RE: Termination problem?

["Sina Bahram" <sbahram () nc rr com>]

Tcp port 0 is only valid/addressible on the local machine I believe;
however, I look forward to being corrected on this.

Try -p 1-65535 ... Or actually, simply do -p- for all ports.

Take care,
Sina 

-----Original Message-----
From: nmap-dev-bounces () insecure org [mailto:nmap-dev-bounces () insecure org]
On Behalf Of Hadmut Danisch
Sent: Monday, December 19, 2005 8:32 AM
To: nmap-dev () insecure org
Subject: Termination problem?

Hi,

I am having a problem with nmap, and maybe someone knows a solution.

I am calling nmap with these parameters:

nmap -P0 -sT -p0-65535 -oN somefile someaddress




This seems to work in a LAN, where the scanned host sends RESET to ports
that are not open, but it seems to go into an endless loop when scanning
machines behind a firewall, which drops most of the packets.


With nmap 3.93 I see plenty of traffic, but after some time nmap does not
sent anything out anymore. strace shows that nmap went into an endless loop:

nanosleep({0, 0}, NULL)                 = 0
gettimeofday({1134995123, 217005}, NULL) = 0 gettimeofday({1134995123,
217968}, NULL) = 0 gettimeofday({1134995123, 218920}, NULL) = 0
gettimeofday({1134995123, 271543}, NULL) = 0 gettimeofday({1134995123,
272512}, NULL) = 0 gettimeofday({1134995123, 273433}, NULL) = 0
gettimeofday({1134995123, 274253}, NULL) = 0 gettimeofday({1134995123,
275048}, NULL) = 0
nanosleep({0, 0}, NULL)                 = 0
gettimeofday({1134995123, 277046}, NULL) = 0 gettimeofday({1134995123,
277864}, NULL) = 0 gettimeofday({1134995123, 278676}, NULL) = 0
gettimeofday({1134995123, 331318}, NULL) = 0 gettimeofday({1134995123,
332359}, NULL) = 0 gettimeofday({1134995123, 333163}, NULL) = 0
gettimeofday({1134995123, 333985}, NULL) = 0 gettimeofday({1134995123,
334799}, NULL) = 0
nanosleep({0, 0}, NULL)                 = 0
gettimeofday({1134995123, 337009}, NULL) = 0 gettimeofday({1134995123,
337955}, NULL) = 0 gettimeofday({1134995123, 338892}, NULL) = 0



I am now trying nmap 3.95, and it currently looks as if it would not stop
sending packets.


Is there any problem with program termination?


regards
Hadmut



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