Nice step by step guide to identify on which layer do you have an issue : Physical, Data Link, Network/Internet or Transport?
tcpcopy - An online request replication tool, also a tcp stream replay tool, fit for real testing, performance testing, stability testing, stress testing, load testing, smoke testing, etc
bpftools - BPF Tools - packet analyst toolkit
tracedump - tcpdump of single programs
In my article detailing the command line utilities available for configuring and troubleshooting network properties on Windows and Linux, I mentioned some Linux tools that, while still included and functional in many Linux distributions, are actually considered deprecated and therefore should be phased out in favor of more modern replacements. Specifically, the deprecated Linux networking…