01-01-2017
Are you trying to harden your box for a reason? A lot of linux boxes have special apps to help you. What OS and version of it do you have?
uname -a will show that, so please post it.
No but you can't be too careful. And sometimes my laptop is connected to free WiFi.
I 've got two laptops: ubuntu and debian
1)Linux 4.4.0-57-generic #78-Ubuntu SMP Fri Dec 9 23:46:51 UTC 2016 i686 i686 i686 GNU/Linux
2)Linux 3.16.0-4-amd64 #1 SMP Debian 3.16.36-1+deb8u2 (2016-10-19) x86_64 GNU/LINUX
My point is: you can break all kinds of services without knowing why. And if someone attacks a random port and there is no service behind it to respond, the attacks fails. So no need to block it. This is why attacks go for a lot of known ports. So known ports may require a minor tweak.
You mean I'do better to change default ports rather than block them?
Thanks.
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LEARN ABOUT DEBIAN
cd-drive
CD-DRIVE(1) User Commands CD-DRIVE(1)
NAME
cd-drive - manual page for cd-drive version 0.83 i686-pc-linux-gnu
SYNOPSIS
cd-drive OPTION...
Shows CD-ROM drive characteristics.
DESCRIPTION
-d, --debug=INT
Set debugging to LEVEL
-i, --cdrom-device[=DEVICE]
show only info about CD-ROM device
-q, --quiet
Don't produce warning output
-V, --version
display version and copyright information and exit
Help options:
-?, --help
Show this help message
--usage
Display brief usage message
AUTHOR
Rocky Bernstein rocky@gnu.org
COPYRIGHT
Copyright (C) 2003, 2004, 2005, 2007, 2008, 2011 R. Bernstein
This is free software; see the source for copying conditions. There is NO warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICU-
LAR PURPOSE. Have driver: GNU/Linux ioctl and MMC driver Have driver: cdrdao (TOC) disk image driver Have driver: bin/cuesheet disk image
driver Have driver: Nero NRG disk image driver Default CD-ROM device: /dev/scd0
SEE ALSO
cd-info(1) for information about the CD inside a CD-ROM.
cd-drive version 0.83 i686-pc-linux-gnu October 2011 CD-DRIVE(1)