BIG-IP can't send emails Alert when match SNMP trap condition defined in user_alert.conf file

[Phu]

My BigIP device is running on version v16.0.1.

I setup /etc/ssmtp/ssmtp.conf file with below option:

• TLS_CA_FILE=/etc/pki/tls/certs/ca-bundle.crt
• root=XXXX@gmail.com
• mailhub=smtp.gmail.com:587
• AuthUser=XXXX
• AuthPass=XYXYX
• UseSTARTTLS=Yes
• UseTLS=Yes
• hostname=bigipA.gmail.com

Testing ssmtp running well: printf "Subject: Test email for K13180\n\nssmtp test mail" | ssmtp -v YYYYYY@gmail.com

I defined user_alert.conf as below - https://support.f5.com/csp/article/K15288

• alert CERTIFICATE_EXPIRED "Certificate (.*) expired" {
• snmptrap OID=".1.3.6.1.4.1.3375.2.4.0.300";
• email toaddress="user@mydomain.com"
• body="Certificate Expired on <BIG-IP>"
• }
•  
• alert CERTIFICATE_WILL_EXPIRE "Certificate (.*) will expire" {
• snmptrap OID=".1.3.6.1.4.1.3375.2.4.0.301";
• email toaddress="user@mydomain.com"
• body="Certificate will Expire on <BIG-IP>"
• }

Testing the email notification:

#tmsh create sys crypto key SOL15288testcert gen-certificate lifetime 10 common-name SOL15288testcert.com

#tmsh run sys crypto check-cert

I don't receive any email for this testing. I don't know why it's not run.

Can anyone help me?!!!

Thanks so much.

[crodriguez]

In reading K15288, the steps for configuring the BIG-IP system to use an SMTP server when using BIG-IP v11.5.0 or later (which v16 is) do not call for modifying /etc/ssmtp/ssmtp.conf but rather ask you to use TMSH command instead, specifically:

(tmos)# modify /sys outbound-smtp mailhub <mail_server>:<port>

For example, to configure the system to send email messages to host mail.mydomain.com using port 587, you would type the following command:

(tmos)# modify sys outbound-smtp mailhub mail.mydomain.com:587

The instructions for modifying the /etc/ssmtp/ssmtp.conf file apply only to BIG-IP versions 11.0.0 through 11.4.1.

Can you try the TMSH solution and see if that works, please?

[Phu]

Hi Crodriguez,

I try to setup both ssmtp.config and TMSH modify sys outbound-smtp mailhub methods.

sys outbound-smtp {

  from-line-override enabled

  mailhub smtp.mydomain.com:587

  rewrite-domain bigipA.mydomain.com

}

The testing also failure.

But I realize that when I modify mailhub by TMSH, the mailhub option in ssmtp.config also change accordingly.