i have 22 sites to interconnect. linux has just 8 [i]tun[/i] devices. [b]suggestions?[/b] [b]no log or config files yet[/b] ... just planning and evaluating possibilities. a separate linux box (ubuntu 14.04.2 LTS) is planned for each site. i am wanting to make each site connect to all 21 other sites for [u]462 total connections[/u]. UDP is possible as long as the [i]source[/i] port is, or can be set to, 1194. all 22 sites already have the same private IPs (192.168.1.0/24) and [u]renumbering is not an option[/u]. so i am thinking to use NAT in these 22 boxes and make each site [i]appear[/i] as new IPs such as 192.168.1XX.0/24

advice needed: is OpenVPN suitable?

Skaperen

i have 22 sites to interconnect. linux has just 8 tun devices. suggestions?

no log or config files yet ... just planning and evaluating possibilities. a separate linux box (ubuntu 14.04.2 LTS) is planned for each site. i am wanting to make each site connect to all 21 other sites for 462 total connections. UDP is possible as long as the source port is, or can be set to, 1194.

all 22 sites already have the same private IPs (192.168.1.0/24) and renumbering is not an option. so i am thinking to use NAT in these 22 boxes and make each site appear as new IPs such as 192.168.1XX.0/24

Traffic

Skaperen wrote linux has just 8 tun devices. suggestions?

You only need one ..

Skaperen wrotei am wanting to make each site connect to all 21 other sites for 462 total connections

You could do this but it will be a monumental headache to manage.

The recommended way is to nominate a server machine and have all the others connect to it as clients. You could have a couple of servers so that you have a backup ..

Skaperen wroteall 22 sites already have the same private IPs (192.168.1.0/24) and renumbering is not an option. so i am thinking to use NAT

Good luck with that ..

OpenVPN has some basic built-in NAT functionality,
see --client-nat in The Manual v23x