networking
24 posts found
Noise Handshakes for NAT Traversal: Rathole Multiplexing Architecture
An architectural look at how user-space Noise Protocol tunnels avoid TCP-over-TCP breakdown and solve CGNAT ingress bottlenecks.
Your Localhost Server Is Listening on Every Interface
Running python http.server without --bind 127.0.0.1 opens every NIC to incoming connections. localhost in the URL bar does not equal loopback in the kernel.
Linux Nftables Flowtables: Netfilter Fastpath Connection State Gaps
Software flowtables cut CPU load on Linux routers by bypassing Netfilter chains. Here is why established connections ignore live firewall rule updates and how t…
Debugging WireGuard MTU Bottlenecks and TCP MSS Clamping
Why WireGuard connections drop large TCP payloads when ICMP Path MTU Discovery fails, and how to configure MSS clamping and interface MTU limits on Linux gatewa…
Android 17 Encrypted Client Hello Still Leaves Hostnames on the Wire
Android 17 turns ECH on by default, but RFC 9849 only hides SNI. Outer public names, dedicated origin IPs, and missing HTTPS ech= records still leak the destina…
Why SSH Agent Forwarding Exposes Infrastructure Across Jump Hosts
Using ForwardAgent yes exposes your SSH identity to compromised bastion hosts. Use ProxyJump and local signature confirmation to secure multi-hop SSH infrastruc…
Adversary-in-the-Middle Phishing Proxies: How Modern Frameworks Hijack MFA Sessions
Deep technical breakdown of AiTM phishing proxies like Mirage2FA, how they intercept MFA sessions, and the architectural changes needed to neutralize session th…
Securing Inbound Webhooks: HMAC Verification and Replay Attack Defense
Inbound webhooks without cryptographic verification expose backend services to forgery, replay attacks, and resource exhaustion. Here is how to implement HMAC-S…
Hardening Reverse Proxies Against WAF Bypass Vectors
Edge WAF inspection often fails when reverse proxies and backend servers parse HTTP requests differently. Here is a 10-point checklist to secure your edge layer…
Why Docker Bypasses UFW Rules (And How to Fix It)
Docker manipulates iptables FORWARD chains directly, bypassing UFW INPUT rules. Learn why container ports leak to the public internet and how to secure them.