I've finally set up our RV220W to serve our office network, using the following environment:
The WAN is set to a public IP (static configuration), while the internal network consists of two VLANs.
VLAN 1 is connected to the cabled network and one wireless SSID, where DHCP is served by our Windows SBS server (192.168.15.x), and this VLAN is used only for our own office. VLAN 2 is connected to a second wireless SSID, where DHCP is served by the RV220W itself (192.168.17.x), and this VLAN is used for guests and visitors to our office.
On a regular basis, we need to use a mobile device to access a test page from a development server on VLAN 1, and the router is configured to redirect connections on a specific port on the public IP to our development server.
For VLAN 1, I solved this by overriding DNS for the hostname of this test page to use the local IP for the development server.
However, for VLAN 2, there is no way to access this test page.
Is there any way I can configure the router to either redirect these connections, or override the internal DNS so the test page on the development server can be reached also from VLAN 2 (the guest/visitor network)?
When I open the public IP (213.x.x.x) from VLAN 2 (192.168.17.x) in my browser, I get to the router's web based administration interface. Opening the public IP on port 8088 (which should be redirected to the test server from the outside using the router's NAT) simply gives a timeout.
I figured that I probably should have the latest firmware, so I had upgraded the firmware a few hours before your latest response. Firmware installed is now 184.108.40.206 (confirmed from the router's Status/Dashboard page).
I've now even disabled remote management (Administration/Remote Management), in case this might have something to do with it.
Is there something I need to configure specially to allow for hairpin connections?
After editing and saving each rule found under Firewall -> Access Rules, I tried opening https://213.x.x.x/, where I got a 404 error (since the browser probably had cached a redirect to /scgi-bin/platform, which is the router admin). Following a hunch, I opened https://213.x.x.x/owa, which got me to the Outlook Web App for Exchange 2010. Meaning, my connection was redirected via DNAT back to the SBS2011 server on our local network.
I'd also have to admit, until your first reply in this thread, I had never heard of the term "hairpin"/"hairpinning" - thanks for introducing me to the term, which in turn helped me get a major step closer to solving this.
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