On: Engineers do not get to make startup mistakes when they build ledgers

[alexwasserman]

Typically not a literal pcap. Not just wireshsrk running persistently everywhere.

There are systems you can buy (eg by Pico) that you mirror all traffic to and they store it, index it, and have pre-configured parsers for a lot of protocols to make querying easier.

Think Splunk/ELK for network traffic by packet.

[cjalmeida → alexwasserman]

Except it is literal “pcap” as they capture all packets at layer 3. I don’t know the exact specifications of Pico appliances, but it would not surprise me they’re running Linux + libpcap + some sort of timeseries DB

[alexwasserman → cjalmeida]

Well, probably, but I meant more like it's not typically someone running tcpdump everywhere and someone analyzing with Wireshark, rather than a systems configured to do this at scale across the desktop.

[kelnos → alexwasserman]

I don't think that's what anyone was assuming. A "pcap" is a file format for serialized network packets, not a particular application that generates them.

[hn_version_0023 → alexwasserman]

The Corvil devices used by Pico have IME largely been replaced by Arista 7130 Metamux platforms at the capture “edge”

[HolyLampshade → hn_version_0023]

Which is great for the companies that have made the switch because those corvils were truly terrible.