SFTP Proxy Questions

[robertgates55]

I have an upstream service running an SFTP server, which I can authenticate to using my private key (ie it has been provided the public key)

I'd like to be able to put sshpiper between me and this service; and have my private_key authenticate with the upstream SFTP server - but I'm getting upstream sftp authentication errors when going via sshpiper.

My yaml config is:

version: 1
pipes:
- username: robertgates
  username_regex_match: false
  upstream_host: sftp:8022
  ignore_hostkey: true

Is this expected?

Is this (passthrough) possible:

client | sshpiper | upstream
 PK_1  >   ...    >   PK_1

Or do I have to map the auth to a second keypair?:

client |   sshpiper  | upstream
 PK_1  > PK_1 | PK_2 >   PK_2

[tg123]

passthrough is not possible
piper must have the private key to upstream in order to get auth

the key map is required for key based auth to upstream