Asagida yer alan script cisco router konfigurasyonlarindan reverse dns kaydi girmek icin gerekli olan bilgileri yorumlar:


register.sh

#!/bin/bash

echo > register.txt
ls *.cfg|while read file
do

host=`echo $file|cut -d"." -f1`



cat $file|grep "ip address"|grep -v "no ip address"|awk '{print $3}'|while read value
do

ipf=`echo $value|cut -d"." -f1`
ips=`echo $value|cut -d"." -f2`
ipt=`echo $value|cut -d"." -f3`
iplast=`echo $value|cut -d"." -f4`
ipall=$ipf.$ips.$ipt


reverse=`echo rev.$ipall|grep -v address`
record=`echo $iplast IN PTR $host.netone.com.tr|grep -v address`

echo $reverse $record. >> register.txt



done



done

Asagida kodu yer alan 2. script ise register.sh scriptinin calismasi sonucu
olusan register.txt içeriğine göre reverse dns dosyalarını oluşturmaktadır.

Örnek register.txt içeriği:

rev.10.150.1 3 IN PTR acbrtr01.sistemodasi.net.
rev.10.150.1 12 IN PTR acbrtr01.sistemodasi.net.
rev.10.150.1 56 IN PTR acbrtr01.sistemodasi.net.


revreg.sh

#!/usr/bin/bash

cat register.txt|while read records

do

search=`echo $records|awk '{print $2}'`
file=`echo $records |awk '{print $1}'`
oldrecord=`grep "^$search IN" $file`
newrecord=`echo $records|awk '{print $2,$3,$4,$5}'`
process=`vim -esnc ":argdo %s/$oldrecord/$newrecord/g" -c ":wq" $file`





done





Not: Scriptlerin işlemesi için vi yerine vim gereklidir.

Bu versşyonda Cisco routerlarin ip adreslerine ait olan interfacelerde bulunmakta ve buna gore reverse dns dosyasi olusturulmaktadır.

reverse.sh

#!/usr/bin/bash


echo > register.txt
ls *.cfg|while read file
do

host=`echo $file|cut -d"." -f1`



cat $file|grep "ip address"|grep -v "no ip address"|awk '{print $3}'|while read value
do

ipf=`echo $value|cut -d"." -f1`
ips=`echo $value|cut -d"." -f2`
ipt=`echo $value|cut -d"." -f3`
iplast=`echo $value|cut -d"." -f4`
ipall=$ipf.$ips.$ipt

match=`cat $file|grep -v "no ip address"|grep -5 "$value"|grep interface|head -1|awk '{print $2}'`



reverse=`echo rev.$ipall|grep -v address`
record=`echo $iplast IN PTR $match-$host.netone.com.tr|grep -v address`

echo $reverse $record. >> register.txt



done



done


Kodun sonucunda oluşan örnek çıktı aşağıda yer almaktadır:

rev.212.154.20 245 IN PTR Serial2/3:1-acbrtr01.netone.com.tr.

Hataları düzeltilmiş son sürüm Cisco konfigürasyon dosyasından:

rev.10.10.19 5 IN PTR sallama-local.netone.com.tr.

şeklinde reverse dns kaydı üreten script.



reverse4.sh

#!/usr/local/bin/bash

echo > register.txt
ls *.cfg|while read file
do

host=`echo $file|cut -d"." -f1`



cat $file|grep interface|grep -v "no ip route"|cut -d":" -f 2,3|grep ^interface|while read value
do

cursor=`nl $file |grep -w "$value"|head -1|awk '{print $1}'`
positiona=`echo $cursor +1|bc`
positionb=`echo $positiona +1|bc`
positionc=`echo $positionb +1|bc`
positiond=`echo $positionc +1|bc`



#Debug
#echo Dosya:$file
#echo Interface:$value
#echo Interface Pozisyonu:$cursor
#echo Pozisyon A:$positiona
#echo Pozisyon B:$positionb
#echo Pozisyon C:$positionc
#echo Pozisyon D:$positiond





location=`echo $file|cut -d"." -f 1`
interface=`echo $value|awk '{print $2}'`



warning=`grep \! $file`
warningb=`nl $file|grep -w " $positionb"|grep \!|wc -c`
warningc=`nl $file|grep -w " $positionc"|grep \!|wc -c`
warningd=`nl $file|grep -w " $positiond"|grep \!|wc -c`


checka=`nl $file |grep -w " $positiona"|grep "ip address"|grep -v no|grep -v peer|wc -c`
ipthreea=`nl $file |grep -w " $positiona"|grep "ip address"|grep -v no|grep -v peer|awk '{print $4}'|cut -d"." -f 1,2,3`
iplasta=`nl $file |grep -w " $positiona"|grep "ip address"|grep -v no|grep -v peer|awk '{print $4}'|cut -d"." -f 4`

checkb=`nl $file |grep -w " $positionb"|grep "ip address"|grep -v no|grep -v peer|wc -c`
ipthreeb=`nl $file |grep -w " $positionb"|grep "ip address"|grep -v no|grep -v peer|awk '{print $4}'|cut -d"." -f 1,2,3`
iplastb=`nl $file |grep -w " $positionb"|grep "ip address"|grep -v no|grep -v peer|awk '{print $4}'|cut -d"." -f 4`

checkc=`nl $file |grep -w " $positionc"|grep "ip address"|grep -v no|grep -v peer|wc -c`
ipthreec=`nl $file |grep -w " $positionc"|grep "ip address"|grep -v no|grep -v peer|awk '{print $4}'|cut -d"." -f 1,2,3`
iplastc=`nl $file |grep -w " $positionc"|grep "ip address"|grep -v no|grep -v peer|awk '{print $4}'|cut -d"." -f 4`

checkd=`nl $file |grep -w " $positiond"|grep "ip address"|grep -v no|grep -v peer|wc -c`
ipthreed=`nl $file |grep -w " $positiond"|grep "ip address"|grep -v no|grep -v peer|awk '{print $4}'|cut -d"." -f 1,2,3`
iplastd=`nl $file |grep -w " $positiond"|grep "ip address"|grep -v no|grep -v peer|awk '{print $4}'|cut -d"." -f 4`


if [ $checka -gt 5 ];then
echo "rev.$ipthreea $iplasta IN PTR $interface-$location.netone.com.tr."
elif [ $warningb -gt 0 ];then
echo > /dev/null
elif [ $checkb -gt 5 ];then
echo "rev.$ipthreeb $iplastb IN PTR $interface-$location.netone.com.tr."
elif [ $warningc -gt 0 ];then
echo > /dev/null
elif [ $checkc -gt 5 ];then
echo "rev.$ipthreec $iplastc IN PTR $interface-$location.netone.com.tr."
elif [ $warningd -gt 0 ];then
echo > /dev/null
elif [ $checkd -gt 5 ];then
echo "rev.$ipthreed $iplastd IN PTR $interface-$location.netone.com.tr."


else
echo > /dev/null
fi



done



done

revreg.sh için bug fix:

#!/usr/bin/bash

cat register.txt|while read records

do

search=`echo $records|awk '{print $2}'`
echo $search
file=`echo $records |awk '{print $1}'`
echo $file
oldrecord=`grep -w "^$search" $file`
echo $oldrecord
newrecord=`echo $records|awk '{print $2,$3,$4,$5}'`
echo $newrecord
process=`vim -esnc ":argdo %s/$oldrecord/$newrecord/g" -c ":wq" $file`



done

Yeni versiyon revreg.sh (Hatasız)

#!/usr/bin/bash

cat register.txt|while read records

do

search=`echo $records|awk '{print $2}'`
echo $search
file=`echo $records |awk '{print $1}'`
echo $file
oldrecord=`grep -w "^$search" $file`
echo $oldrecord
newrecord=`echo $records|awk '{print $2,$3,$4,$5}'`
echo $newrecord
#process=`vim -esnc ":argdo %s/$oldrecord/$newrecord/g" -c ":wq" $file`

rm -rf $file.tmp
cat $file|grep -vw "^$search" >> $file.tmp
echo $newrecord >> $file.tmp
rm -rf $file
mv $file.tmp $file

echo $file dosyasi islenmistir.

reverse.sh

#!/usr/local/bin/bash


echo > register.txt
ls *.cfg|while read file
do

host=`echo $file|cut -d"." -f1`

interface_sayi=`nl $file|grep interface|grep -v Async|wc -l`

echo "$host routerinda $interface_sayi kayit bulunmaktadir."


nl $file|grep interface|grep -v Async|while read perform
do


interface=`echo $perform|awk '{print $3}'`
baslangic_pozisyonu=`echo $perform|awk '{print $1}'`
etki_alan_numarasi1=`echo $perform|awk '{print $1+1}'`
etki_alan_numarasi2=`echo $perform|awk '{print $1+2}'`
etki_alan_numarasi3=`echo $perform|awk '{print $1+3}'`
etki_alan_numarasi4=`echo $perform|awk '{print $1+4}'`
etki_alan_numarasi5=`echo $perform|awk '{print $1+5}'`
etki_alan_numarasi6=`echo $perform|awk '{print $1+6}'`
etki_alan_numarasi7=`echo $perform|awk '{print $1+7}'`

echo
echo "Interface Bilgisi:$perform"
echo "Interface Baslangic Pozisyonu:$baslangic_pozisyonu"
echo "Interface Kapsam Alanlari:"
echo
echo $etki_alan_numarasi1
echo $etki_alan_numarasi2
echo $etki_alan_numarasi3
echo $etki_alan_numarasi4
echo $etki_alan_numarasi5
echo $etki_alan_numarasi6
echo $etki_alan_numarasi7
echo

unlem_alan=`nl $file|egrep "$etki_alan_numarasi1|$etki_alan_numarasi2|$etki_alan_numarasi3|$etki_alan_numara​si4|$etki_alan_numarasi5|$etki_alan_numarasi6|$etki_alan_numarasi7"|grep "\!"|head -1`
echo "Unlem Alani:$unlem_alan"
echo



arama_bolgesi_baslangic=$baslangic_pozisyonu
arama_bolgesi_son=`echo $unlem_alan|awk '{print $1}'`
aranilacak_alan_sayisi=`expr $arama_bolgesi_son - $arama_bolgesi_baslangic - 1`

echo "Arama Bolgesi Baslangic:$arama_bolgesi_baslangic"
echo "Arama Bolgesi Son:$arama_bolgesi_son"
echo "Aranilacak Alan Sayisi:$aranilacak_alan_sayisi"
echo "Aranilan Alanlar:"
echo

baslat=`expr $baslangic_pozisyonu + 1`

for (( i = $baslat ; i < "$arama_bolgesi_son"; i++ ))
do

#echo $i


ip=`nl $file|grep -w $i|grep "ip address"|grep -v peer|grep -v no|grep -v grep|awk '{print $4}'`
ipc=`nl $file|grep -w $i|grep "ip address"|grep -v peer|grep -v no|grep -v grep|wc -l`


if [ $ipc -eq 1 ]
then
echo "$host $interface $ip" >> register.txt
else
echo "ip adresi bulunamamistir." > /dev/null
fi


done




done



done