Michael,

The OpenVPN server configuration created that route, and routing to the 
"server" seems correct.  Just as the OpenVPN "client" should route to the 
server as well.

I have an AstLinux OpenVPN client to server pair in my lab ...

OpenVPN Server: (using tun0)
pbx ~ # ip route show dev tun0
10.8.1.0/24  proto kernel  scope link  src 10.8.1.1 
192.168.222.0/24 via 10.8.1.1 

OpenVPN Client: (using tun2)
pbx3 ~ # ip route show dev tun2
10.8.1.0/24  proto kernel  scope link  src 10.8.1.2 
192.168.110.0/24 via 10.8.1.1

Ahh BTW, I always use Topology: "[subnet] ..." which should match with server / 
clients.


Lonnie


> On Mar 11, 2020, at 2:45 PM, Michael Knill 
> <michael.kn...@ipcsolutions.com.au> wrote:
> 
> Thanks Lonnie. Just a question which I'm not sure of.
> The Astlinux routing table points 172.16.16.0/24 to its own OpenVPN address 
> (172.16.16.0/24 via 172.28.253.1 dev tun0). Is this correct? 
> Shouldn't it point to the remote site OpenVPN address or is this how it works?
> 
> Regards
> Michael Knill
> 
> On 11/3/20, 11:39 pm, "Lonnie Abelbeck" <li...@lonnie.abelbeck.com> wrote:
> 
>    Hi Michael,
> 
>    If you were using AstLinux instead of the Mikrotik in your home office I 
> would point you to the Firewall tab ...
> 
>    Network -> Firewall Configuration -> Firewall Options:
> 
>    ___ Allow OpenVPN Client tunnel to the [ 1st ] LAN Interface(s)
> 
>    ___ Allow OpenVPN Server tunnel to the [ 1st ] LAN Interface(s)
> 
> 
>    So, for the Mikrotik it may be a similar firewall "forwarding" rule for 
> the OpenVPN 'tun' interface <-> LAN interface.
> 
>    BTW, the proper OpenVPN config (your's looks good at a quick glance) will 
> add the needed routes automatically.
> 
>    Lonnie
> 
> 
> 
>> On Mar 11, 2020, at 6:31 AM, Michael Knill 
>> <michael.kn...@ipcsolutions.com.au> wrote:
>> 
>> Hi Group
>> 
>> I have been trying out Mikrotik’s RouterOS v7 specifically to test UDP 
>> OpenVPN.
>> I have set up OpenVPN from my Home Office router (OpenVPN Client) to my 
>> hosted Astlinux (OpenVPN Server) for telephony purposes only.
>> The connection has come up fine and I can ping the OpenVPN addresses each 
>> way from the terminating devices but I cant for the life of me get 
>> connectivity working from the Home Office LAN to the Astlinux OpenVPN 
>> address.
>> OpenVPN Subnet: 172.28.253.0/24. Astlinux gateway .1
>> Home Office LAN: 172.16.16.0/24
>> 
>> I have set up the iroute file:
>> 3000-IPC_Prod-CM1 kd # cat openvpn/ccd/IPC_Home_Office
>> iroute 172.16.16.0 255.255.255.0
>> 
>> 3000-IPC_Prod-CM1 kd # ip route
>> default via 221.121.132.145 dev eth0
>> 172.16.16.0/24 via 172.28.253.1 dev tun0
>> 172.28.253.0/24 dev tun0  proto kernel  scope link  src 172.28.253.1
>> .......
>> 
>> ### gui.openvpn.conf - start ###
>> ###
>> ### Auth Method
>> OVPN_USER_PASS_VERIFY="no"
>> ### Device
>> OVPN_DEV="tun0"
>> ### Port Number
>> OVPN_PORT="1194"
>> ### Protocol
>> OVPN_PROTOCOL="udp"
>> ### Log Verbosity
>> OVPN_VERBOSITY="4"
>> ### Compression
>> OVPN_LZO="no"
>> ### QoS Passthrough
>> OVPN_QOS="yes"
>> ### Cipher
>> OVPN_CIPHER=""
>> ### Auth HMAC
>> OVPN_AUTH=""
>> ### Allowed External Hosts
>> OVPN_TUNNEL_HOSTS="0/0"
>> ### Client Isolation
>> OVPN_CLIENT_ISOLATION="no"
>> ### Server Hostname
>> OVPN_HOSTNAME="30000.ipcaccess.net"
>> ### Server IPv4 Network
>> OVPN_SERVER="172.28.253.0 255.255.255.0"
>> ### Server IPv6 Network
>> OVPN_SERVERV6=""
>> ### Topology
>> OVPN_TOPOLOGY="subnet"
>> ### Server Push
>> OVPN_PUSH="
>> "
>> ### Raw Commands
>> OVPN_OTHER="
>> topology p2p
>> route-gateway 172.28.253.1
>> route 172.16.16.0 255.255.255.0
>> "
>> ### Private Key Size
>> OVPN_CERT_KEYSIZE="2048"
>> ### Signature Algorithm
>> OVPN_CERT_ALGORITHM="sha256"
>> ### CA File
>> OVPN_CA="/mnt/kd/openvpn/webinterface/keys/ca.crt"
>> ### CERT File
>> OVPN_CERT="/mnt/kd/openvpn/webinterface/keys/server.crt"
>> ### Key File
>> OVPN_KEY="/mnt/kd/openvpn/webinterface/keys/server.key"
>> ### DH File
>> OVPN_DH="/mnt/kd/openvpn/webinterface/dh1024.pem"
>> ### TLS-Auth File
>> OVPN_TA=""
>> ### Valid Clients
>> OVPN_VALIDCLIENTS="
>> ...........
>> IPC_Home_Office
>> "
>> ### gui.openvpn.conf - end ###
>> 
>> I have looked at the firewall log on the Mikrotik and nothing comes up as 
>> being denied. Any ideas on where to go next?
>> Yes I realise it's a Beta version but as I can ping the OpenVPN address each 
>> way, it just seems to be a routing problem.
>> 
>> Thanks all.
>> 
>> Regards
>> Michael Knill
>> _______________________________________________
>> Astlinux-users mailing list
>> Astlinux-users@lists.sourceforge.net
>> https://lists.sourceforge.net/lists/listinfo/astlinux-users
>> 
>> Donations to support AstLinux are graciously accepted via PayPal to 
>> pay...@krisk.org.
> 
> 
> 
>    _______________________________________________
>    Astlinux-users mailing list
>    Astlinux-users@lists.sourceforge.net
>    https://lists.sourceforge.net/lists/listinfo/astlinux-users
> 
>    Donations to support AstLinux are graciously accepted via PayPal to 
> pay...@krisk.org.
> 
> 
> _______________________________________________
> Astlinux-users mailing list
> Astlinux-users@lists.sourceforge.net
> https://lists.sourceforge.net/lists/listinfo/astlinux-users
> 
> Donations to support AstLinux are graciously accepted via PayPal to 
> pay...@krisk.org.



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