# Cannot connect to trick.ntp.springer.de
ftp://trick.ntp.springer.de/pub/tex/latex/llncs/latex2e
# file/directory not found
ftp://www.ctan.org/pub/tex-archive/macros/latex2e/contrib/fancyhdr/fancyhdr.pdf
ftp://tug.ctan.org/pub/tex-archive/macros/latex/contrib/caption/caption.pdf
#Net::HTTP: Bad hostname 'math.tulane.edu'
http://math.tulane.edu/~entcs/
# Net::HTTP: Bad hostname 'media.texample.net'
http://media.texample.net/tikz/examples/TEX/free-body-diagrams.tex