by Erica Naone MIT Technology Review Experts warn that the software could identify those it claims to protect.* A software tool designed to help dissidents circumvent government censorship of the Internet contains flaws so severe that it could endanger those who use it. The tool, called Haystack, has won awards and praise for enabling political [...]
Hi Team,
I need to know why ppl use If true loop instead of just writing down the sequence of code lines.
1:
echo "Line1"
if true; then
echo "Line2"
fi
echo "Line3"
2:
echo "Line1"
echo "Line2"
echo "Line3"
Could you explain what does the if true loop make difference in 1st compare... (3 Replies)
Hi
I need help with a script to loop unitl the statement is true
done some thing like this
until
if
then
cp filename filename.anto
fi
done
Regards, (3 Replies)
Hallo everybody
I am having a shell script called auto_run.sh in that only the first line works.
the second line which has sed command is working only at the # prompt. not within the shell script. What could be the reason.
*... sed 's/ //g' KTI >abc works in another shell script without the... (6 Replies)
I have heard for a long time that in maybe 2039 Unix will no longer be useable due the length of the date value. Anyone know anything about this? (4 Replies)
ok, i know the syntax that goes along with the Shutdown command... but my box never wants to ... well... shutdown.. it only halts, kills all the process's, stalls the comp to a complete stop, but does actually kill the monitor and/or shut off the physical computer. it will reboot properly though,... (3 Replies)
OPIEACCESS(5) File Formats Manual OPIEACCESS(5)NAME
[/etc/]opieaccess - OPIE database of trusted networks
DESCRIPTION
The opieaccess file contains a list of networks that are considered trusted by the system as far as security against passive attacks is
concerned. Users from networks so trusted will be able to log in using OPIE responses, but not be required to do so, while users from net-
works that are not trusted will always be required to use OPIE responses (the default behavior). This trust allows a site to have a more
gentle migration to OPIE by allowing it to be non-mandatory for "inside" networks while allowing users to choose whether they with to use
OPIE to protect their passwords or not.
The entire notion of trust implemented in the opieaccess file is a major security hole because it opens your system back up to the same
passive attacks that the OPIE system is designed to protect you against. The opieaccess support in this version of OPIE exists solely
because we believe that it is better to have it so that users who don't want their accounts broken into can use OPIE than to have them pre-
vented from doing so by users who don't want to use OPIE. In any environment, it should be considered a transition tool and not a permanent
fixture. When it is not being used as a transition tool, a version of OPIE that has been built without support for the opieaccess file
should be built to prevent the possibility of an attacker using this file as a means to circumvent the OPIE software.
The opieaccess file consists of lines containing three fields separated by spaces (tabs are properly interpreted, but spaces should be used
instead) as follows:
Field Description
action "permit" or "deny" non-OPIE logins
address Address of the network to match
mask Mask of the network to match
Subnets can be controlled by using the appropriate address and mask. Individual hosts can be controlled by using the appropriate address
and a mask of 255.255.255.255. If no rules are matched, the default is to deny non-OPIE logins.
SEE ALSO opie(4), opiekeys(5), opiepasswd(1), opieinfo(1), opiesu(1), opielogin(1), opieftpd(8)AUTHOR
Bellcore's S/Key was written by Phil Karn, Neil M. Haller, and John S. Walden of Bellcore. OPIE was created at NRL by Randall Atkinson, Dan
McDonald, and Craig Metz.
S/Key is a trademark of Bell Communications Research (Bellcore).
CONTACT
OPIE is discussed on the Bellcore "S/Key Users" mailing list. To join, send an email request to:
skey-users-request@thumper.bellcore.com
7th Edition January 10, 1995 OPIEACCESS(5)
