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тАО09-18-2003 10:15 AM
тАО09-18-2003 10:15 AM
Nessus client scanning
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тАО09-18-2003 01:25 PM
тАО09-18-2003 01:25 PM
Re: Nessus client scanning
I've used Nessus quite abit. I have experienced some sproblems like this. I have some questions for you - what OS is this loaded on? Are you using DNS? Are you running it via command line or GUI? What other options are you using apart from the port scan? Are you getting any type of report generated from the port scan?
Let me know, I'd like to help.
Jo
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тАО09-19-2003 08:12 AM
тАО09-19-2003 08:12 AM
Re: Nessus client scanning
To troubleshoot the problem on the client system,
1) check where exactly nessus hung. Nessus creates a temporary progress log in /tmp which tracks which portions of the nessus scan have completed.
2) perform a netstat or lsof to check which port it is currently performing a check on
By default, nessus sets the nmap portscan to the port range of 1-15000 in its configuration file. You can finetune it to your requirements. Personally, I prefer the entire port range of 0-65535 to be scanned, in order to detect any trojans or backdoors.
If nessus hangs at the portscan or a plugin execution, you can terminate only the specific portscan or plugin execution to allow remainder of nessus scan to run to completion. First, run lsof to identify the nessusd processes bound to opened ports on the scanned system. Then send a HUP signal (kill -HUP) to these processes. Once the hung nessus child processes are terminated, nessus will run its scan to completion.
Hope this helps. Regards.
Steven Sim Kok Leong
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тАО09-19-2003 08:25 AM
тАО09-19-2003 08:25 AM
Re: Nessus client scanning
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тАО09-19-2003 08:35 AM
тАО09-19-2003 08:35 AM
Re: Nessus client scanning
You will need to check the logs for more details. While the nessus scan is running, you can check the transitional log file in /tmp. For logs of past scans, you can check the nessus log file. By default, your nessus.conf specifies the log file as /usr/local/var/nessus/nessusd.messages. If that doesn't give enough details, check the dump as well. The default dumpfile location is /usr/local/var/nessus/nessusd.dump, also specified in your nessus.conf.
Hope this helps. Regards.
Steven Sim Kok Leong