Recently I was doing some work for a hotel that supplies a ‘Smart TV’ device with Netflix and other functions in every room. These rooms are in turn all connected to a hotspot network and the TV’s all needed to be given internet access.
As this was (as sometimes occurs) an unexpected addition to the known requirements of the installation, it fell to me to come up with a way to add these – preferably without having to have someone walk around manually collect details for 300+ TV’s.
The following script can be run in terminal (or via any automation tool that can login to your MikroTik devices via SSH) and checks for any duplicate script ‘jobs’ and kills them.
I wrote this after noticing a few of my scripts that use fetch would hang periodically and leave multiple jobs open.
#kill duplicate script jobs
:global counter
:global counter2
:foreach counter in=[/system script job find] do={
:global job [/system script job get $counter script]
:if ([:len [/system script job find where script=$"job"]] > 0 && [:len $job] > 0) do={
:put "Duplicate script running: $job - terminating all"
:foreach counter2 in=[/system script job find where script=$"job"] do={
/system script job remove $counter2
}
}
}
Continue reading Scriptlet: Halt MikroTik scheduled scripts if multiple instances are detected.
Today I’m giving you the task of reviewing and improving a small script I’ve written, and one of you will win a free Level 4 RouterOS licence.
Background: I had need of a script to find the interfaces associated with any default routes in order to create matching firewall entries, and it had to work with RouterOS v6.
This script searches through any default route (dst-address=0.0.0.0/0) and adds it to an array so long as the interface can’t already be found in the array. I don’t often use arrays in MikroTik so the first version has a search function that doesn’t loop through the array, but instead just converts it to a string again to run the find command (Line 8)
Continue reading Scriptlet: Find Default Route Interface Names (and a free licence!)
Hi guys,
This is my second article and I wanted to raise the difficulty level of my tutorials!
We work a lot with Asterisk PBX and MikroTik and we’ve encountered a problem when we have 2 internet connection with a MikroTik using WAN failover, our Asterisk PBX would stop working when the primary connections fail; we finally figured out why.
In this case, the Asterisk connections would remain appended to the primary gateway, and Asterisk doesn’t understand the change of connection; so we came up with a solution using 2 MikroTik scripts.
First, the “Check Script” checks if the primary internet connection is working or not. If fails, use the secondary internet link and reboot the router. You are probably asking why we would do this…I know!
Because after the reboot I can run a “Restart Script” to check if primary connection is still out, or came back.
In this way, by rebooting the router, the asterisk pbx client loose for a moment the registration and reconnect with the new gateway so everything works.
Actually we’re testing other solutions to avoid the router reboot…when I’ve found that I’ll update this post and let you know!
Editors note: This could be achieved in a few ways, I’ll leave it as a test for our readers to see what improvements you can come up with!
Here are the scripts:
Check Script
:global strDate [/system clock get date]
:global strTime [/system clock get time]
:global strSystemName [/system identity get name]
:if ([/ping 10.104.7.187 interface=pppoe-out1 count=5] = 0 && [/ping 8.8.4.4 interface=pppoe-out1 count=5] = 0 && [/ip route get [find comment="Primary"] disabled]=false) do={
:log info "Disabling Primary";
/ip route set [find comment="Primary"] disabled=yes
/tool e-mail send from="[email protected]" to="[email protected]" subject="Route Failover - $strDate $strTime - $strSystemName" body="Failover to Telecom occurred at $strDate $strTime on $strSystemName"
:delay 3
/system reboot
} else= {
:log info "No Failover Necessary";
}
Restart Script
:delay 10;
:if ([/ip route get [find comment="Primary"] disabled]=true) do={
/interface ethernet set numbers=4 disabled=no
/ip route set [find comment="Primary"] disabled=no
/ip route set [find comment="Primary"] distance=3
:delay 10
:if ([/ping 10.104.7.187 routing-table=Primary count=5] > 0 && [/ping 8.8.4.4 routing-table=Primary count=5] > 0) do={
/ip route set [find comment="Primary"] distance=1
/system reboot
}
else= {
/ip route set [find comment="Primary"] distance=3
}
} else= {
:log info "No Failover Necessary";
}
Written by Razorblade, edited by Omega-00
Just a quick post to show an example of day to day usage of RouterOS scripting.
Goal: We had to change the src-address for a bunch of radius-server listings across 40 MikroTik devices, to match a new pptp-tunnel address. What would’ve been a pain was that the address is different on each device.
Solution: Create a scriptlet to pull the IP into the update (set) routine, ensuring it is formatted correctly for use.
Continue reading Script Fu – Changing RADIUS server source address