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Ubuntu MikroTik GRE why does the tunnel crash when inactive?
It's written on Ubuntu
auto tun0
iface tun0 inet static
address 10.10.0.1
netmask 255.255.255.0
up ifconfig tun0 multicast
pre-up iptunnel add tun0 mode gre local ХХХ.ХХХ.ХХХ.ХХХ remote YYY.YYY.YYY.YYY ttl 225
pointopoint 10.10.0.2
post-down iptunnel del tun0
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Hm. I encountered such moronic behavior when I worked with racoon. For this, I had to add a “service” in nagios that constantly kicked the nodes, and it was exactly as described - the tunnel rose only when pinged from one side :D
Maybe some timeouts or analogues of IPSec dead peer detection?
Uh-huh, I confirm the words of CityCat4 about the racoon. I then charged cron to do 1 ping every minute
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