Tuve un problema en una de esas, tuve que instalar un modulo de perl y no podia descargar nada por que estaba conectado a travez de un proxy.
para poder instalar los modulos vamos a hacerlo a travez del cpan
# perl -e shell -MCPAN cpan shell -- CPAN exploration and modules installation (v1.9205) ReadLine support enabled cpan[1]>
y desde ahi le configuramos el proxy
# perl -e shell -MCPAN
cpan shell -- CPAN exploration and modules installation (v1.9205)
ReadLine support enabled
cpan[1]> o conf proxy_user usuario
proxy_user [mfleytas]
Please use 'o conf commit' to make the config permanent!
cpan[2]> o conf proxy_pass pass
proxy_pass [verde100]
Please use 'o conf commit' to make the config permanent!
cpan[3]> o conf ftp_proxy http://proxy.host.domain:3128
ftp_proxy [http://proxy.host.domain:3128]
Please use 'o conf commit' to make the config permanent!
cpan[4]> o conf http_proxy http://proxy.host.domain:3128
http_proxy [http://proxy.host.domain:3128]
Please use 'o conf commit' to make the config permanent!
cpan[5]> o conf commit
commit: wrote '/usr/lib/perl5/5.10.0/CPAN/Config.pm'
cpan[6]> exit
Lockfile removed.
y listo, desde ahi tenemos shell para instalar los modulos perl
# perl -e shell -MCPAN cpan shell -- CPAN exploration and modules installation (v1.9205) ReadLine support enabled cpan[1]> install Date::Calc CPAN: Storable loaded ok (v2.18) Going to read /root/.cpan/Metadata Database was generated on Sat, 18 Jul 2009 22:27:04 GMT CPAN: YAML loaded ok (v0.66) Going to read /root/.cpan/build/ ............................................................................DONE Found 6 old builds, restored the state of 1 Date::Calc is up to date (5.4). cpan[2]> exit Lockfile removed.