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Full Discussion: TCP MSS Issue
Special Forums IP Networking TCP MSS Issue Post 302882525 by DGPickett on Tuesday 7th of January 2014 03:15:55 PM
Old 01-07-2014
MSS is related to MTU. I wrote it up very nicely years ago, so look here (come bits are AIX, but much is general):
http://davidgpickett.home.comcast.net/~davidgpickett/tips/
especially:
http://davidgpickett.home.comcast.net/~davidgpickett/tips/tcp_tuning.970513.txt

More modern TCP packets have extended headers, so you get less than 1460 payload from 1500 MTU. The extended header can do buffers over 65K and swap timestamps for tuning. Sometimes a TCP header carries an MTU setting, at least at first.
 

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fntsample(1)						      General Commands Manual						      fntsample(1)

NAME
fntsample - PDF and PostScript font samples generator SYNOPSIS
fntsample [ OPTIONS ] -f FONT-FILE -o OUTPUT-FILE fntsample -h DESCRIPTION
fntsample program can be used to generate font samples that show Unicode coverage of the font and are similar in appearance to Unicode charts. Samples can be saved into PDF (default) or PostScript file. OPTIONS
fntsample supports the following options. --font-file, -f FONT-FILE Make samples of FONT-FILE. --font-index, -n IDX Font index for FONT-FILE specified using --font-file option. Useful for files that contain multiple fonts, like TrueType Collec- tions (.ttc). By default font with index 0 is used. --output-file, -o OUTPUT-FILE Write output to OUTPUT-FILE. --other-font-file, -d OTHER-FONT Compare FONT-FILE with OTHER-FONT. Glyphs added to FONT-FILE will be highlighted. --other-index, -m IDX Font index for OTHER-FONT specified using --other-font-file option. --postscript-output, -s Use PostScript format for output instead of PDF. --svg, -g Use SVG format for output. The generated document contains one page. Use range selection options to specify which. --print-outline, -l Print document outlines data to standard output. This data can be used to add outlines (aka bookmarks) to resulting PDF file with pdfoutline program. --include-range, -i RANGE Show characters in RANGE. --exclude-range, -x RANGE Do not show characters in RANGE. --style, -t "STYLE: VAL" Set STYLE to value VAL. Run fntsample with option --help to see list of styles and default values. --help, -h Display help text and exit. Parameter RANGE for -i and -x can be given as one integer or a pair of integers delimited by minus sign (-). Integers can be specified in decimal, hexadecimal (0x...) or octal (0...) format. One integer of a pair can be missing (-N can be used to specify all characters with codes less or equal to N, and N- for all characters with codes greather or equal to N). Multiple -i and -x options can be used. EXAMPLES
Make PDF samples for font.ttf and write them to file samples.pdf: fntsample -f font.ttf -o samples.pdf Make PDF samples for font.ttf, compare it with oldfont.ttf and highlight new glyphs. Write output to file samples.pdf: fntsample -f font.ttf -d oldfont.ttf -o samples.pdf Make PostScript samples for font.ttf and write output to file samples.ps. Show only glyphs for characters with codes less or equal to U+04FF but exclude U+0370-U+03FF: fntsample -f font.ttf -s -o samples.ps -i -0x04FF -x 0x0370-0x03FF Make PDF samples for font.ttf and save output to file samples.pdf adding outlines to it: fntsample -f font.ttf -o temp.pdf -l > outlines.txt pdfoutline temp.pdf outlines.txt samples.pdf AUTHOR
Copyright (C) 2007 Eugeniy Meshcheryakov <eugen@debian.org> Homepage: <http://fntsample.sourceforge.net/> SEE ALSO
pdfoutline(1) 2010-10-14 fntsample(1)
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