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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

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

#network #icmp #traceroute #containerlab
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8 min read
VXLAN Explained: An Overlay You Can Read on the Wire
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VXLAN Explained: An Overlay You Can Read on the Wire

#vxlan #network #containerlab #overlay
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8 min read
WireGuard, Seen From Both Sides: The Same Ping as Ciphertext and Cleartext
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WireGuard, Seen From Both Sides: The Same Ping as Ciphertext and Cleartext

#wireguard #vpn #network #containerlab
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9 min read
Mutual TLS Explained: Making the Client Prove Its Identity Too
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Mutual TLS Explained: Making the Client Prove Its Identity Too

#tls #mtls #network #containerlab
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8 min read
DNSSEC in a Container Lab: Sign a Zone, Tamper With It, and Watch the Resolver Say No
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DNSSEC in a Container Lab: Sign a Zone, Tamper With It, and Watch the Resolver Say No

#dns #dnssec #network #containerlab
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11 min read
One Web Request, End to End: Watch curl Cross DNS, TCP, TLS, and HTTP in Order
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One Web Request, End to End: Watch curl Cross DNS, TCP, TLS, and HTTP in Order

#network #dns #tcp #tls
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9 min read
HTTP/1.1 in the Clear: Read One Request and Response Line by Line, Then Watch 304 Save the Day
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HTTP/1.1 in the Clear: Read One Request and Response Line by Line, Then Watch 304 Save the Day

#http #network #containerlab #caching
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8 min read
TLS 1.3 on the Wire: What an Eavesdropper Can Still See Before Encryption Kicks In
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TLS 1.3 on the Wire: What an Eavesdropper Can Still See Before Encryption Kicks In

#tls #network #containerlab #openssl
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8 min read
One TCP Connection, From SYN to FIN: Capture the Whole Lifecycle in tcpdump
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One TCP Connection, From SYN to FIN: Capture the Whole Lifecycle in tcpdump

#tcp #network #containerlab #tcpdump
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10 min read
DNS Caching Explained: Watch TTLs Count Down and NXDOMAIN Get Cached Too
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DNS Caching Explained: Watch TTLs Count Down and NXDOMAIN Get Cached Too

#dns #network #containerlab #bind9
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10 min read
A Network Protocol Learning Roadmap: 42 Hands-On Labs and 151 Code-Reading Sessions, Mapped
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A Network Protocol Learning Roadmap: 42 Hands-On Labs and 151 Code-Reading Sessions, Mapped

#network #protocol #roadmap #python
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3 min read
RPKI Origin Validation: Watch BGP Routes Turn Valid, Invalid, and Not Found
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RPKI Origin Validation: Watch BGP Routes Turn Valid, Invalid, and Not Found

#rpki #bgp #network #containerlab
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8 min read
Competing Origins: When Two ASes Announce the Same Prefix, Who Do You Believe?
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Competing Origins: When Two ASes Announce the Same Prefix, Who Do You Believe?

#bgp #network #containerlab #routeleak
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9 min read
BGP UPDATE in Action: Watch a Route Appear, Disappear, and Come Back
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BGP UPDATE in Action: Watch a Route Appear, Disappear, and Come Back

#bgp #network #containerlab #frrouting
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12 min read
BGP From Scratch: Announce One Prefix and Explain Every Field of the Route
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BGP From Scratch: Announce One Prefix and Explain Every Field of the Route

#bgp #network #containerlab #frr
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12 min read
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