The host cannot SSH the guest, but the guest can

This is a follow-up question from: Getting virtualbox to get a different IP address than my laptop . I ended up using these files /etc/hostson both my laptop (host) running Ubuntu 14.04 and my virtual machine (guest) running Ubuntu 14.04 :

127.0.0.1   localhost
127.0.1.1   gsamaras  // gsamaras-VirtualBox
192.168.1.2 master    // the host
192.168.1.9 slave-1   // the guest

I got the IP through this answer . When I set virtualbox to eth0 it doesn't return anything and the network seems to be disconnected, so in virtualbox I have the following settings:

Device -> Network -> Bridged Adapter (name wlan0)

I can use to switch from guest to host ssh master, but when on master I get:

gsamaras@gsamaras:~$ ssh slave-1
ssh: connect to host slave-1 port 22: Connection refused

Also note that on guest I get:

gsamaras@gsamaras-VirtualBox:~$ ssh localhost
ssh: connect to host localhost port 22: Connection refused

How to solve?

edit:

From the guest :

gsamaras@gsamaras-VirtualBox:~$ netstat -an | grep -w LISTEN | grep -w 22
gsamaras@gsamaras-VirtualBox:~$

From the master :

gsamaras@gsamaras:~$ ping slave-1
PING slave-1 (192.168.1.9) 56(84) bytes of data.
64 bytes from slave-1 (192.168.1.9): icmp_seq=1 ttl=64 time=0.360 ms