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pathvector-dev

I build networking tools (netblame, pathwx) and write hands-on protocol labs — BGP to QUIC, all runnable with containerlab. Originals at blog.pathvector.dev

Joined on Jul 10, 2026

Jul 21

ECMP Explained: Two Equal Paths, and the Kernel Hashes Flows Across Them

#bgp #network #containerlab #ecmp

8 min read

Jul 21

CUBIC vs BBR: How Your Congestion Control Choice Changes Throughput 7x on a Lossy Path

#tcp #network #containerlab #bbr

8 min read

Jul 20

Traffic Shaping with a Token Bucket: Cap a 56 Gbit/s Link at 10 Mbit/s Using tc

#qos #network #containerlab #linux

7 min read

Jul 20

Redirects and Cookies: How Stateless HTTP Fakes Having a Memory

#http #network #containerlab #curl

7 min read

Jul 19

Path MTU Discovery: Why Blocking ICMP Makes Big Pages Hang

#mtu #icmp #network #containerlab

8 min read

Jul 19

ARP Explained: How IPv4 Turns an IP Address into a MAC by Shouting at Everyone

#arp #network #containerlab #ipv4

7 min read

Jul 18

DHCP Explained: How a Machine With No IP Address Gets One in Four Messages

#dhcp #network #containerlab #udp

7 min read

Jul 18

GRE Explained: The Layer-3 Tunnel That Wraps Everything and Encrypts Nothing

#gre #network #containerlab #tunneling

7 min read

Jul 17

How traceroute Really Works: TTL, ICMP Time-Exceeded, and Mapping a Path Hop by Hop

#network #icmp #traceroute #containerlab

8 min read

Jul 17

VXLAN Explained: An Overlay You Can Read on the Wire

#vxlan #network #containerlab #overlay

8 min read

Jul 16

WireGuard, Seen From Both Sides: The Same Ping as Ciphertext and Cleartext

#wireguard #vpn #network #containerlab

9 min read

Jul 16

Mutual TLS Explained: Making the Client Prove Its Identity Too

#tls #mtls #network #containerlab

8 min read

Jul 15

DNSSEC in a Container Lab: Sign a Zone, Tamper With It, and Watch the Resolver Say No

#dns #dnssec #network #containerlab

11 min read

Jul 15

One Web Request, End to End: Watch curl Cross DNS, TCP, TLS, and HTTP in Order

#network #dns #tcp #tls

9 min read

Jul 14

HTTP/1.1 in the Clear: Read One Request and Response Line by Line, Then Watch 304 Save the Day

#http #network #containerlab #caching

8 min read

Jul 14

TLS 1.3 on the Wire: What an Eavesdropper Can Still See Before Encryption Kicks In

#tls #network #containerlab #openssl

8 min read

Jul 13

One TCP Connection, From SYN to FIN: Capture the Whole Lifecycle in tcpdump

#tcp #network #containerlab #tcpdump

10 min read

Jul 13

DNS Caching Explained: Watch TTLs Count Down and NXDOMAIN Get Cached Too

#dns #network #containerlab #bind9

10 min read

Jul 12

A Network Protocol Learning Roadmap: 42 Hands-On Labs and 151 Code-Reading Sessions, Mapped

#network #protocol #roadmap #python

3 min read

Jul 12

RPKI Origin Validation: Watch BGP Routes Turn Valid, Invalid, and Not Found

#rpki #bgp #network #containerlab

8 min read

Jul 12

Competing Origins: When Two ASes Announce the Same Prefix, Who Do You Believe?

#bgp #network #containerlab #routeleak

9 min read

Jul 11

BGP UPDATE in Action: Watch a Route Appear, Disappear, and Come Back

#bgp #network #containerlab #frrouting

12 min read

Jul 11

BGP From Scratch: Announce One Prefix and Explain Every Field of the Route

#bgp #network #containerlab #frr

12 min read

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