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Old 09-30-2007, 09:07 PM   #1
Registered: May 2007
Distribution: Slackware
Posts: 281

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nmap increase send delay for nmap 4.20

I have 4 computers 2 winxp pro and 2 linux

1 slackware for instance is and second is

when trying to scan localhost udp ports it reveals nicely

or if i do from localhost to specify or from its computer it reveals nicely.

if i want to scan from (both linux machines)for udp for instance

nmap -sU -v
i get
Increasing send delay for from 0 to 50 due to max_successful_tryno increase to 4

Increasing send delay for from 400 to 800 due to 11 out of 11 dropped probes since last increase.

And on Win boxes all UDP ports shows open

how to fix this?

Old 10-02-2007, 12:37 AM   #2
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Registered: Oct 2005
Location: Lithuania
Distribution: Hybrid
Posts: 2,247

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Do you have some sort of firewall installed which enables ICMP filtering?


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