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linux:ubuntu:hardening [2008/11/27 12:09] a created FIXME |
linux:ubuntu:hardening [2009/07/23 15:17] (current) 193.164.137.40 |
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| FIXME!! | FIXME!! | ||
| + | |||
| + | links: http:// | ||
| + | ** | ||
| System Hardening Checklist | System Hardening Checklist | ||
| Line 126: | Line 129: | ||
| 15. Chmod dangerous file | 15. Chmod dangerous file | ||
| + | < | ||
| chmod 700 /bin/ping | chmod 700 /bin/ping | ||
| chmod 700 / | chmod 700 / | ||
| Line 139: | Line 143: | ||
| chmod 700 / | chmod 700 / | ||
| chmod 700 / | chmod 700 / | ||
| + | </ | ||
| 16. Specify TTY Devices Root is allowed | 16. Specify TTY Devices Root is allowed | ||
| vi / | vi / | ||
| Leave only two connections: | Leave only two connections: | ||
| - | tty1 | + | tty1 |
| - | tty2 | + | |
| 17. Choose a secure password | 17. Choose a secure password | ||
| Line 150: | Line 155: | ||
| vi / | vi / | ||
| change the detail from this: | change the detail from this: | ||
| - | password requisite pam_unix.so nullok obscure md5 | + | password requisite pam_unix.so nullok obscure md5 |
| to | to | ||
| - | password requisite pam_unix.so nullok obscure md5 min=6 | + | password requisite pam_unix.so nullok obscure md5 min=6 |
| Change min=6 with your company password policy length. | Change min=6 with your company password policy length. | ||
| 18. Checking for Rootkits | 18. Checking for Rootkits | ||
| Install it from Ubuntu Repository: | Install it from Ubuntu Repository: | ||
| - | # apt-get install chkrootkit | + | # apt-get install chkrootkit |
| You can run it with the following command: ./ | You can run it with the following command: ./ | ||
| Now we are going to add it to contrab to schedule daily automatic scans in the system: | Now we are going to add it to contrab to schedule daily automatic scans in the system: | ||
| vi / | vi / | ||
| - | # | + | # |
| - | # Enter the directory where the rootkit is installed | + | |
| - | cd / | + | |
| - | # Enter your email address where you want to receive the report | + | |
| - | ./ | + | |
| Now change the file permissions so we can run it: chmod 755 / | Now change the file permissions so we can run it: chmod 755 / | ||
| Line 176: | Line 181: | ||
| To get a quick overview of the current configuration in the /proc/sys directory type: sysctl –a | To get a quick overview of the current configuration in the /proc/sys directory type: sysctl –a | ||
| Now let’s harden our sysctl.conf file | Now let’s harden our sysctl.conf file | ||
| - | vi / | + | vi / |
| and paste the hardened kernel variable (attached). | and paste the hardened kernel variable (attached). | ||
| Line 184: | Line 189: | ||
| Turn off some of this variable: | Turn off some of this variable: | ||
| - | allow_call_time_pass_reference = Off | + | allow_call_time_pass_reference = Off |
| - | magic_quotes_gpc = Off | + | |
| - | register_long_arrays = Off | + | |
| - | register_argc_argv = Off | + | |
| - | allow_url_fopen = Off | + | |
| - | expose_php = Off | + | |
| - | disable_functions = symlink, | + | |
| - | proc_open, | + | |
| - | escapeshellarg, | + | |
| - | apache_get_modules, | + | |
| - | apache_getenv, | + | |
| 21. Apache Hardening | 21. Apache Hardening | ||
| Line 213: | Line 214: | ||
| Hardened Kernel Variable ( / | Hardened Kernel Variable ( / | ||
| + | < | ||
| # Controls the System Request debugging functionality of the kernel | # Controls the System Request debugging functionality of the kernel | ||
| kernel.sysrq = 0 | kernel.sysrq = 0 | ||
| Line 311: | Line 312: | ||
| # Increase the maximum amount of option memory buffers | # Increase the maximum amount of option memory buffers | ||
| net.core.optmem_max = 57344 | net.core.optmem_max = 57344 | ||
| - | Posted by Last King of Kho's Kingdom at 8:44 PM | + | </ |
