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Facebook’s historic outage, explained

Kentik

Yesterday the world’s largest social media platform suffered a global outage of all of its services for nearly six hours. Included in the withdrawn prefixes were the IP addresses of Facebook’s authoritative DNS servers, rendering them unreachable. which is routed as 129.134.30.0/24 24 and 129.134.30.0/23.

TCP 145
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How to find applications with NetFlow

Kentik

Perhaps you want to know if the traffic you are investigating is related to video streaming, voice or social media. If you are thinking that those represent HTTP and HTTPS, you would be largely correct, but that doesn’t mean it’s traffic involving web servers. Lots of applications use these ports today, including DNS lookups and email.

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The malware threat landscape: NodeStealer, DuckTail, and more

Engineering at Meta

These malware families – including Ducktail, NodeStealer and newer malware posing as ChatGPT and other similar tools – targeted people through malicious browser extensions, ads, and various social media platforms with an aim to run unauthorized ads from compromised business accounts across the internet.

Cookie 116
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23 Good-To-Know Networking Acronyms and Abbreviations

CATO Networks

SD-WAN Software-Defined Wide Area Network (SD-WAN) is a virtual WAN architecture offering optimized traffic routing over multiple different media (broadband, MPLS, 5G/LTE, etc.). CDN Content Delivery Network (CDN) is a geographically distributed network of servers that serve cached copies of web content.

Network 52
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Error accessing Cisco ASA using ASDM

Network Engineering

inside no snmp-server location no snmp-server contact snmp-server enable traps snmp authentication linkup linkdown coldstart crypto ipsec security-association lifetime seconds 28800 crypto ipsec security-association lifetime kilobytes 4608000 telnet timeout 5 ssh timeout 5 console timeout 0 dhcpd auto_config outside !

VPN 52
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Kentik True Origin Brings CDN Insights to ISPs

Kentik

OTT tagging: Because commercial CDNs deliver traffic for multiple content providers, OTT services can’t be identified based on the server IP in a flow record. Are my subscribers getting content from the nearest possible servers? The destination IP in flow data is matched to the IP from which the DNS query originated.

DNS 56
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What is a TCP Port: Different Between TCP and UDP Ports

NW Kings

A TCP port is a unique number assigned to specific services and applications that run on a server. It serves as an endpoint for communication between a client and the server, allowing different communication processes over a network. This combination directs network traffic to the appropriate service or application running on a server.