SNMP Manager cannot get data from NetScaler

SNMP Manager cannot get data from NetScaler

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Article ID: CTX572740

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Description

SNMP manager cannot get data from NetScaler, getting error "No Response from <NetScaler NSIP>" when doing snmpwalk in SNMP manager. 

[root@Zabbix ~]# snmpwalk -v 2c -c <community name> <NetScaler NSIP>
Timeout: No Response from <NetScaler NSIP>
Note: The SNMP manager is Zabbix in this case.

Resolution

Please open the following ports in firewall:
  • SNMP queries are sent to UDP port 161 from the SNMP manager to the NetScaler.
  • SNMP traps from NetScaler NSIP are sent to SNMP manager UDP port 162.

Problem Cause

There is an intermediate firewall blocking UDP port 161 from the SNMP manager to the NetScaler NSIP, therefore,  SNMP manager unable to get data when querying NetScaler.

Issue/Introduction

SNMP manager cannot get data from NetScaler because firewall blocking UDP port 161.

Additional Information

https://docs.citrix.com/en-us/tech-zone/build/tech-papers/citrix-communication-ports.html
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