Cutting One Round-Trip with Linux TCP Fast Open
Enable TCP Fast Open on Linux to send data in the initial SYN, then verify it with curl and tcpdump before rolling it out.
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Enabling and Validating TCP Fast Open on Linux Servers
Learn when to enable TCP Fast Open, compare the sysctl options, understand the trade‑offs, and apply and verify the setting on a Linux host.
Enabling and Validating TCP BBR on Linux: A Practical Guide
Learn how to activate the BBR congestion‑control algorithm on a Linux host, verify its operation, and benchmark its impact on throughput and latency. The guide covers prerequisites, configuration steps, testing with iperf3, and rollback to a loss‑based algorithm.
How can 10G link be slower to WAN than 1G link, on the same machine?
I'm using the following command to test network speed to my.remote.server , from my workstation: dd if=/dev/random | pv | ssh my.remote.server "dd of=/dev/null" When I set en0 to 10Gb, performance drops significantly (15MB/s upload). But when I set en0 to 1Gb, I get much better results (56MB/s upload). This happens despite the 10Gb link working perfectly in
sshHow to Handle Sudden Burst in New HTTPS Connections?
I've got a fleet of Java Vertx servers behind a load balancer that handles spikey traffic. One minute it may be handling 150k r/m, the next it may be handling 2mm r/m, then right back down to 150k r/m. I'm finding that during these spikes, the entire fleet may become unresponsive for minutes and drop connections, while the cpu and mem pressure on any one box
javaWhat do the following mean: TCP:RA, TCP:FA ,TCP:PA, TCP:S, TCP:SEC
I'm specifically looking for a definition of what the following mean: TCP:RA, TCP:FA ,TCP:PA, TCP:S, TCP:SEC The context is that I'm looking at some pfSense logs which are showing rejected packets by the default deny rule. My understanding is that this can happen from asymmetric network traffic where perhaps a connection is closed before a packet acknowledgi
pfsenseIs it possible to use Traefik to proxy PostgreSQL over SSL?
Motivations I am a running into an issue when trying to proxy PostgreSQL with Traefik over SSL using Let's Encrypt. I did some research but it is not well documented and I would like to confirm my observations and leave a record to everyone who faces this situation. Configuration I use latest versions of PostgreSQL v12 and Traefik v2. I want to build a pure
Memcached 1.6.0 UDP removal: testing integration without production credentials
Goal Validate an application’s memcached integration in a sandbox that does not expose production credentials. Constraints Memcached 1.6.0 dropped the UDP listener and the –U flag, leaving only TCP (plain or TLS) for the binary and ASCII protocols. Legacy clients that default to UDP will fail to connect unless reconfigured. A proxy can translate UDP to TCP,
memcachednetstat showing foreign ports as kubernetes:port. What does this mean?
I am using a Windows 10 Pro machine. When I run netstat , it is showing kubernetes:port as foreign address in active connections. What does this mean? I have checked and there is no kubernetes cluster running on my machine. How do I close these connections? Minikube status: $ minikube status host: kubelet: apiserver: kubectl:
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