Install SNMP and Configure Community String in Ubuntu

We have to regularly monitor server resources e.g. CPU, RAM, Storage, Network Bandwidth Utilization as a day-to-day activity. By monitoring the resources, we may find out the exact cause of any incident that might occur due to full resource utilization. It can guide us to increase the resources as well if require.

We are currently using Observium and Cacti to monitor resource utilization. In order to connect the servers with the observium/Cacti, we have to configure SNMPD in the server.

You may follow below guideline to install it in Ubuntu servers.

Test Environment: Ubuntu 16.04 LTS and Ubuntu 18.04 LTS

 

Step 1: Install SNMPD.

root@mail:~# apt-get install snmpd

 

Step 2: Rename the existing snmpd.conf file and create a new one.

root@mail:~#mv /etc/snmp/snmpd.conf  /etc/snmp/snmpd.conf.ori

root@mail:~# touch /etc/snmp/snmpd.conf

 

Step 3: Configure the SNMP community string.

root@mail:~# vim /etc/snmp/snmpd.conf

rocommunity mystring@322

syslocation "Observium Server"

syscontact afsher@xyz.com

 

Step 4: Comment the existing line start with SNMPDOPTS and add the below line in the default file of snmpd.

root@mail:~#  vim /etc/default/snmpd

#SNMPDOPTS='-Lsd -Lf /dev/null -u snmp -g snmp -I -smux,mteTrigger,mteTriggerConf -p /run/snmpd.pid'

SNMPDOPTS='-Lsd -Lf /dev/null -u snmp -I -smux -p /var/run/snmpd.pid -c /etc/snmp/snmpd.conf'

 

Step 5: Restart snmpd service.

root@mail:~# /etc/init.d/snmpd restart

Comments

Post a Comment

Popular posts from this blog

Install a Comodo/Sectigo Domain Validation SSL certificate in Zimbra

Objective:  Install a Comodo/Sectigo Domain Validation (DV) SSL certificate in Zimbra. We usually get the below four files from Sectigo in the certificate bundle. The file name may vary depending on the certificate type 1.     yourdomain.com.crt - main certificate 2.     AAACertificateServices.crt – Root Certificate 3.     USERTrustRSAAAACA.crt – Intermediate Certificate - 1 4.     SectigoRSADomainValidationSecureServerCA.crt - Intermediate Certificate - 2 Step 1:  We shall create two files as below. commercial_ca.crt (includes root certificate and two intermediate certificates) commercial.crt (includes main certificate, root certificate and two intermediate certificates) Step 2:  Login to Zimbra server, move to directory /opt/zimbra/ssl/zimbra/commercial and create two files as below. root@mail:~# cd /opt/zimbra/ssl/zimbra/commercial/ root@mail:/opt/zimbra/ssl/zimbra/comme...
Read more

Adding DKIM record (1024 bit) in Zimbra

Image
Email security is very important now a days. We always look for inbound email security. However, it is very much important to enhance security for outbound emails too for successful email delivery to the recipient inbox. DomainKeys Identified Mail (DKIM) provides an organization to take responsibility for a message that is in transit. The sending server reputation is responsible for successful email delivery. DKIM provides the message is not being altered in the transmission of message till delivery of it. Technically DKIM provides a method for validating a domain name identity that is associated with a message through cryptographic authentication. In some cases, we have generate 1024 bit DKIM key due to old Zimbra version or lack of support 2048 bit key in DNS servers. The below steps should be performed to achieve the goal of publishing 1024 bit DKIM key. Generate DKIM Key: DKIM signing is done at the domain level, including alias domains. Setting up signing consists of two p...
Read more

Recipient Limit of a Message in Zimbra

Image
We received some complaints from one of our customers regarding problem of sending email, especially rate limit, to Gmail. After some diagnosis, we found that the users keep 70-80 email addresses in TO/CC/BCC. In order to restrict users to send emails on such accounts at a time, we implemented a policy. After executing this policy, users shall not be able to add more than 10 email addresses in a message. root@mail:~# su – zimbra Check the current limit: zimbra@mail:~$ postconf | grep smtpd_recipient_limit  smtpd_recipient_limit = 1000     ##This is the default recipient limit zimbra@mail:~$ postconf -e 'smtpd_recipient_limit = 10'   It will restrict the recipient limit to 10. You may adjust the number based on your scenario. To apply settings. zimbra@mail:~$ postfix reload After applying this settings, you will get an error while sending a message greater than the threshold value (in this case: 10). It is also t...
Read more