Hi Andreas,
Thanks for answering!. It was what you commented…
The content of the two OIDS are:
1. .1.3.6.1.2.1.1.1.0
SNMPv2-MIB::sysDescr.0 = STRING: Linux VSX-23900-APP2.redsara.es 2.6.18-92cpx86_64 #1 SMP Thu Jun 20 10:40:25 IDT 2019 x86_64
2. .1.3.6.1.4.1.2620.1.1.21.0
SNMPv2-SMI::enterprises.2620.1.1.21.0 = STRING: “Firewall”