S6E4: "Sliding Down a Series of Tubes"

Comments 0

Previous EpisodeNext Episode
Recorded (UTC) Aired (UTC) Editor
2021-04-01 02:39:08 2021-04-11 16:28:55 "Edita"
Format SHA256 GPG Audio File
MP3 ff02375bda3a5aa6d255e4c7f8109e09e88f66b49b6b0b8d6851d16803e896bd click click
OGG 06cceb5dccf587fe6ed9cb50169126e0dcfdd367c27091a29186ede7d223caf7 click click

In this episode, we walk you through the basic procedure for sending a packet (or datagram) from its source to the destination!

Just the Tip

  • Paden talks about LaZagne, which searches for passwords/credentials stored on your local system.
  • He also mentions Ubiquiti’s major compromise and the drama ensuing.


Starts at 25m15s.

I was drinking water. Paden was drinking Murphy’s Stout. Jthan was drinking Busch.

  • A tour of packet/datagram’s path
    • First, imagine you’re a computer.
    • This process is a bit difficult to explain in text. So here are the basic steps:
      • If your target address is a DNS record, you need to first resolve the DNS record.
        • This has its own subset of the following processes (routing, etc.).
      • You now have an IP address of your destination. You can then route to it.
        • There are a couple different routing protocols, like OSPF and BGP.
      • Once you have a route, communication then occurs with your target. Further processes depend on the protocol and software involved:
    • The most important part is that first step – getting DNS resolvers and default gateway. Without having DNS resolvers (typically handled by DHCP for IPv4 and RA and/or DHCPv6 for IPv6), you cannot use domain names/other DNS records. Without a default gateway (again, typically handled by DHCP/RA/DHCPv6), you cannot send (or respond to!) packets from hosts outside of your own subnet (unless you had static routes for every single other network out there).

15 Clams

In this segment, Jthan shares with you a little slice of life. The title is a reference to this video. (2m16s in)

Starts at 52m01s.

Jthan wonders why/how AWS became the default for hosting.


  • Technically a cube has to be the same on all six sides, Paden. ;)
  • The IPv4 ranges reseverved for documentation can be found in RFC 5737. For IPv6, it can be found in RFC 3849.
  • Passive-mode FTP is the one with the random port.


Music Credits
Track Title Artist Link Copyright/License
Intro Remember Floating Mind click CC-BY-NC 4.0
Outro Love In Times Of Plague Noi2er click CC-BY-NC-ND 4.0
(All music is royalty-free, properly licensed for use, used under fair use, or public domain.)



There are currently no comments on this article.


Enter your comment below. Fields marked * are required. You must preview your comment before submitting it.