Your problem seems to be network connection issue.
And please note that Ubuntu 17.10 will EOL soon, consider to upgrade it to 18.04 LTS.
On my 18.04 LTS system I get the following:
mate@bionic:~$ snap install --classic anbox-installer
anbox-installer 1 from 'morphis' installed
mate@bionic:~$ anbox-installer
The anbox-installer is deprecated. Please find updated installation
instructions here https://github.com/anbox/anbox/blob/master/docs/install.md
For any further questions please ask on the #anbox IRC channel on the
FreeNode network or in the Anbox telegram group (https://t.me/anbox).
Visiting https://github.com/anbox/anbox/blob/master/docs/install.md gives us new installation instruction:
sudo add-apt-repository ppa:morphis/anbox-support
sudo apt update
sudo apt install anbox-modules-dkms
sudo modprobe ashmem_linux
sudo modprobe binder_linux
snap install --devmode --beta anbox
Then consult official documentation about software installation or simply run anbox.appmgr
.