Hi,

Many thanks for your explanations!

> nmap -sU -p U:$yourportlist $targetip
I first did a scan with nmap -sU -p U:140-180 $targetip and nmap
reported that all scanned ports are open|filtered. So I did a new scan
with additional -sV and nmap found the SNMP service running on port
161.
Back in OpenVAS, I created a new Port List with exactly the same UDP
port range and no tcp ports. However, OpenVAS did not report the SNMP
service.

> this gives you already a pointer. In general it is recommended to
> whitelist the scanning machine to avoid such issues while port scanning.
I created a new rule in the Windows Firewall allowing all incoming
traffic from the scanning machine. But the results remain the same! To
crosscheck, I disabled the firewall and did the same scan again - and
OpenVAS found the SNMP service.

> It won't solve your issue but you should note that these are quite
> outdated components of OpenVAS. Please update to the current components:
> Libraries 8.0.8
> Scanner 5.0.7
> Manager 6.0.9
I will do this any time soon!

> Both lists contain port 161?
Yes, all the lists used contain port 161.

Regards
Daniel
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