ping
March 4, 2017 — 16:01
Author: silver  Category: linux  Comments: Off

When trying to ping as non root user you might get the following error:

ping: icmp open socket: Operation not permitted

There are several ways to fix this:

reinstall pkg (debian):

$ sudo apt-get install --reinstall iputils-ping

(sets cap)

manually set cap:

$ sudo setcap cap_net_raw+ep /bin/ping
$ sudo setcap cap_net_raw+ep /bin/ping6
$ sudo getcap /bin/ping
$ sudo getcap /bin/ping6

needs kernel config:
CONFIG_EXT4_FS_SECURITY=y

dont use SOCK_RAW:

socket(PF_INET, SOCK_DGRAM, PROT_ICMP)

$ cat /proc/sys/net/ipv4/ping_group_range
$ sysctl net.ipv4.ping_group_range
  • “1 0” default, nobody except root
  • “100 100” single group
  • “0 2147483647” everyone (max gid)
$ sysctl net.ipv4.ping_group_range = "0 2147483647"


/etc/sysctl.d/local.conf
net.ipv4.ping_group_range=0 2147483647

suid:

chmod +s /usr/ping
chmod +s /usr/ping6
Anti-Malware Software
March 4, 2017 — 15:55
Author: silver  Category: windows  Comments: Off

Windows Anti-Malware Software:

Linux Audit
March 4, 2017 — 15:43
Author: silver  Category: linux  Comments: Off

First make sure “auditd” is started

add rules:

auditctl -a always,exit -S all -F path=/etc/passwd -F key=config1
auditctl -w /etc/passwd -p rwa -k config2

del rules:

auditctl -d always,exit -S all -F path=/etc/passwd -F key=config1
auditctl -W /etc/passwd -p rwa -k config2

(or restart auditd)

make permanent:

add rules to /etc/audit/rules.d/audit.rules

show results:

ausearch -ts today -k config1
aureport -k

disable audit logs:

systemctl mask systemd-journald-audit.socket
Start program if not already running
March 3, 2017 — 12:55
Author: silver  Category: windows  Comments: Off

Check if a program if not already running before starting it in a Windows batch file.
Uses C:\Windows\System32\find.exe (findstr should work equally well).

Example:

tasklist /nh /fi "imagename eq explorer.exe" | find /i "explorer.exe" > nul || ( start "" C:\WINDOWS\explorer.exe )

Function:

:func_runImageTask
  tasklist /nh /fi "imagename eq %~1" | find /i "%~1" > nul || ( start "" "%~2" )
GOTO :EOF

Function using window titles:

:func_runTitleTask
  tasklist /v | find "%~1" > nul || ( start "" "%~2" )
GOTO :EOF

Call function:

CALL :func_runImageTask "Calculator.exe" "C:\WINDOWS\System32\calc.exe"
CALL :func_runTitleTask "Calculator" "C:\WINDOWS\System32\calc.exe"

From:

  • http://superuser.com/questions/654088/start-programs-via-command-line-but-only-if-not-already-running
  • http://stackoverflow.com/questions/162291/how-to-check-if-a-process-is-running-via-a-batch-script
  • http://stackoverflow.com/questions/15449034/batch-program-to-to-check-if-process-exists

    •  

     

    This batch file takes program names (IMAGENAMES variable) or window titles (WINDOWTITLES and starts them if they are not already running. Programs can have arguments (e.g. outlook.exe).

    ReOpen.bat

    ::
:: ReOpens programs which are not already running 20161220 slv
::

@echo off
setLocal EnableDelayedExpansion

::
:: Configure programs here making sure to use ,^ at eol for continuation
::

SET IMAGENAMES=^
 "chrome.exe,C:\Program Files (x86)\Google\Chrome\Application\chrome.exe",^
 "Xshell.exe,C:\Program Files (x86)\NetSarang\Xshell 5\Xshell.exe",^
 "outlook.exe,C:\Program Files\Microsoft Office\Office14\OUTLOOK.EXE,/recycle"

FOR %%x in (%IMAGENAMES%) DO (
  FOR /f "tokens=1-3 delims=," %%a in (%%x) do (
    CALL :func_runImageTask "%%a" "%%b" "%%c"
  )
)

SET WINDOWTITLES=^
  "[email protected],C:\Program Files (x86)\PuTTY\putty.exe,-load webserver",^
  "[email protected],C:\Program Files (x86)\PuTTY\putty.exe,-load debian"

FOR %%x in (%WINDOWTITLES%) DO (
  FOR /f "tokens=1-3 delims=," %%a in (%%x) DO (
    CALL :func_runTitleTask "%%a" "%%b" "%%c"
  )
)

GOTO :EOF

:func_runImageTask
  tasklist /nh /fi "imagename eq %~1" | %windir%\system32\find.exe /i "%~1" > nul || ( start "" "%~2"^ %~3 )
GOTO :EOF

:func_runTitleTask
  tasklist /v | %windir%\system32\find.exe "%~1" > nul || ( start "" "%~2"^ %~3 )
GOTO :EOF

::
:: Examples:
::
:: MANUAL: tasklist /nh /fi "imagename eq explorer.exe" | %windir%\system32\find.exe /i "explorer.exe" > nul || ( start "" C:\WINDOWS\explorer.exe C:\Users\%USERNAME%\Desktop )
:: FUNCTION: CALL :func_runImageTask "Calculator.exe" "C:\WINDOWS\System32\calc.exe"
::