vpn_fix.sh

#!/usr/bin/env bash
# You must have sudo ability on your machine
machine=$1
if [ -z $machine ]; then
  echo "usage $0 {machine_name}"
  exit
fi
docker-machine ls | grep ${machine}
if [ $? == 1 ]; then
  echo "${machine} is not a docker-machine"
  exit 1
fi
dm_ip=`docker-machine ip ${machine} | awk -F. '{print $1"."$2"."$3}'` 
fwrule=`sudo ipfw -a list | grep "deny ip from any to any"`
fwrule_id=`echo $fwrule | awk '{ print $1 }'`
if [ "$fwrule" != "" ]; then
    echo "Found blocking firewall rule: $(tput setaf 1)${fwrule}$(tput sgr0)"
    printf "Deleting rule ${fwrule_id} ... "
    sudo ipfw delete ${fwrule_id}
    if [ $? == 0 ]; then
	echo "$(tput setaf 2)[OK]$(tput sgr0)"
    else
    echo "$(tput setaf 1)[FAIL]$(tput sgr0)"
        exit 1
    fi
else
    echo "No rules found. You are good to go"
fi
docker_interface=$(VBoxManage showvminfo ${machine} | grep -o -E 'vboxnet\d\d?')
if [ -z "${docker_interface}" ]; then
    echo "No docker VM found!"
    exit 1
else
    echo "Found docker interface at $(tput setaf 1)${docker_interface}$(tput sgr0). Changing routes ..."
    current_route=$(sudo netstat -rn | grep ${dm_ip})
    if [ -z "${current_route}" ]; then
        # no route, let's add it!
        sudo route -nv add -net ${dm_ip} -interface ${docker_interface}
    else
        sudo route -nv change -net ${dm_ip} -interface ${docker_interface}
    fi
 
    if [ $? == 0 ]; then
        echo "$(tput setaf 2)[OK]$(tput sgr0)"
    else
        echo "$(tput setaf 1)[FAIL]$(tput sgr0)"
        exit 1
    fi
fi

Thanks for writing this script. However I'm it's not helping me with using docker-machine and Cisco Anyconnect. When I use this script with the instructions you provided here:
boot2docker/boot2docker#392 (comment)
I get this:

time="2015-04-06T19:09:47-04:00" level="error" msg="error getting state for host dockervm: machine does not exist"
time="2015-04-06T19:09:47-04:00" level="error" msg="error getting URL for host dockervm: machine does not exist"
dockervm * virtualbox Error
No rules found. You are good to go
VBoxManage: error: Could not find a registered machine named 'dockervm'
VBoxManage: error: Details: code VBOX_E_OBJECT_NOT_FOUND (0x80bb0001), component VirtualBox, interface IVirtualBox, callee nsISupports
VBoxManage: error: Context: "FindMachine(Bstr(VMNameOrUuid).raw(), machine.asOutParam())" at line 2611 of file VBoxManageInfo.cpp
No docker VM found!

'dockervm' is the name of my virtual machine that I created with docker-machine. For some reason, it seems like it's not being recognized by your script as a valid machine name. Here is some info about my setup:

docker version:
Client version: 1.5.0
Client API version: 1.17
Go version (client): go1.4.1
Git commit (client): a8a31ef
OS/Arch (client): darwin/amd64
Server version: 1.5.0
Server API version: 1.17
Go version (server): go1.4.1
Git commit (server): a8a31ef

docker-machine version 0.1.0
MacOS X 10.8.5

@tony-garcia, I had similar output to yours when I ran this script with sudo. When running as my normal account, without sudo, it appeared to work fine.

On my OS X 10.10.5 machine with Junos Pulse Secure, I had to remove and add routes for the entire /24 IP range. I also added some checks to see if ipfw exists since it's been replaced with pf. My version of this script doesn't currently support removal of pf rules, but I may add that in later. LINK TO GIST