Noah Davids - Publications List

Self published non-Stratus related articles

tshark: The capture file being read can't be written as a "pcapng" file.	June 2019
How can I capture the packet headers but not the data?	December 2017
A shell script to measure the effects of retransmissions	September 2017
How to graph concurrent connections in a packet trace file using tshark and gunplot	June 2016
A Perl script to calculate the delta time between timestamps at the start of a line	May 2016
A shell script to send a ping containing the current date/time as text	September 2015
A Native Windows tool to capture packets (no downloading necessary)	April 2015
A Better Tshark follow stream - A shell and perl script combination to make a better follow stream than the default "-z follow,..." that tshark has.	March 2015
split-pcap.pl - A Perl script to separate the TCP flows in a pcap file	February 2015 March 2016 Updated to handle VLAN tags following the Ethernet header
Calculating TCP throughput and why you cannot rely on Wireshark	November 2014
Why can't I turn Auto-Negotiation off on my Gigabit and 10 Gigabit links?	October 2013
A VBS script to stop a dumpcap (Wireshark) trace when a packet is seen (or not seen) in a tracefile	May 2012
A Perl script to calculate the delta values between 2 or more sets of numbers contained in a file	November 2010 March 2016 Added the separator argument
A Perl script to send a labeling frame for inclusion into a protocol analyzer trace file	May 2010
A JavaScript based script to generate passwords	March 2010
A VBS script to periodically collect network statistics for baselining and trouble shooting Windows systems	May 2009
Secure Web Browsing When You are Away From Home	August 2008
The Limitations of the Ethernet CRC and TCP/IP checksums for error detection	June 2008 September 2015 Updated the link to "Performance of Checksums and CRCs over Real Data November 2017 Updated to explicitedly state that the TCP data is covered by the TCP checksum
Perl script to generate passwords	November 2007
The 7 tests of highly reliable server applications	March 2007
VBS script to ping a host and execute a command if the ping fails	November 2006
Perl script that uses TCP to "ping" a host.	October 2006
VBS script to list all files in a directory tree by size.	September 2006
Password Generation for MS Windows.	September 2006
Using Dummynet to simulate a WAN over a LAN.	January 2006
Instructions for using tcpdump to get a useful network protocol trace.	November 2005
tping is a ping replacement for Microsoft Windows that uses TCP connections instead of ICMP. This is a ZIP file containing some documetation and the EXE file.	May 2005
Instructions for using Microsoft Windows 2000/2003 server Network Monitor. This is a ZIP of a DOC file. The ZIP file 2.5 meg	September 2004
Default TTL values for various OSes and protocols	August 2003 October 2008 updated to remove link to http://www.pmg.com/tip_archive/03_12.htm which no longer seems to be available January 2009 updated with MAC OS X and Netgear FVG318 January 2011 updated with a DELL, 2 Extreme switches, Red Hat 4 update 8 and Ubuntu 10.04 LTS November 2011 updated with Android 3.2.1 April 2016 Added serveral new OSes and versions June 2018 Added Tandem Guardian

Self published Stratus related articles

Command macro to list all processes which have at least 1 STCP device clone locked. Run this when the system reports that you have exceeded your clone limit	January 2013
Command macro and command that together can be used to send a TCP segment mimicking a keep-alive segment from the specified connection every N minutes. The goal is to fool stateful middleware appliances into thinking that the connection is active. This is used when the actual application cannot send its own keep-alive messages	September 2012
Command macro to display process data from a set of processes	July 2010
A macro to dump the TCB and socket meters for all sockets associated with a process (or processes) This keys off of a process name or number	December 2009
A macro to dump the stcp metering data and/or the TCB structure for a socket or sockets based on local or remote IP addresses or port numbers or state This keys off IP address, port number or TCB address	October 2009
A scanner to find all hosts on a local subnet (uses ARP)	March 2009
Monitor netstat output filtering out uninteresting lines	January 2009
Listing processes attached to an STCP TCP socket	November 2008
Anonymizing VOS	October 2008 Feb 2009 updated to include information on the network time protocol daemon
Default port numbers used by Stratus supported server and client applications	October 2008 this is an update of the July 2007 Customer eNewsletter
How to identify and correct Ethernet duplex mismatch problems	August 2008
C program that allows you to log into a remote system via "telnet" and execute commands in a script. Allows execution within a command macro	April 2008
Perl script to match lines from files	Aril 2008 May 2008 updated to allow output to be directed to a file October 2009 updated to all output from a command to be matched
Managing a large output file by creating multiple little output files	Aril 2008
Setting up Stratus STCP SSH to use public key authentication	March 2008
Listing the STCP IP connections (sockets) associated with a process	February 2008
Mapping TCP ports back to a VOS, ftServer, or ftLinux process	December 2007 Sept 2008 updated to include a procedure for VOS STCP UDP ports
Beacon packet to assist in protocol trace synchrontization	November 2007 Updated June 2008 to include source code for MS Windows console application Updated July 2008 to include a link to an MS Windows EXE file
Perl script to take the output from packet_monitor and reformat it for processing into a pcap file.	October 2007 March 2008 updated to handle packet_mionitor release from VOS 14 and earlier
Command macro to loop through interface list doing a netstat -interface.	August 2007
Command macros to display the names of users who are connected to a module via telnetd or sshd, the devices they are connected to and the IP address and port number they are connecting from.	February 2007
Command macro that lists the vterm parameters needed by telnet_msd for a set of vterms defined by a star name	August 2006
Command macro that runs netstat and filters the output for specific strings	July 2006 Updated August 2008 to include a second match string
Command Macro that sets up an output file and runs packet_monitor in a started process sending its output to that file instead of the terminal screen. Also sets up useful arguments and filters	July 2006 October 2007 updated to include all_headers control argument April 2008 updated to include ouput_path and process_name arguments for cycle_output_files
Command Macro to gather STCP interface and Ethernet adapter statistics	April 2006 May 2007 updated
STCP tool that allows you to ping (sort of) when a firewall is blocking pings	May 2004
Writing a server started by STCP's POSIX version of inetd	September 2003
Eliminating Underrun errors on the ftServer	September 2003
The TCP Keepalive feature as implemented under STCP	August 2003 May 2007 Updated to describe stcp-2349 and stcp-2367 and the use of list_stcp_params and set_stcp_param
Dead Gateway Detection on VOS	July 2003
Dead Gateway Detection on ftServer	July 2003
Tools to help monitor STCP and TCP_OS networks and devices	June 2003
The ARP cache (for all 6 TCP stacks)	December 2002 December 2, 2005 Updated to include ARP cache sizes and a little on Linux December 7, 2005 Updated with a some information on Red Hat
How to map TCP ports back to a VOS or ftServer process	December 2002 This article has been updated by Mapping TCP ports back to a VOS, ftServer, or ftLinux process.html

Stratus OpenVOS Blogs

Stratus Customer eNewsletter/Stratus Partner eNewsletter articles

Default port numbers used by Stratus supported server and client applications?	July 2007 An update of this article can be found here
How many sockets can STCP really support and how do you determine the number currently in use?	December 2006 An updated version of socket_count.cm can be found here
Demystifying STREAMS memory	Vol. 12, October 2006
MAC address assignment of ftServer\AE V Series and Continuum\AE network interface adapters	Vol. 11, May 2006
MAC Address Assignment of ftServer System Network Interface Adapters	Vol. 10, January 2006
FTP Issues and Solutions	Vol. 9, October 2005 Updated 06-06-05 to include information about added support for FTP client passive mode in SFTP Updated 06-07-18 to include sftp-248 bug fix information for release 14.7.2ah
Realistic Expectations for your Gigabit Network	Vol. 8, July 2005
VOS File Transfer Options	Vol. 7, April 2005
Assuring a Seamless Ethernet Failover with Proper Switch Configuration	Vol. 6, December 2004 Updated 05-08-30 to include information regarding link issues between the U713 and certain Cisco 6500 blades Updated 05-11-02 to include information about gbe-88 and what releases contain the fixes to gbe-76 and gbe-88 Updated 05-11-07 to include information about sdlmux-129 and multiple switch topologies
Understanding STCP Send and Receive Windows	Vol. 5, October 2004 Updated 07-01-11 to reflect changes made in newer releases Updated 08-05-07 to reflect stcp-1447 and stcp-2387 fixes
Tuning Your MSS	Vol. 4, June 2004

Stratasphere newsletter articles

The Stratasphere newsletter was suppose to come out quarterly but its schedule was less regular. These documents are just the way that I sent them to the Stratasphere editor. Unfortunately my formating varies from file to file. Someday I'll clean things up and make them consistent -- but not today. All these files are Microsoft Word DOC files.

Selecting TCP Port Numbers for Fun, Profit and Reliability	Spring 2002 updated 03-10-21 to reflect changes in STCP made since publication updated 03-11-13 to include FTX 3.3 information updated 05-07-29 to include differences between STCP's TCP and UDP ports updated 05-12-21 to include Linux updated 08-06-27 converted to HTML format and added STCP UDP changes
TCP keep-alive NOT! (STCP keep-alive has changed significantly since this document was written, an updated description of STCP keepalive can be found here)	Winter 2001
Some thoughts on security for the VOS Operating System	Winter 2001
Connection issues with STCP	Summer 2001
The performance impact of packet loss	Spring 2001
Balancing the load, multiple TCP application servers	Summer 2000
DLMUX - fault tolerance for VOS Ethernet Devices	Spring 2000
Why won't my TCP based server start	Winter 2000
The secrets of inetd	Winter 1999/2000
Check the low level Ethernet statistics	Winter 1999/2000
Help, I'm stuck in FIN_WAIT_2 and I can't get out	Winter 1998 (updated 05-07-05 to include STCP information)
Multi-homing is simple	Fall 1998
Full duplex Ethernet - faster Ethernet for a price	Summer 1998
FTX's TCP/IP Environment	Spring 1998
Host name resolution under TCP_OS	Winter 1997
SQE isn't tricky	Fall 1997
Terminals are tricky	Summer 1997
Subnets are Tricky	Spring 1996

Magazine articles on Programming, Networking, and User Environments

About half of these articles where never put on the web, for the ones that were the links I have are no longer valid (as of May 5, 2013). I have scanned in the copies of the articles that I have. I imagine that I am breaking copyright and if asked I will remove the scans; until then here they are.

Netstat Statistics Comparison with Perl original link A link to the scanned pages is here	NaSPA Technical Support February 2004
Dangerous ARPs A link to the scanned pages is here	Sys Admin 3/2003
TCP Programming Gotchas original link A link to the scanned pages is here	Windows Developer Oct 2002
TCP - Either Fast or Efficient A link to the scanned pages is here	Sys Admin 5/2001
Fault Tolerance In Networking - A Walk-Through original link A link to the scanned pages is here	Network Magazine E-zine article September 26, 2000
A field Guide to Loopback plugs original link A link to the scanned pages is here	Data Communications E-zine feature Article April 1, 2000
Analyze This: Six Mistakes To Avoid When Tracing Network Problems original link A link to the scanned pages is here	Data Communications E-zine feature Article Feb 2000
Network Administration for Systems Administrators original link A link to the scanned pages is here	Data Communications E-zine feature Article Jan 2000
The Mailman May Deliver But There Are No Guarantees With TCP original link A link to the scanned pages is here	Data Communications E-zine tutorial Dec 1999
TCP Connection States - A clue to Network Health original link A link to the scanned pages is here	Sys Admin 7/99
IP Forwarding A link to the scanned pages is here	Sys Admin 1/99
When packets collide (significance of Ethernet collisions) A link to the scanned pages is here	Sys Admin 6/98
Interpreting netstat Statistics A link to the scanned pages is here	Sys Admin 5/97
10 Principles for Supportable Application Design A link to the scanned pages is here	PC Techniques Oct/Nov 95
A Drag and Drop Shell A link to the scanned pages is here	Windows/DOS Developers Journal 12/92
How People Use Large Vocabulary Systems There is no scan; It's not quite 100 pages and really isn't all that interesting	Masters Thesis, Arizona State University (May 1988)
Experiences with an Interactive Electronic Meeting Facility (as of May 5th, 2013 the link is still good)	Phoenix Conference on Computers and Communications 1983 (March 1983)

Product Reviews

Lab Test: Redundant Transceivers	Data Communications E-zine feature Article July 5, 2000
Watson, come here (Watson voice recognition API)	Windows Tech Journal 10/97
Personal Digital Assistants: Part 2	IEEE Computer 11/96
Personal Digital Assistants: Part 1	IEEE Computer 9/96
Neatness Counts (PC-Lint 7.0)	Windows Tech Journal 9/96
V.34 Boca Office Communicator Version 1.0	IEEE Computer 2/96
If You've Got It, Flaunt It (demo programs)	Windows Tech Journal 7/95
Atypical mice and related devices	IEEE Computer 6/95
Voice recognition for Windows	IEEE Computer 3/94
The Truth About TCP/IP (Winsock APIs)	Windows Tech Journal 1/94
Nautilus (CD ROM based magazine)	Windows User 3/93
Cursors for Windows 3.1 (mouse cursor replacements)	IEEE Computer 1/93
Smooth Transition (IPC between DOS and Windows)	Windows Tech Journal 10/92
Liana (C++ like language)	IEEE Computer 4/92
Windows programming environments	IEEE Computer 1/92
A Free Form Database Package for Windows	IEEE Software 9/91
A perfect 10 (Super Base 4)	IEEE Computer 12/90
A Window onto your data (Q+E and Windows Filer)	IEEE Computer 9/90
Mitsubishi scanner	IEEE Computer 6/90
Keeping in touch through Windows (comm programs)	IEEE Computer 2/90
Talking computers (voice recognition)	IEEE Computer 10/89
Print Spooler	IEEE Computer 9/89
Can machines help improve your writing skills	IEEE Computer 7/89
A Turbo family portrait	IEEE Computer 2/89

Miscellaneous

Wireless LAN at JFK Airport	January 2018
Pain Scale	May 2016
MRDS/Linus With O. Friesen and R. Brinegar	Relational Database Systems, Analysis and Comparison; Schmidt, J. W. and Brodie, M. L. editors (January 1983).
Seismic Network Analysis and Processing System (SNAPS): System Design and User's Guide for Hypocenter Determination With A. Tarr	U.S. Department of the Interior, Geological Survey, Open File Report 77-268 (June 1977)

This page was last modified on 19-12-01