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services: openssh: Add forwarding options.

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* gnu/services/ssh.scm (<openssh-configuration>)[allow-agent-forwarding?]
[allow-tcp-forwarding?, gateway-ports?]: New fields.
(openssh-config-file): Handle them.
* doc/guix.texi (Networking Services): Adjust accordingly.

Signed-off-by: Ludovic Courtès <ludo@gnu.org>
This commit is contained in:
Eric Brown 2018-07-24 16:19:40 -05:00 committed by Ludovic Courtès
parent b90d97ec2e
commit 5b68239072
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9
doc/guix.texi
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@ -11650,6 +11650,15 @@ When true, forwarding of X11 graphical client connections is
enabled---in other words, @command{ssh} options @option{-X} and
@option{-Y} will work.
@item @code{allow-agent-forwarding?} (default: @code{#t})
Whether to allow agent forwarding.
@item @code{allow-tcp-forwarding?} (default: @code{#t})
Whether to allow TCP forwarding.
@item @code{gateway-ports?} (default: @code{#f})
Whether to allow gateway ports.
@item @code{challenge-response-authentication?} (default: @code{#f})
Specifies whether challenge response authentication is allowed (e.g. via
PAM).

22
gnu/services/ssh.scm
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@ -289,6 +289,19 @@ (define-record-type* <openssh-configuration>
;; Boolean
(x11-forwarding? openssh-configuration-x11-forwarding?
(default #f))
;; Boolean
(allow-agent-forwarding? openssh-configuration-allow-agent-forwarding?
(default #t))
;; Boolean
(allow-tcp-forwarding? openssh-configuration-allow-tcp-forwarding?
(default #t))
;; Boolean
(gateway-ports? openssh-configuration-gateway-ports?
(default #f))
;; Boolean
(challenge-response-authentication? openssh-challenge-response-authentication?
(default #f))
@ -418,6 +431,15 @@ (define (openssh-config-file config)
(format port "X11Forwarding ~a\n"
#$(if (openssh-configuration-x11-forwarding? config)
"yes" "no"))
(format port "AllowAgentForwarding ~a\n"
#$(if (openssh-configuration-allow-agent-forwarding? config)
"yes" "no"))
(format port "AllowTcpForwarding ~a\n"
#$(if (openssh-configuration-allow-tcp-forwarding? config)
"yes" "no"))
(format port "GatewayPorts ~a\n"
#$(if (openssh-configuration-gateway-ports? config)
"yes" "no"))
(format port "PidFile ~a\n"
#$(openssh-configuration-pid-file config))
(format port "ChallengeResponseAuthentication ~a\n"