I can confirm I got very similar results

- Sergio 

-----Mensaje original-----
De: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]
En nombre de Roman Medina-Heigl Hernandez
Enviado el: Miércoles, 25 de Junio de 2008 03:21 p.m.
Para: [email protected]
Asunto: Re: Remote host dead?

Hello,

I can confirm 3.2.1 for Windows is buggy.

What I did (using my laptop with 3.2.1 version):
- scan a host (my website) -> Failed (Remote host dead)
- reinstall Nessus 3.2.1 and repeat the test -> Failed again
- uninstall 3.2.1 and install 3.2.0. Repeat the scan -> Succeded!
- upgraded plug-ins (keeping 3.2.0) and repeat the scan -> Succeded!

So it seems not a problem in plug-ins but in Nessus 3.2.1 (Windows). At the
moment, my advice for windows users would be downgrading to 3.2.0.

During the tests, I monitorized traffic with Wireshark:
- remote host dead -> Nessus sent two SNMP probes ; and received two icmp
responses, because snmp target port is closed. Nothing more.
- alive -> Like the former one but then Nessus continued sending tcp
packets! :-)

Since Sergio had the same problem, I'm wondering if the problem is known and
whether it is being reviewed.

Regards,
-Roman

Roman Medina-Heigl Hernandez escribió:
> Sergio, which Nessus version are you using?
> 
> I have 3.2.0 (windows) on my desktop and in my case could solve the 
> problem by activating "icmp ping" (as sugested by George). This was 
> possible because the scanned host is responding to icmp echo (although 
> it's got closed all the ports used by "tcp ping").
> 
> I've got 3.2.1 (windows) on my laptop and it's not working at all 
> against the very same host. I thought it's a problem in my laptop, not 
> Nessus'. But if you confirm 3.2.0 worked for you but not 3.2.1... 
> Please, could you elaborate on that? Anyway, don't panic, I still 
> think it could be some kind of problem in my laptop (perhaps some 
> antivirus module, etc.... although I disabled Windows firewall and 
> some antivirus services, and the problem remains...).
> 
> Cheers,
> -Roman
> 
> Sergio Castro escribió:
>> I reported this exact same problem a few weeks ago.
>> I was running the previous version of Nessus with no problems whatsoever.
>> Then I updated to the latest version for Windows, and had this 
>> "remote host is dead" problem too. Nothing changed in my system, and 
>> I tried to scan the exact same hosts I was sucessfully scanning with 
>> the older version of Nessus.
>>
>> With the help of Ron Gula, I went through the same troubleshooting 
>> you are going through, with no results. I still can't scan hosts on 
>> the Internet, only LAN.
>>
>> Regards,
>>
>> Sergio
>>
>> -----Mensaje original-----
>> De: [EMAIL PROTECTED] 
>> [mailto:[EMAIL PROTECTED]
>> En nombre de Roman Medina-Heigl Hernandez Enviado el: Lunes, 23 de 
>> Junio de 2008 02:21 p.m.
>> Para: [email protected]
>> Asunto: Remote host dead?
>>
>> Hello,
>>
>> I'm trying to scan a host with the default policy. The host is alive 
>> and responding to pings. I got no results when scanning with Nessus 
>> 3.2.0 (Windows). Looking at scan.log (in he "logs" dir), I can see a 
>> "remote host is dead". But my question is why? If I run nmap against 
>> the host, I can see unprivileged ports open (>1024) and of course 
>> it's responding to ping. I also entered 1-65535 in "port scanner 
>> range". No luck at all. Am I missing something? Perhaps a bug in Nessus?
>>
>> Another question, how could I debug this? If I enable the option to 
>> "save a packet capture of the scan", I couldn't find any new log on 
>> logs dir (where should it be placed?)
>>
>> Log attached (IP stripped; I could provide it in private for 
>> testing/debugging purposes):
>> [Mon Jun 23 20:56:43 2008][540] Use default port range [Mon Jun 23 
>> 20:56:48 2008][540] user localuser : testing X.X.X.X (X.X.X.X) [540] 
>> [Mon Jun 23
>> 20:56:48 2008][540] Scan X.X.X.X using 21942 plugins [Mon Jun 23 
>> 20:56:48 2008][540] user localuser : launching 
>> clrtxt_proto_settings.nasl against X.X.X.X [1] [Mon Jun 23 20:56:48 
>> 2008][540] user localuser : launching dont_scan_settings.nasl against 
>> X.X.X.X [2] [Mon Jun 23 20:56:48 2008][540] user localuser : 
>> launching ssh_settings.nasl against X.X.X.X [3] [Mon Jun 23
>> 20:56:48 2008][540] clrtxt_proto_settings.nasl (process 1) finished 
>> its job against X.X.X.X in 0.000 seconds [Mon Jun 23 20:56:48 
>> 2008][540] dont_scan_settings.nasl (process 2) finished its job 
>> against X.X.X.X in 0.000 seconds [Mon Jun 23 20:56:48 2008][540] 
>> ssh_settings.nasl (process 3) finished its job against X.X.X.X in 
>> 0.000 seconds [Mon Jun 23 20:56:48 2008][540] user localuser : 
>> launching snmp_settings.nasl against X.X.X.X [4] [Mon Jun 23 20:56:52 
>> 2008][540] snmp_settings.nasl (process 4) finished its job against 
>> X.X.X.X in 3.578 seconds [Mon Jun 23 20:56:52 2008][540] user 
>> localuser : launching ping_host.nasl against X.X.X.X [5] [Mon Jun 23
>> 20:56:54 2008][540] ping_host.nasl (process 5) finished its job 
>> against W.W.W.W in 2.921 seconds [Mon Jun 23 20:56:54 2008][540] user
localuser :
>> launching dont_scan_printers.nasl against X.X.X.X [6] [Mon Jun 23 
>> 20:56:54 2008][540] The remote host (X.X.X.X) is dead [Mon Jun 23 
>> 20:56:54 2008][540] Finished testing X.X.X.X. Time : 6.718 secs, 6 
>> plugins launched [Mon Jun 23
>> 20:56:54 2008][540] 1 hosts scanned
>>
> 

-- 

Saludos,
-Roman

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