ESX blocks requests from Nagios

[tonyA56]

Hello,

I have 2 VMware ESX 5.1 servers and a nagios server at a remote site(with a different subnet).

My snmp requests to my esx worked very well.

But Recently, one of my ESX does not respond to ping or SNMP requests of nagios (timeout)..

If i change the IP address of nagios server (192.168.1.50/24 instead of 192.168.1.49/24), then the ESX responds back to Nagios for a while.. and the still refuse...

I think the ESX blocks requests from Nagios, but I don't know how. Note that only 1 of 2 esx is impacted..  If someone has a track, I'm interested..

Tony

[Borja_Mari]

Hello,

check this vmware'skb about the esxi 5.X firewall:

VMware KB: About the ESXi 5.x firewall

Best regards,

Pablo

[tonyA56]

Helo Pablo,

Thank you for the reply, but I have not found any rule on the esx firewall.

All devices(including esx) correctly ping the Nagios server.

All devices corrctly ping ESX, except Nagios server.

I thought too it came from the firewall, but I have found nothing..

~ # esxcli network firewall ruleset allowedip list

Ruleset             Allowed IP Addresses ------------------  --------------------

sshServer            All

sshClient             All

nfsClient              IP_of_my_NAS

dhcp                    All

dns                      All

snmp                   All

ntpClient             All

CIMHttpServer   All

CIMHttpsServer      All

CIMSLP               All

iSCSI                   All

vpxHeartbeats       All

updateManager     All

faultTolerance        All

webAccess            All

vMotion                  All

vSphereClient       All

activeDirectoryAll  All

NFC                  All

HBR                  All

ftpClient           All

httpClient         All

gdbserver        All

DVFilter           All

DHCPv6          All

DVSSync         All

syslog              All

IKED                All

WOL                 All

vSPC                All

remoteSerialPort    All

vprobeServer          All

dynamicruleset       All

[Borja_Mari]

Hello,

Are there some firewall between the nagios server and the esxi host?

Maybe this firewall is what is blocking nagios.

Best regards,
Pablo