# How to alert the administrator of a telnet to router or a switch?

Alerting the administrator of a telnet to router or a switch is possible with Syslog monitoring

## Syslog Monitoring in OpManager

Syslog monitoring in OpManager provides a rule-based method of reading syslogs and associating alerts to these syslogs to notify admins or perform other [network management](https://www.manageengine.com/network-monitoring/network-management.html) tasks. OpManager’s Syslog daemon supports a wide number of devices across multiple platforms. It supports any syslog exporting device or applications viz. Servers (Linux, UNIX, AIX and Solaris), routers, switches & etc.

Follow the steps given below to Add Syslog Rules:

## Adding Syslog Rules

Syslog is a client/server protocol that sends event notification messages to the syslog receiver. These event notification messages (usually called as syslog messages) help in identifying the authorized and unauthorized activities like installing software, accessing files, illegal logins etc. that take place in the network. In OpManager Syslog rules help in notifying you if some particular syslog messages such as kernel messages, system daemons, user level messages etc. are sent by the devices.

Apart from the pre-defined syslog rules you can also add any number of syslog rules. Here are the steps to add a syslog rule:

1. Go to **Admin-> Syslog Rules.**
2. Click on the Actions drop down menu and select **Add New Rule.** Add Syslog Rules window opens.
3. Enter a unique **Rule Name.**
4. Enter a brief **Description** about the rule.
5. Select a **Facility**. Facility refers to the application or the OS that generates the syslog message. By default "Any" is selected.
6. Select the required **Severity**.
7. Enter the text that needs to be verified for matching. Note: Regex is supported for this field.
8. Select the **Alarm Severity**.
9. Enter the **Alarm Message**.
10. Click the **Advanced** button to configure advanced (threshold) rules. This is optional.
    - **Number of Occurrences:** Enter the count of the number of consecutive times OpManager can receive syslog message from a device before raising an alert.
    - **Time Interval (seconds):** Enter the time interval that should be considered for calculating the number of occurrences.

    **To clear or rearm the event:**

    - Select the **Facility Name.**
    - Select the **Severity**.
    - Enter the **Matching Text.**
    - Click **Save**.
11. Click **Save**.