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October 7, 2023 14:48
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MikroTik backup link over LTE
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| /ip firewall filter | |
| add action=drop chain=output comment="drop pings to 8.8.8.8 if they go through LTE" \ | |
| dst-address=8.8.8.8 out-interface=lte1 protocol=icmp | |
| /ip firewall nat | |
| add action=masquerade chain=srcnat src-address=192.168.1.0/24 comment=ISP1 | |
| add action=masquerade chain=srcnat src-address=192.168.1.0/24 out-interface=lte1 disabled=yes comment=LTE | |
| /system script | |
| add name=ISP1up owner=admin policy=ftp,reboot,read,write,policy,test,password,sniff,sensitive,romon source=\ | |
| "/ip firewall nat set [find comment=\ISP1\"] disabled=no\r\ | |
| \n/ip firewall nat set [find comment=\"LTE\"] disabled=yes\r\ | |
| \n/log error \"ISP1 is up\"" | |
| add name=ISP1down owner=admin policy=ftp,reboot,read,write,policy,test,password,sniff,sensitive,romon source=\ | |
| "/ip firewall nat set [find comment=\"ISP1\"] disabled=yes\r\ | |
| \n/ip firewall nat set [find comment=\"LTE\"] disabled=no\r\ | |
| \n/log error \"ISP1 is down\"" | |
| /tool netwatch | |
| add down-script=ISP1down host=8.8.8.8 interval=5s timeout=2s up-script=ISP1up |
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