No SSH public key authentication using smartcard

[Stephan Verbücheln]

To my knowledge, no (explicit) agent forwarding is required for
ProxyJump configurations.

I am using the following configuration to access a LAN machine over the
Internet. Both machines use the GnuPG key for authentication.

Host rdeep
    HostName 192.168.1.151
    ProxyJump verbuecheln.ch
    IdentityAgent ${XDG_RUNTIME_DIR}/gnupg/S.gpg-agent.ssh

This also works when the Internet connection is using IPv6 and the LAN
connection is using IPv4. SSH takes care of these things transparently.

Regards
Stephan

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