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shalunov@shlang.com
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Hacking Startups

by Stanislav Shalunov, who

• Three paths of B2C startups growth: ads, free ads, and viral
• PHP vs Perl comparison: the Perl view
• RSS feed and comments for my static HTML site
• Mean Delay Considered Harmful
• Net Neutrality: Three Questions
• Threads, Tasks, Coroutines, Processes, and Events
• Google's Summer of Code 2005: Experience of One Mentor
• Musings on Protocol Design
• Ink Test: Archival Properties
• Rigging Press Freedom
• The Second Foot Principle
• TCP over WAN Performance Tuning and Troubleshooting
• TCP Armonk (tcpar)
• Why Inter-domain IP Premium Service Will Fail
• The Temperamental Stock Market (or Inflated Expectations)
• linkknot: You can view it as a dictionary, as a collection of write-ups, or as a (very minor) nuisance to web robots.
• Shopping, including Camping Knives and Best Watches.
• Good Email Use
• No hay Argentina (in Russian)
• Microsoft and Russian policy (in Russian)
• Ny Name: I'm Stanislav or Stas
• Activity cycles: old, but I still work mostly like that
• Who are you and why are you here?

Past projects

• RFC 4656: A One-way Active Measurement Protocol (OWAMP). The IETF standards-track specification of my network measurement protocol. (See also the Internet2 OWAMP reference implementation, BSD-licenced and free to use in open-source and commercial applications.)
• RFC 3763: One-way Active Measurement Protocol (OWAMP) Requirements was written since OWAMP includes its own cryptographic security layer, because of unique security needs of network measurement (e.g., duplicates need to be counted, not thrown out as replay).
• Internet2 NetFlow weekly usage reports for the Abilene network. (How fast is Internet2 from the users' point of view? What is the throughput of a bulk TCP transfer on Internet2? What applications are used?)
• Internet2 Bulk Transport Working Group, co-chair (2005-2006). Building a bulk transport tool that is easy to use on advanced networks, is portable across a wide range of platforms, has high performance, can tolerate minor non-congestive packet loss, applicable to both static file transfer and interactive applications, and is TCP-friendly.
• RFC 4737: Packet Reordering Metrics. I contributed the n-reordering concept.
• GigaTCP machines that could move 700-800Mb/s in a single TCP connection over WANs in 2001.
• QBone Scavenger Service--QoS work on a new network service with incremental deployment properties and voluntary marking (design team chair).
• Random presentations I have given.

Software

stmpclean

A utility to securely clean world-writable scratch directories like /tmp; avoids forking bombs, race conditions, removing special files, etc.

netkill

Denial of Service (DoS) attack exploiting features inherent in TCP. Takes out tens of kilobytes of non-pageable kernel memory per packet exchange (and keeps it for tens of minutes). A dial-up user can take away tens of megabytes of memory from a Linux server using this.

thrulay

Network capacity tester.

nfstat

NetFlow statistics (human-readable reports like the Internet2 NetFlow Weekly Reports from raw NetFlow data).

tcpplot

A TCP throughput dashboard.

conncheck

Network connectivity checker.

kidled

Simple Linux utility to log off idle users.

wu-ftpd-qbss

A patch for WU-FTPD to make it use QBSS for connections of anonymous users.

apache-qbss

A patch for Apache web server to make it use QBSS for large files.

1id-index2fact

Convert Internet Drafts index into an infobot factpack.

factoids

Static factoid files.

uce.el

An Emacs Lisp utility (part of GNU Emacs) to report Unsolicited Commercial Email (UCE). Written in 1996 and didn't change the way it works since; needs a major rewrite. I no longer maintain it, version from the latest GNU Emacs distribution should be used instead. See also what I have to say about reporting spam.

pcnfsd

Heavily patched rpc.pcnfsd daemon, with scores of security holes fixed. Not maintained.

uu_wrap

For UUCP admins: a simple home made utility that can be used instead of `uucico -l'. It allows to use batchmail (UUCP mail compressed in large chunks) and parses Taylor format sys and passwd files. Not maintained.

Friends' projects

• Personal reviews: Marina on children and the kitchen.
• Lemon law firm I helped with the web site.
• Personal news: A cute way to read news tailored just for you. I helped with the AI a bit.