Security?! Post: 8511

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Top Forums UNIX for Advanced & Expert Users Security?! Post 8511 by vancouver_joe on Friday 12th of October 2001 01:05:55 PM

10-12-2001

Registered User

I guess my first step would be to run a port scan on the server.

Second, I would check all my non-user id's, i.e.: htdig, mysql, nfs, etc..., and make sure they don't have a shell script applied against their user id's .

Third, I would check my password policy to ensure that your users can't use simple dictionary names for passwords.

Fourth, I would set up port sentry to keep an eye open for any weird activity, and if you have a spare linux server around and a couple of nic cards, I would activate tcpdump and monitor activity coming into your network for a couple of days (hopefully you've got the space).

Finally, shut down non-required services and try to get your users to use ssh and sftp when/if they connect to the server. That way you can get rid of telnet which, as you likely know, send passwords and userid in the clear.

Anyway, some suggestions for you to think of.

Regards,

VJ

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LEARN ABOUT LINUX

fsck.cramfs

FSCK.CRAMFS(8)                                                 System Administration                                                FSCK.CRAMFS(8)

NAME

       fsck.cramfs - fsck compressed ROM file system

SYNOPSIS

       fsck.cramfs [options] file

DESCRIPTION

       fsck.cramfs is used to check the cramfs file system.

OPTIONS

       -v, --verbose
              Enable verbose messaging.

       -b, --blocksize blocksize
              Use this blocksize, defaults to page size. Must be equal to what was set at creation time. Only used for --extract.

       --extract[=directory]
              Test to uncompress the whole file system. Optionally extract contents of the file to directory.

       -a     This option is silently ignored.

       -y     This option is silently ignored.

       -V, --version
              Display version information and exit.

       -h, --help
              Display help text and exit.

EXIT STATUS

              0      success
              4      file system was left uncorrected
              8      operation error, such as unable to allocate memory
              16     usage information was printed

SEE ALSO

       mount(8), mkfs.cramfs(8)

AVAILABILITY

       The  example  command  is part of the util-linux package and is available from Linux Kernel Archive <https://www.kernel.org/pub/linux/utils
       /util-linux/>.

util-linux                                                          April 2013                                                      FSCK.CRAMFS(8)