Monday, March 29, 2021

Restrict SNMP access on Lenovo NE1032 CNOS 10.10.2.0

I have a NE1032 running CNOS 10.10.2.0 and configured for SNMP, the SNMP is Woking fine.

Currently SNMP is available on any vlan interface from any source, I'm trying to restrict SNMP access with a simple IPv4 ACL but haven't managed to get this working.

From the 10.10 application guide I believe the correct configuration would be like below.

https://systemx.lenovofiles.com/help/topic/com.lenovo.thinksystem.ne1032.doc/CNOS_AG_10-10.pdf

Switch(config)# line vty vrf default

Switch(config-vrf-vti)# ip access-class MANAGEMENT in

IP access list  MANAGEMENT
        10 permit ip host 192.168.1.1 any
        20 permit ip 192.168.0.0/16 any

But when I applied this to my switch I didn't get any change in behaviour, I could still SSH and SNMP to the switch.

Even creating a deny statement at the top of the ACL and specifying my server IP I still could access the switch.

I confirmed the particular vlan interface I was testing belongs to the default VRF, 

CP-OP-RSP-SW02(config)#show vrf
Maximum number of vrfs allowed: 65
VRF default, FIB ID 0
Router ID: 192.168.99.2 (automatic)
RD 0:0
Interfaces:
  Vlan1
  Vlan55
  Vlan57
  Vlan58
  Vlan59
  Vlan60
  Vlan62
  Vlan98
Vlan99
  Vlan502
  Vlan506
  loopback0
  po1
  Ethernet1/1
  Ethernet1/2

I assume I have overlocked something but struggling to find it, Can anyone please give me some assistance on this?



No comments:

Post a Comment