Installation guide

74
Table 33 – SNMP Settings
Option
Description
UDP port
Direct Nessus to scan a different port in the event that SNMP is running on a port other
than 161.
SNMPv3 user name
The username for a SNMPv3 based account.
SNMPv3 authentication
password
The password for the username specified.
SNMPv3 authentication
algorithm
Select MD5 or SHA1 based on which algorithm the remote service supports.
SNMPv3 privacy password
A password used to protect encrypted SNMP communication.
SNMPv3 privacy algorithm
The encryption algorithm to use for SNMP traffic.
SSH settings (plugin 14273) – Users can select “SSH settings” from the drop-down menu and enter a “known_hosts”
file for scanning Unix systems. There is also a field for entering the “Preferred SSH Port”. By default Nessus will use the
standard TCP port 22 for credentialed Unix scans; however, this setting enables the user to specify a non-standard port
for SSH login attempts.
Service Detection (plugin 22964) controls how Nessus will test SSL based services: known SSL ports (e.g., 443), all
ports, or none. Testing for SSL capability on all ports may be disruptive for the tested host.
VMware SOAP API Settings (plugin 57395) provides Nessus with the credentials required to authenticate to VMware
ESX, ESXi, and vSphere Hypervisor management systems via their own SOAP API, as SSH access has been
deprecated. This API is intended for auditing vSphere 4.x / 5.x, ESXi, and ESX hosts, not the virtual machines running on
the hosts. This authentication method can be used to perform credentialed scans or perform compliance audits.