With IPHost Network Monitor you can run simple snmp requests against a F5 Network device in your network.
natOutsideNetmask
nat Outside Netmask
1.3.6.1.4.1.3375.1.1.102.2.1.13
The outside netmask for this NAT.
Back to LOAD-BAL-SYSTEM-MIB MIB page.
IPHost Network monitor allows you to monitor natOutsideNetmask on F5 Network device via the SNMP protocol. Download IPHost Network Monitor (500 monitors for 30 days, 50 monitors free forever) to start monitoring F5 Network ADC chassis right now.