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06/11/2009 at 08:55PM PDT, ID: 24485559

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8.6

Shell script to match "host" with list. We need to get this working fast.

Asked by joetac in Bourne Shell (sh), Bourne-Again Shell (bash), Linux Programming

Tags: Linux shell scripting

Here's what I have so far, but it does not work:

The /root/xahost.txt file contains this short list:

googlebot.com
google.com
msn.com
verisign.net

Here's the test version of the script, it is named "xfindhost.sh":

--------------------
#!/bin/bash
ACCEPTED=/root/xahost.txt

if [ $# -ne 1 ]
then
echo "Usage: $(basename $0) [IP address]" >&2
exit 1
fi

if ! host $1 | grep -qf $ACCEPTED
then
# this-is-our-IP-blocking-routine ---> /etc/csf/csf.pl -td $1 600
echo "blocked"
fi

--------------------

I can put in a google.com IP, like this:
./xfindhost.sh 74.125.45.100

Or I can put in the IP address of s spammer in Korea, like this:
./xfindhost.sh 61.247.221.92

And I get the exact same result, that is, the script does not give me the "blocked" echo, so the IP would never be blocked, no matter what.

WHAT WE NEED HERE, is to block the IP address using our firewall blocking routine (/etc/csf/csf.pl -td $1 600) UNLESS it is an IP that reverses out to google.com, googlebot.com, msn.com etc. any of the domains in the xahost.txt file/list.

I am offering 500 points, not necessarily due to the level of difficulty, but because we need a solution really fast. Thanks.

View the Solution FREE for 30 Days

20090824-EE-VQP-74 - Hierarchy / EE_QW_4_20070622

1. Tintin52,870
2. ozo36,303
3. woolmilkp...24,586
4. omarfarid17,114
5. oklit13,480
6. nemws111,800
7. amit_g9,700
8. climbgunks8,260
9. murugesa...7,200
10. ahoffmann7,075
11. dcesari4,960
12. Adam3144,724
13. medvedd4,375
14. oocyte4,336
15. MikeOM_...4,000
15. kawas4,000
17. ghostdog743,400
18. arober113,150
19. FishMonger3,000
20. kolotsey2,648
21. simon32702,532
22. oheil2,500
23. dzamfir2,250
24. fosiul012,200
25. 0ren2,000
25. liddler2,000
25. Tiny30012,000
25. gtkfreak2,000
25. anand_2...2,000
25. Infinity082,000
25. Qlemo2,000
25. Computer...2,000
25. m_mccabe2,000
25. ravenpl2,000
25. theGhost...2,000
25. Gary_Th...2,000
25. ryder07072,000
25. quizengine2,000
25. dolomiti2,000
25. HainKurt2,000
25. neuroburn2,000
25. vikas_ma...2,000
25. jb1dev2,000
25. Cymy2,000

1. Tintin95,170
2. ozo60,678
3. omarfarid30,819
4. woolmilkp...28,596
5. oklit20,680
6. amit_g16,100
7. ahoffmann15,799
8. nemws111,800
9. Adam31411,224
10. murugesa...9,200
11. climbgunks8,260
12. MikeOM_...7,200
13. dcesari4,960
14. ghostdog744,800
15. sunnycoder4,400
16. medvedd4,375
17. oocyte4,336
18. kawas4,000
19. mikelfritz3,250
20. arober113,150
21. FishMonger3,000
21. hernst423,000
23. kolotsey2,648
24. hielo2,600
25. simon32702,532

Shell script to match "host" with list. We need to get this working fast.

Asked by joetac in Bourne Shell (sh), Bourne-Again Shell (bash), Linux Programming

Tags: Linux shell scripting

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