Hi,
Please, I'm new with core tunnel, I'm a little confused, how I can use it?, I want to use local port 8080, and the remote server want to use 161, how can use in app?
local IP :192.168.1.1 port 8080
remote server 10.104.20.123 port 161
I want to redirect the SNMP query from my remote to my local pc.
Do you have any manual to understand better?
Thanks
SSH port forwarding is a general proxying mechanism for TCP only, while SNMP is an UDP connection.
So you can't redirect SNMP queries over Core Tunnel directly, you need a bridge to transform UDP diagram into TCP diagram.
I found a guide that may help:
Let me know if you need assistance.
Yang
Hi,
I have new version of core tunnel, suddenly stop working and won't open. how can solve this ?
Thanks
Any crash log displayed? If not, what's the version of macOS? Are you using a M1 Mac? Is there any suspicious log item in Console.app ?
Yang
no open, no appear nothin, im using M1, where can get log?
I try to forward remote port 443 to local port 8080, I apply this rule
ssh -L localhost:8080:18.206.148.190:443 -o ServerAliveInterval=15 -o ServerAliveCountMax=3 -o ExitOnForwardFailure=yes administrator@18.206.148.190
when try to open webpage in localhost didn't work
something is wrong?
The correct command should be:
ssh -L localhost:8080:localhost:443 -o ServerAliveInterval=15 -o ServerAliveCountMax=3 -o ExitOnForwardFailure=yes administrator@18.206.148.190
The second "localhost" means the local host name on remote 18.206.148.190.
Yang
Did you enabled Menu bar icon mode in Preferences? Please check if this icon in your Menu bar:
I can't open windows, no load nothing, I restart my Mac but still happen the same.
Could you please run this command:
mv ~/Library/Containers/io.coressh.tunnel ~/Library/Containers/io.coressh.tunnel.bak
Then restart your Mac and relaunch Core Tunnel?
Yang
(base) ja@MBP-M1skyonesco ~ % mv ~/Library/Containers/io.coressh.tunnel ~/Library/Containers/io.coressh.tunnel.bak
mv: rename /Users/ja/Library/Containers/io.coressh.tunnel to /Users/ja/Library/Containers/io.coressh.tunnel.bak: No such file or directory
restart and same behavior 
Well, I think I've found the cause.
~/Library/Containers/io.coressh.tunnel should be created by system for Core Tunnel automatically, but for unknown reason, it didn't created as expected.
So when you try to rename the directory, it warns you it does not exists.
It should be a macOS fault. Do other newly installed apps work? Do you have installed third-party software like CleanMyMac or other protection/ cleaner tool?
Yang
Only use antivirus.
But no appear any events in my antivirus with core tunnel, this behavior happen in new version. old version works as normal
The container directory ~/Library/Containers/io.coressh.tunnel is managed by macOS, and the app (aka. Core Tunnel) has no privilege to rename or delete this folder.
Could you please give 3.0.1 beta a try? It has a different container folder named io.coressh.tunnel-beta.
Yang
Work ok this version beta, but what happen with official version ?
Have no idea about this glitch at this moment, but obviously it should be a macOS or third-party fault. The beta and official release have same codebase.
Please Quit Core Tunnel (Beta), and try again with this command:
cp -R ~/Library/Containers/io.coressh.tunnel-beta ~/Library/Containers/io.coressh.tunnel
Then restart your Mac again and relaunch Core Tunnel public release afterwards, it may be functional again.
Yang
The issue is with core tunnel, core shell work perfect!
Though it's highly unlikely an issue of the app, I'll keep an eye on it.
Yang