Make transmission turn on the alternate bandwidth limits (turtle mode) when you login over ssh and turn back on when you log out of the last ssh connection.

transmission-turtle

#!/bin/sh
# Usage: transmission-turtle [true|false]
ENDPOINT=http://localhost:9091
CRED='admin:coolpassword'

################################################################################
ENDPOINT=$ENDPOINT/transmission/rpc
HEADER=`curl -s -u "$CRED" -I $ENDPOINT | tr -d "\015" | egrep ^X-Transmission-Session-Id  `
curl -s -H "$HEADER" -u "$CRED" \
 $ENDPOINT -d "{\"method\": \"session-set\",\"arguments\":{\"alt-speed-enabled\":$1}}" | sed -e 's/.*:/ /g; s/["}]//g;'

tt.bash_logout.sh

#!/bin/sh

# If we're the last ssh login deselect the turtle icon in tranmission
if [ -f `which tranmission-turtle 2> /dev/null` ]; then
  ps ax | egrep "^ *$PPID *.*ssh" > /dev/null
  if [ $? -eq 0 ]; then
    # We're in an ssh login
    MY_TTY=`tty | sed 's#.*/##'  `
    who | grep -v $MY_TTY |grep \( > /dev/null
    if [ $? -ne 0 ]; then
      # We're the last ssh connection
      echo -n "🐢De-Turtling Transmission... "
      transmission-turtle false
    fi
  fi
fi

tt.bash_profile.sh

# If we're a fresh ssh login click the turtle icon in tranmission
if [ -f `which tranmission-turtle 2> /dev/null` ]; then
  MY_TTY=`tty | sed 's#.*/##'  `
  who | grep $MY_TTY |grep \( > /dev/null
  if [ $? -eq 0 ]; then
    echo -n "🐢Turtling Transmission... "
    transmission-turtle true
  fi
fi