My running vagrant box (ubuntu, on a OS X Mavericks host) has been running fine.
I am trying to set up pgAdmin from the host, and am having trouble opening a new port for the sql traffic.
I added a line to my Vagrantfile (the last one):
config.vm.network "forwarded_port", guest: 3000, host: 8080   # http
config.vm.network :forwarded_port, guest: 35729, host: 35729
config.vm.network "forwarded_port", guest: 5432, host: 7001   # postgres
I ran vagrant provision and bounced the Vagrant box several times. When it reboots the new port forwarding is not listed:
==> default: Clearing any previously set forwarded ports...
==> default: Clearing any previously set network interfaces...
==> default: Preparing network interfaces based on configuration...
    default: Adapter 1: nat
    default: Adapter 2: hostonly
==> default: Forwarding ports...
    default: 3000 => 8080 (adapter 1)
    default: 35729 => 35729 (adapter 1)
    default: 22 => 2222 (adapter 1)
==> default: Running 'pre-boot' VM customizations...
==> default: Booting VM...
==> default: Waiting for machine to boot. This may take a few minutes...
    default: SSH address: 127.0.0.1:2222
    default: SSH username: vagrant
    default: SSH auth method: private key
    default: Warning: Connection timeout. Retrying...
==> default: Machine booted and ready!
Curl gives a negative response also:
➜  ~  curl -v 'http://localhost:7001/'
* Adding handle: conn: 0x7fde1a004400
* Adding handle: send: 0
* Adding handle: recv: 0
* Curl_addHandleToPipeline: length: 1
* - Conn 0 (0x7fde1a004400) send_pipe: 1, recv_pipe: 0
* About to connect() to localhost port 7001 (#0)
*   Trying ::1...
*   Trying 127.0.0.1...
*   Trying fe80::1...
* Failed connect to localhost:7001; Connection refused
* Closing connection 0
curl: (7) Failed connect to localhost:7001; Connection refused
Related posts:
Vagrant Port Forwarding not working
Cannot connect to Postgres running on VM from host machine using MD5 method