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Zyxel NSA310 External Network Access Setup: Configuring Dasan H660GW, TP-LINK Archer D5 & No-IP

kadzislaw 5895 20
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How do I set up external access to a Zyxel NSA310 behind two routers (Dasan H660GW and TP-LINK Archer D5) using No-IP?

To access the Zyxel NSA310 from outside, you need a public IP, working upload, and the NAS ports forwarded through the router chain to the NAS's fixed LAN address [#16761810][#16762609] Configure port forwarding on the router that sits in front of the NAS, and if the NAS is behind two routers, forward the same ports on both routers to the Zyxel's local IP (for example 192.168.1.101) [#16761831][#16762732] Also set up No-IP on the main router and on the Zyxel so the hostname points to the current external address [#16761810][#16761793] The thread does not identify one special port that must be used; the important part is that the correct service ports are opened and forwarded to the NAS [#167623?]. If you are trying to use the hostname only inside your home network, NAT loopback matters, but for access from the Internet the server and port forwarding must be configured correctly instead [#18098262][#18098344]
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  • #1 16761739
    kadzislaw
    Level 10  
    Posts: 50
    Board Language: polish
    I give up - I have no chance to grasp it myself.
    I've had the Zyxel NSA310 for a week. As long as everything works fine in the local network. I can't get to him from "The World".
    Configuration.
    Dasan H660GW - this is the main WIFI network, but coverage is not everywhere. After the previous "Internet" I was left with a TP-LINK router - Archer D5 and it is connected to Dasana. Zyxel is connected to TP-LINK. With this TP-LINK, WIFI coverage is much better and basically reaches the entire home - so there is no problem with access to Zyxel. If necessary, I unplug the cable and connect it to Dasana. I have a registered domain on No-Ip, but when I enter all the data in Zyxel, I see an internal and external address, but I can't get to this server from another network. After reading a lot of threads, I was troubled by port forwarding - but I have no clue about it. When buying, I thought that at this price it was equipment for laymen - maybe not super efficient, but easy to use. What and which router do I have to do so that I can get to this server from the external network? Thanks for any info.
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  • #2 16761793
    sosarek

    Level 43  
    Posts: 83875
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    Board Language: polish
    What internet provider?
    Have you set up no-ip service on your router?
    Company Account:
    Z
    Pka, Poznań, 60-850
    Helpful post? Buy me a coffee.
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  • #3 16761805
    kadzislaw
    Level 10  
    Posts: 50
    Board Language: polish
    Ad.1 Supplier - local cable network.
    Ad.2 I did different combinations - the same in the router and the same in Zyxel, different in the router, different in Zyxel - no effects. When I enter all the data in the router - I get that the connection was successful. I can only do it in this TP-LINK, because this Dasan has a very poor configuration menu.
    Link
  • #4 16761810
    sosarek

    Level 43  
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    1. Check if you have public or private IP address and required ports unblocked.
    2. After checking point 1, configure no-ip on main router and Zyxel.
    Company Account:
    Z
    Pka, Poznań, 60-850
    Helpful post? Buy me a coffee.
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  • #5 16761814
    Przemek52o
    Level 7  
    Posts: 37
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    From what I used to do, you need to not redirect the ports but make them available
    It will also be a good option for you to have DHCP turned off (dynamic IP address assignment in the local network, but only on the router where you have a NAS connected (whether via cable or Wi-Fi.
    And to start, it's better to turn off DHCP and then to open ports, and maybe the router itself has "rigid profiles" FTP somewhere
  • #6 16761817
    sosarek

    Level 43  
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    Przemek52o wrote:
    you try not to redirect ports but make them available

    Since when have ports been made available?
    Company Account:
    Z
    Pka, Poznań, 60-850
    Helpful post? Buy me a coffee.
  • #7 16761821
    Przemek52o
    Level 7  
    Posts: 37
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    sosarek wrote:

    Since when have ports been made available?

    I'm sorry I was wrong if I should have taken it in the Wonders of Words
    I meant to unblock the ports on the router and redirect them
  • #8 16761823
    kadzislaw
    Level 10  
    Posts: 50
    Board Language: polish
    Pts. 2 - done - Connection Status: Success
    Pts. 1 - maybe the link from the previous post will tell you something about IP addresses. when it comes to ports - I don't know which to be unblocked - everywhere they write about 80, or 8080, or 8081. Previously, in the Forwarding tab for the Zyxel address in the local network (assigned to MAC), I made the above-mentioned ports available in various configurations - ie for TCP, UDP - protocol. I have no problem what to set in Common Service Port.
    PS We are talking about changes in TP-LINK all the time? - I don't know if it's important, but he's kind of second in line - he's behind this Dasan.
  • #9 16761831
    Przemek52o
    Level 7  
    Posts: 37
    Rate: 5
    Board Language: polish
    It depends on you which router you configure for the NAS server
    Here you have a link on how to redirect ports
    insert the appropriate end of NAS's ip address
    sosarek if I made a mistake like "port sharing" please correct my statement
  • #10 16761850
    kadzislaw
    Level 10  
    Posts: 50
    Board Language: polish
    It doesn't change anything. Tomorrow I will try to deal with the second router.
  • #11 16762609
    KOCUREK1970
    Network and Internet specialist
    Posts: 35122
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    Board Language: polish
    @kadzislaw
    What IP - private or public?

    And you realize that if you want to connect with it from the outside, you need a lot of UPLOAD - what is it now?
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  • #12 16762732
    kadzislaw
    Level 10  
    Posts: 50
    Board Language: polish
    Link
    Dowload cuts my card - not overwhelming. But I think the upload is ok.
    IP - internal Zyxel - 192.168.1.101 - assigned to MAC
    IP - external 5.134.79.109 - i.e. probably public

    I guess you just can't with this hardware configuration.
    I do not know if this will help, but tomorrow I am going to get a fixed IP from the operator. I have made ports available on each router according to the instructions and it does not work - still no access from the outside.
    The only thing that worked (accidentally) is that I don't have to unplug the cable - I have access regardless of which local network I am connected to.
  • #13 18097901
    kgreszczuk
    Level 10  
    Posts: 5
    Board Language: polish
    Welcome.
    I stick to the post. I have recently owned a Zyxel 310 NAS and while in LAN it works fine, I mainly store company-related files on it and I want to share it also to have access to it anywhere. I want to map the drives so that you don't have to log in somewhere there every time.
    The NAS is plugged into the UPC router, which automatically communicated with the server itself and assigned the appropriate ports for it. I set it up with No-ip and it points me to an external IP but I can't connect to it via this number or domain in any way. if someone can help me, give me some tips, I will be grateful :)
  • #14 18098262
    KOCUREK1970
    Network and Internet specialist
    Posts: 35122
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    Board Language: polish
    kgreszczuk wrote:
    I want to map the drives so that you don't have to log in somewhere there every time.

    kgreszczuk wrote:
    I set it up with No-ip and it points me to an external IP but I can't connect to it via this number or domain in any way.

    We map the disks in the local network neighborhood.
    If you want to retrieve a disk from the LAN from the domain, the UPC modemorouter must support NAT Loopback, and you will not do this on any current UPC modemorouter because it does not have such a function.
  • #15 18098277
    kgreszczuk
    Level 10  
    Posts: 5
    Board Language: polish
    Thanks for the answer. This NAT Loopback is IP redirect, correct?
    If I connect a router with such a function to that with UPC, will it talk?
    Second question, can I start FTP without such a router and connect to it via TC or filezille?
  • #16 18098307
    KOCUREK1970
    Network and Internet specialist
    Posts: 35122
    Help: 3786
    Rate: 5326
    Board Language: polish
    kgreszczuk wrote:
    If I connect a router with such a function to that with UPC, will it talk?

    Specify where you want to map this drive - in the LAN or via the Internet?
    If in LAN you map it as a drive mapping in network neighborhood. And if you want to share the disk via the Internet, NAT Loopback is not needed for anything, because you log in to the server's IP or its domain.
    kgreszczuk wrote:
    Second question, can I start FTP without such a router and connect to it via TC or filezille?

    Yes, but then the NAS must be connected directly to the computer and then you will be able to use it only on one computer (where you plug the new NAS).
  • #17 18098317
    kgreszczuk
    Level 10  
    Posts: 5
    Board Language: polish
    This is exactly what I mean to access the NAS via the Internet.
  • #18 18098344
    KOCUREK1970
    Network and Internet specialist
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    Board Language: polish
    This is how I felt ...
    The server itself must be properly configured for external access.
    I don't know if Zyxel doesn't have its own factory domain like Synology / Qnap.
    What's more, a strong UPLOAD is also necessary here.
    If you have less than 20Mb on uploading to the Internet, it will be a pain.
  • #19 18098415
    kgreszczuk
    Level 10  
    Posts: 5
    Board Language: polish
    KOCUREK1970 wrote:
    This is how I felt ...
    The server itself must be properly configured for external access.
    I don't know if Zyxel doesn't have its own factory domain like Synology / Qnap.
    What's more, a strong UPLOAD is also necessary here.
    If you have less than 20Mb on uploading to the Internet, it will be a pain.

    Fortunately, I have a good upload. The domain given in my zyxel310 is something that is not in Polish and by entering the data it does not search for this model anymore. Maybe too old and I have to figure it out differently.
    I have a few more questions for you but I would prefer it privately and there is no forum.
  • #20 18098454
    KOCUREK1970
    Network and Internet specialist
    Posts: 35122
    Help: 3786
    Rate: 5326
    Board Language: polish
    kgreszczuk wrote:
    Just the domain given in my zyxel310 is some kind not in Polish and by entering the data, it does not look for this model anymore

    And what internet are you trying to call up Zyxel's IP address or domain name?
  • #21 18098668
    kgreszczuk
    Level 10  
    Posts: 5
    Board Language: polish
    I wrote to you at PW.

Topic summary

✨ The discussion revolves around configuring external network access for the Zyxel NSA310 NAS device, connected through a Dasan H660GW router and a TP-LINK Archer D5 router. The user is struggling to access the NAS from outside their local network despite successful local connectivity. Key points include the importance of setting up No-IP for dynamic DNS, ensuring public IP visibility, and correctly configuring port forwarding on the routers. Participants suggest checking IP address types, unblocking necessary ports (such as 80, 8080, or 8081), and potentially disabling DHCP on the router connected to the NAS. The conversation also touches on the need for sufficient upload bandwidth for external access and the limitations of certain routers regarding NAT Loopback functionality.
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FAQ

TL;DR: Fix “can’t reach Zyxel NSA310 from the internet” by avoiding double NAT, forwarding the right ports, and running DDNS on the main router. Statistic: upload under 20 Mb will feel slow; “If you have less than 20Mb on uploading…it will be a pain.” [Elektroda, KOCUREK1970, post #18098344]

Why it matters: This FAQ helps home users make Zyxel NSA310 reachable from outside networks without breaking local Wi‑Fi or security.

Quick Facts

How do I fix “Zyxel NSA310 not reachable from the internet” with Dasan H660GW + TP‑LINK Archer D5?

Eliminate double NAT or forward traffic across both routers. Put DDNS on the main router (Dasan). Forward required ports on Dasan to TP‑LINK, then from TP‑LINK to the Zyxel’s static LAN IP. Confirm you have a public IP. Test from an external network, not your home Wi‑Fi. [Elektroda, sosarek, post #16761810]

Which device should run No‑IP (DDNS): router or Zyxel?

Run DDNS on the main, internet‑facing router so the hostname always tracks your WAN IP. You can also enable DDNS on Zyxel as a backup, but the upstream router remains the source of truth for the WAN address. [Elektroda, sosarek, post #16761810]

Do I need a public IP from my ISP for external access?

Yes. Without a public IP, inbound connections cannot reach your network. Ask your ISP to provide a public or static IP if you’re behind CGNAT or a private address. Verify in the router status page and with an external IP checker. [Elektroda, KOCUREK1970, post #16762609]

What is double NAT, and why does it break access?

Double NAT occurs when two routers each translate addresses. Your TP‑LINK sits behind the Dasan, so inbound traffic stops unless you chain port forwards or bridge one device. Symptom: services work on LAN but fail from outside. [Elektroda, kadzislaw, post #16761823]

Which ports should I forward for Zyxel NSA310?

Forward the web UI port you use (commonly 80/8080/8081) and any service ports you enable (e.g., FTP). Point each forward at the Zyxel’s fixed LAN IP. Avoid exposing admin UI broadly; restrict or use a VPN when possible. [Elektroda, kadzislaw, post #16761823]

How do I set up port forwarding on TP‑LINK Archer D5?

Use a simple 3‑step flow: 1. Reserve a static IP for the NAS. 2. Add a Virtual Server entry for the chosen port to the NAS IP. 3. Repeat on the upstream router to the TP‑LINK’s WAN IP. [Elektroda, Przemek52o, post #16761831]

I’m on UPC. Why does my No‑IP domain fail only inside my home?

UPC modems lack NAT loopback. Hostnames that resolve to your public IP won’t connect from your LAN. Test from mobile data or another network, or connect by the NAS’s local IP while at home. “NAT Loopback is not supported on UPC modemorouters.” [Elektroda, KOCUREK1970, post #18098262]

What is NAT loopback in plain English?

It lets you reach your public hostname from inside the same LAN. Without it, your domain looks out to the internet and cannot hairpin back in. Many ISP‑supplied routers omit this, so LAN tests fail while the service works externally. [Elektroda, KOCUREK1970, post #18098262]

Should I disable DHCP on the secondary router?

If the NAS sits behind a second router acting as an access point, disabling its DHCP avoids IP conflicts and simplifies routing. Then only the main router assigns addresses, reducing misroutes during port forwarding. [Elektroda, Przemek52o, post #16761814]

How do I map the NAS as a drive locally vs over the internet?

Map drives on LAN using your NAS’s local IP or hostname. For internet access, you don’t need NAT loopback; connect via public IP or DDNS name. Use SMB/VPN for security, or FTP/SFTP when necessary. [Elektroda, KOCUREK1970, post #18098307]

Is my upload speed really that important for remote access?

Yes. Your upload sets the ceiling for remote download. Expect sluggish transfers below 20 Mb upload. Quote: “If you have less than 20Mb on uploading… it will be a pain.” Plan services accordingly or upgrade. [Elektroda, KOCUREK1970, post #18098344]

Why can’t I reach the NAS even though DDNS says Success?

DDNS only updates the hostname. You must still forward ports through every NAT layer and ensure the ISP gives you a reachable public IP. Also verify you’re testing from an external network, not the LAN without loopback. [Elektroda, kadzislaw, post #16761805]

Can I run FTP without a router at all?

Yes, if you connect the NAS directly to one computer, FTP will work only for that machine. This bypasses routing but removes multi‑device access until you rejoin the LAN. [Elektroda, KOCUREK1970, post #18098307]

Do I need to touch both routers or only TP‑LINK?

With Dasan upstream and TP‑LINK downstream, configure both unless you bridge one. Forward on Dasan to TP‑LINK’s WAN IP, then on TP‑LINK to the NAS. Skipping the first hop leaves inbound traffic blocked. [Elektroda, kadzislaw, post #16761823]

Why do HTTP ports 80/8080/8081 matter on Zyxel?

Zyxel’s web services commonly listen on these ports. Forward only the one you use, and change it if your ISP blocks 80. Document the choice so DDNS tests the correct endpoint later. [Elektroda, kadzislaw, post #16761823]

I got a fixed IP, but access still fails. What’s the edge case?

Static IP helps, but forwarding must still cross all NAT layers. One missed hop or a disabled service on the NAS causes failure. Validate each hop with a port‑check tool and test externally to confirm reachability. [Elektroda, kadzislaw, post #16762732]
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