (08:15 UTC) affecting cellular and fixed-line operators. Partial recovery was observed one hour after the initial shutdown but other networks returned some seven hours after the incident onset. National connectivity fell to a low point of 75% of ordinary levels for a period during the morning.”
A spokesperson for Iran’s Telecommunication Infrastructure Company, confirmed via Twitter that a DDoS attack had been “normalized” with the “intervention of the Dzhafa Shield.”
#CyberAttack at 11:44 local time disrupted internet services in #Iran for an hour. The distributed denial-of-service (#DDoS) attack was repelled by Iran’s Digital Fortress (Dejfa in Persian): ICT ministry official. https://t.co/MCxkpngeC2
— Khosro Kalbasi (@KhosroKalbasi) February 8, 2020

I am one of the editors here at www.systemtek.co.uk I am a UK based technology professional, with an interest in computer security and telecoms.