Does ER605 support single cable connection to ISP modem?
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Can ER605 VPN router be connected to a fiberoptics ISP modem (Sagemcom Fast5670) with one ethernet cable to create a VPN Server in location A, to which I could connect from overseas location B? Or does it have to be connected by 2 ethernet cables input / output (LAN / WAN)? Will it work with single cable connection with ISP modem at all or there need to be a traffic flowing through ER605 in and out using 2 cables? How can I connect / configure it so that it works?
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The ER605 does not have an SFP port, all of its network ports are ordinary Ethernet cable ports.
You need to make sure that the ISP modem on the front end has modulation and demodulation and has converted the optical signal into an electrical signal.
If you are sure that the data coming out of the modem is electrical, then you can consider using a device like Media Converter to bridge the gap（Fibre cable---Ethernet cable）between the modem and the router.
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@Virgo ISP modem has 4 LAN ports, but what I'm unsure, whether I can connect ISP modem from one of its LAN ports via ethernet cable to WAN port of ER605 and whether ER605 can receive internet traffic, create VPN tunnel and send it back to ISP modem using the same ethernet cable. This is location A.
In location B will be VPN Client.
Will the connection work in location A?
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@ocvaa thank you for sharing the link. However, it still doesn't answer my concerns with physical connection to ER605 :/
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Duncho wrote
@ocvaa thank you for sharing the link. However, it still doesn't answer my concerns with physical connection to ER605 :/
Im not sure that I do understand the actual question...
1. You have 1 WAN port on ER605 that connected to ISP (whatever connection type you've got, bottom line you've getting Internet IP there).
2. Configure new VPN Policy as purpose set to Client-to-Site and configure actual VPN type of your preference on ER605.
3. Configure new VPN user on ER605.
4. Go any another location in the world that have an internet access and configure VPN client.
5. Connect from any another location in the world with VPN client to the VPN server - that's all.
I have no idea why you mention another additional cable in the original post.
All the outside (WAN/Internet) in/out connections on ER605 go via 1 physical WAN port connected to ISP (otherwise you use another custom setup).
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@ocvaa Thank you so much, this answer my question: "All the outside (WAN/Internet) in/out connections on ER605 go via 1 physical WAN port connected to ISP (otherwise you use another custom setup"
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@ocvaa So I bought ER605, configured OpenVPN Server to which I can connect from different internet location, however, I have no internet passing through ER605 to VPN Server. Any idea what might be worng?
Do I need to configure any static route so that VPN Server knows that should forward incoming internet from ISP (WAN port) to outgoing tunneled connection leaving on the same WAN port? Many thanks in advance.
System status:
| Interface Name | Connection Type | Connection Status | IP Address | Subnet Mask | MAC Address | Default Gateway | Primary DNS |
|---|
| WAN | Dynamic IP | Link Up | 192.168.3.239 | 255.255.255.0 | xx-xx-xx-xx-32-FF | 192.168.3.254 | 208.67.222.222 |
Routing Table:
| ID | Destination IP | Subnet Mask | Next Hop | Interface | Metric |
|---|
| 1 | 0.0.0.0 | 0.0.0.0 | 192.168.3.254 | WAN | 0 |
| 2 | 10.10.10.2 | 255.255.255.255 | 0.0.0.0 | tun0 | 0 |
| 3 | 127.0.0.0 | 255.0.0.0 | 0.0.0.0 | lo | 0 |
| 4 | 192.168.3.0 | 255.255.255.0 | 0.0.0.0 | WAN | 0 |
| 5 | 208.67.220.220 | 255.255.255.255 | 192.168.3.254 | WAN | 0 |
| 6 | 208.67.222.222 | 255.255.255.255 | 192.168.3.254 | WAN | 0 |
| 7 | 192.168.0.0 | 255.255.255.0 | 0.0.0.0 | LAN | 0 |
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@Duncho no idea - might be wotrh to open another support thread for that specific issue.
Due to different reasons I use L2TP connections to my ER605 so can't really help here 
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