void (): network

Showing posts with label network. Show all posts

Wednesday, February 05, 2025

RPI network reconnect

to be run */10 * * * * from cron

#!/bin/bash

wlan='wlan0'
gateway='192.168.1.1'

ping -c2 $gateway 2>&1 >/dev/null; rc=$?
if [[ $rc -eq 0 ]] ; then
        echo `date +"%b %d %T "`$0": The network is up."
else
        echo `date +"%b %d %T "`$0": Network down! Attempting reconnection."
        if [ -f /storage/.cache/nonet ]; then
                rm -f /storage/.cache/nonet
                reboot
        fi
        ifdown $wlan
        rmmod brcmfmac
        sleep 2
        modprobe brcmfmac brcmfmac_wcc
        ifup --force $wlan
        sleep 2
        connmanctl connect wifi_dc345a1743d_6e6545675289d3567_managed_psk &>/dev/null
        sleep 10
        ping -c2 $gateway 2>&1 >/dev/null; rc=$?
        if [[ $rc -ne 0 ]] ; then
                echo "1" > /storage/.cache/nonet
        fi
fi
exit 0

Monday, May 04, 2015

dns_adblock

#!/bin/bash
#dns_adblock.sh - poor man's adblock
# (c)2015 sorin@toXX.guru
#replace add servers with a local blank page
#this script works faster/better/cleaner if you have apache httpd configured to serve a null page in case of page not found
#just create an empty file 'touch /var/www/html/null.html', then in /etc/httpd/httpd.conf add/modify the line 'ErrorDocument 404 /null.html'

#define local variables
target=/var/named/data/blacklist
nullzone=/var/named/null.zone.file
namedconf=/etc/named.conf
whitelisted=/var/named/data/whitelisted.personal
blacklisted=/var/named/data/blacklisted.personal
namesrv=192.168.18.100
# if it's the first time we run this, add the right info into bind's configuration
if [ ! -f $nullzone ]; then
echo "\$TTL    86400   ; one day
@       IN      SOA     ads.nodomain. root. (
             2015021505 ; serial
                  28800 ; refresh
                   7200 ; retry
                 864000 ; expiry
                86400 ) ; minimum
            NS      nameserver
               A       $namesrv
@       IN      A       $namesrv
*       IN      A       $namesrv" > $nullzone
fi
if ! grep -q $target $namedconf ; then
echo "conf not found"
echo " include \"$target\";" >> $namedconf
fi

# get the list of known adservers from yoyo.org, sanitize it and make it compatible with bind9
wget -q -O - 'http://pgl.yoyo.org/as/serverlist.php?hostformat=bindconfig&showintro=0' | tail -n+29 | head -n -6 | sed -e 's/{/IN {/g' -e '/_/d' > $target-new

# get a second list from mvps.org, sanitize it and add only the hostnames that were not given by yoyo.org
while read adhost; do
if ! grep -q $adhost $target-new ; then
echo "zone \"$adhost\" IN { type master; notify no; file \"null.zone.file\"; };" >> $target-new
fi
done < <(wget -q -O - http://www.mvps.org/winhelp2002/hosts.txt | sed -e '/^ *#/d;s/#.*//' -e '/^[[:space:]]*$/d' -e '/localhost/d' -e '/_/d' -e '/[\r\n]/d' | cut -d" " -f2 )

# add personal blacklist
blhost="nothing"
sed '/^ *#/d;s/#.*//' $blacklisted | while read blhost; do
if ! grep -q $blhost $target-new ; then
echo "zone \"$blhost\" IN { type master; notify no; file \"null.zone.file\"; };" >> $target-new
fi
done

# remove whitelisted domains. ($wlisted variable have to be defined, otherwise sed might remove everything)
wlisted="nothingatall"
sed '/^ *#/d;s/#.*//' $whitelisted | while read wlisted; do
sed -i /"$wlisted"'/d' $target-new done

#remove duplicates, named is intolerant to multiple definitions for the same host
cat $target-new | sort -u > $target

#cleanup line containing "empty" domain
sed -i '/\"\"/d' $target

# cleanup the last remanents of bad lines reported by named-checkconf
if [ ! $(/usr/sbin/named-checkconf -t /var/lib/named -z /etc/named.conf >/dev/null 2>&1; echo $?) = 0 ]; then
badlines=$(/usr/sbin/named-checkconf -t /var/lib/named -z /etc/named.conf | cut -d: -f2 | sed -e 's/$/d;/' | tr -d '\n')
sed -i "$badlines" $target
fi
rm -f $target-new
# reload bind
/bin/systemctl reload named.service

Sunday, August 10, 2014

Tune UP (in fact down) Windows 2008 R2

sssc config lanmanworkstation depend= bowser/mrxsmb10/nsi
sc config mrxsmb20 start= disabled

netsh int tcp set global rss=disabled
netsh int tcp set global chimney=disabled
netsh int tcp set global autotuninglevel=disabled
netsh int ip set global taskoffload=disablednetsh int tcp set global autotuninglevel=disablednetsh int tcp set global ecncapability=disablednetsh int tcp set global timestamps=disablednetsh advf set allp state off

:: reg add "HKLM\SYSTEM\CurrentControlSet\services\Tcpip\Parameters" /v DisableTaskOffload /t REG_DWORD /d "1" /f

reg add "HKLM\SYSTEM\CurrentControlSet\services\LanmanWorkstation\Parameters" /v DisableBandwidthThrottling /t REG_DWORD /d "1" /f
reg add "HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\WinHttp" /v TcpAutotuning /t REG_DWORD /d "0" /f
reg add "HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings" /v TcpAutotuning /t REG_DWORD /d "0" /f
reg add "HKLM\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Internet Settings" /v TcpAutotuning /t REG_DWORD /d "0" /f
reg add "HKLM\SYSTEM\CurrentControlSet\services\Tcpip\Parameters" /v EnableTCPA /t REG_DWORD /d "0" /f

Sunday, December 22, 2013

Logon Script

@echo off
color 0B
TITLE Initialization de connexion avec le serveur...
echo (c)2012 Xxxxxxxx Inc. Test de la connexion... ^

REM ********** define per location variables *********
set server=myserver
set serverip=123.45.67.89
set group=mygroup
set domain=MYDOMAIN
set mypassword=pass_1234
set maping1=net use X: \\%server%\home\%username% /yes
set maping2=net use W: "\\%server%\Dossier Partages" /yes
set maping3=net time \\%server% /set /yes
set groupmaping=net use Z: \\%server%\specialshare /yes
set vpn=rasdial "VPN connection" %username% %mypassword%
REM ********** end of specific variables *************

REM *** define generic variables ***
set tmpvar=0
set hostspath=%windir%\System32\drivers\etc\hosts
set lmhostspath=%windir%\System32\drivers\etc\lmhosts

REM *** check if the servername is added to hosts file ***
type %hostspath% | find "%server%" 1>nul 2>nul
if errorlevel 1 goto NOTFOUND

REM *** check if the server is accessible. launch vpn first if you have to ***
:FOUND
%vpn%
ping -n 5 %server% | find "TTL" 1>nul 2>nul
IF %ERRORLEVEL% == 0 goto GOOD
IF NOT %ERRORLEVEL% == 0 goto BAD

REM *** if the server is accessible map the drives and launch a second script from server ***
:GOOD
%maping1% 1>nul 2>nul
%maping2% 1>nul 2>nul
%maping3% 1>nul 2>nul
@SET LANG=ENU
@SET FILE_SERVER=%server%
\\%server%\netlogon\oxlogon.bat

REM *** Special settings for members of certain Security Groups ***
for /f %%f in ('"net user /domain %username% | findstr /i %group%"') do set /a tmpvar=1
if %tmpvar% lss 1 goto END
%groupmaping% 1>nul 2>nul
goto END

REM *** if the server is not accessible let the user know ***
:BAD
ECHO Pas de connexion avec HQ. Verifiez le access Internet!
goto END

REM *** if the servername is not into hostfile add it ***
:NOTFOUND
echo. >> %hostspath%
echo %serverip% %server% >> %hostspath%
echo. >> %hostspath%
echo. >> %lmhostspath%
echo %serverip% %server% #PRE #DOM:%domain% >> %lmhostspath%
echo. >> %lmhostspath%
echo Ajout de %server% dans %hostspath%
goto FOUND

REM *** end of script. let the user see the messages for a few seconds, then exit ***
:END
echo C`est fait, Merci!
ping -n 4 -w 1000 1.1.1.1 >nul
exit

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