[satlab]: Enable TCP port forwarding on satlab remote access

This will allow users to access DUTs via SSH tunnel

Change-Id: Ide5dd3f9ca9707b47dc1c013cd45fe77bd2d264e

Bug:b:211693983
Test: Manually tested
Change-Id: Ic73a67ae50204e91c2d3ff834ee0832016fff868
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/satlab/+/3358684
Reviewed-by: Anh Le <anhdle@chromium.org>
Commit-Queue: Prasad Vuppalapu <prasadv@chromium.org>
Tested-by: Prasad Vuppalapu <prasadv@chromium.org>
diff --git a/src/dockerfiles/satlab_remote_access/Dockerfile b/src/dockerfiles/satlab_remote_access/Dockerfile
index 72aba98..7152c69 100644
--- a/src/dockerfiles/satlab_remote_access/Dockerfile
+++ b/src/dockerfiles/satlab_remote_access/Dockerfile
@@ -50,4 +50,7 @@
 # Make everything in /usr/local/bin executable for good measure.
 RUN /bin/chmod ugo+rx /usr/local/bin/*
 
-WORKDIR /var/log
\ No newline at end of file
+WORKDIR /var/log
+
+# Enable TCP port forwarding required for SSH tunneling.
+RUN  sed -i s/AllowTcpForwarding\ no/AllowTcpForwarding\ yes/ /etc/ssh/sshd_config
\ No newline at end of file