Meshed VPN

https://2kswiki.wordpress.com/2016/02/05/simple-vpn-network-mesh-with-tinc/ — centos

How to setup a site-to-site VPN using tinc in pfSense ?

https://forum.pfsense.org/index.php?topic=90536.0

https://www.tinc-vpn.org/

https://groverchou.com/blog/2017/07/23/使用-Tinc-建立-VPN-连接并配置-NAT-网关/

yum install stun

stun -v stun.sipgate.net 0

偵測後的結果,可根據 Primary log 解讀,方式如下:
“Open” = Open Internet
“Independent Mapping, Independent Filter” = Full Cone NAT
“Independedt Mapping, Address Dependendent Filter” = Restricted Core NAT
“Indepndent Mapping, Port Dependent Filter” = Port Restricted Core NAT
“Dependent Mapping” = Symmetric NAT
“Firewall” = Symmetric Firewall
“Blocked or could not reach STUN server” = UDP Blocked

http://blog.adityapatawari.com/2014/09/types-of-nat-and-how-to-determine-nat.html

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