easyfind. public IP vs NAT

Submitted by vchakravarthy on #1

Hi,

we are using easyfind with virtualhere package installed on synology. our remote clients with public IP are connecting with easyfind without any issues. but remote clients behind a nat gateway are unable to connect. is there any specific port we have to open for this to work?

Submitted by Michael on Thu, 2021/10/14 - 06:07

#2

Easyfind works through NAT's but won't work through good firewalls, so it might be a firewall issue. UDP 443 is used for easyfind

Submitted by vchakravarthy on Thu, 2021/10/14 - 11:00

#3

Thank you Michael,
if I have to whitelist the easyfind server along with UDP 443, which IPs should I use?

Submitted by vchakravarthy on Thu, 2021/10/14 - 11:08

#4

quick update.
opened UDP/443 bi-directional for 0.0.0.0/0. Still cannot see USB Hub

Submitted by Michael on Thu, 2021/10/14 - 13:10

#5

OK something is blocking it e.g mutliple levels of NATs some of them symmetric (e.g https://dh2i.com/kbs/kbs-2961448-understanding-different-nat-types-and-…) , so it looks like you will have to use a relay.

VirtualHere easyfind wont support relays (they are too slow) but try something like zerotier instead of easyfind. (That will use a relay if it cannot connect direct). It will be slow so it depends on what you want to pass through .If its just e.g a licensing dongle it should be ok. If its something else e.g like a disk or serial device you will need to just directly open tcp 7575 to allow direct communications

Submitted by Michael on Thu, 2021/10/14 - 15:14

#7

It will work, but it will use a relay. I havent bothered adding relays to easyfind because its just too slow. There is an extra hop and data copy for every single data packet.