[44net] Tunnel setup help: Debian 11

I have been trying to configure the AMPRtunnel for a while without success. Could someone please point me to the right direction. I am running Debian 11 with public IP. I have configured the public IP in the AMPR portal as gateway. I am trying to follow this document https://wiki.ampr.org/wiki/Ubuntu_Linux_Gateway_Example When I try to run find_password.sh in ampr-ripd-2.4, I am stopped at Waiting for RIPv2 broadcasts...  and never retrieve a password. Here is what I have done so far. in /etc/network/interfaces, I added auto ens3:1 iface ens3:1 inet static address 44.26.0.168 netmask 255.255.255.248 Then I created ipip tunnel using following commands  ip tunnel add ampr0 mode ipip local 209.141.42.9 ttl 255  ip link set dev ampr0 up  ifconfig ampr0 multicast  ip rule add to 44.0.0.0/8 table 44 priority 44  ip rule add from 44.26.0.168/29 table 44 priority 45  ip route add default dev ampr0 via 169.228.34.84 onlink table 44  ip route add 44.26.0.168/29 dev ens3 table 44 Then, I run ampr-ripd -d -v -i ens3  to get the password  in order to plug into lat command ampr-ripd -s -i ampr0 -a 209.141.42.9-t 44 -p <SecretPassword> However, the find_password.sh stopped at waiting for ripv2 broadcast.  Here is the logs for command Using metric 0 for routes. Using TCP window 840 for routes. Using gateway 209.141.42.1 for direct 44net endpoints via interface ens3. Waiting for RIPv2 broadcasts... Any idea on what am I doing wrong? Thanks Kun