NBN Remote Access Reality Checker: Can You Actually Access Your NAS Remotely?
This NBN remote access reality checker determines whether you can reliably access your NAS from outside your home based on your ISP, NBN connection type, and CGNAT status. Identifies whether you need a VPN, Tailscale, or reverse proxy to work around restrictions.
Find out exactly what remote access methods will work (and won't) for your NBN connection, including whether you're blocked by CGNAT and what to do about it.
Most remote access guides assume you can forward ports. In Australia, that assumption is wrong for a large portion of NBN users. Telstra, Optus, and Belong use CGNAT on all consumer plans, blocking traditional port forwarding entirely. Even ISPs without CGNAT face upload speed limits that restrict what's practically usable.
This tool is a logic tree, not a calculator. It takes your NBN type, tier, and ISP, and tells you exactly what works, what doesn't, and which workarounds apply to your situation. See also our NAS Remote Access Guide for a full walkthrough.
Your Connection
What do you want to do? (select all that apply)
Your Verdict
Checking…
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How to check for CGNAT manually:
Open a browser, search "what is my IP", note the IP shown. Then check your router's WAN IP in its admin page (usually 192.168.0.1). If they match, you're probably not behind CGNAT. If the router WAN IP starts with 100.x.x.x, you ARE behind CGNAT.
Use Case Verdicts
Select use cases on the left to see verdicts.
Recommended Workarounds
AU ISP CGNAT Status Reference
CGNAT (Carrier-Grade NAT) blocks traditional port forwarding. AU-specific, caused by NBN Co IPv4 scarcity policy. ISP CGNAT policies verified March 2026. Always verify with your ISP as policies can change.
ISP
CGNAT?
Static IP Available?
Notes
Aussie Broadband
No (confirmed)
Yes (~$5/mo)
Best ISP for NAS remote access
Superloop
No (confirmed)
Yes (check ISP)
Good power user option
Internode
No (most plans)
Yes (~$10/mo)
Check entry plans
iiNet
No (most plans)
Yes (~$10/mo)
Owned by TPG, similar policy
TPG
Partial
Yes (premium)
Depends on plan tier
Telstra
Yes (all consumer)
Business only
No static IP for consumer NBN
Optus
Yes (all consumer)
No
CGNAT on all consumer plans
Belong
Yes
No
Budget Telstra brand
Spintel
No
Yes (~$5/mo)
Small ISP, power user friendly
Tangerine
Yes (entry plans)
No
Budget ISP
Launtel
No
Yes (free on some plans)
Excellent for power users, Tas-based
NBN Upload Speed & Remote Access
Plan
Upload Mbps
File Access
1080p Plex
4K Plex
NBN 25
5 Mbps
Limited
1 stream (tight)
No
NBN 50
20 Mbps
Good
2 streams
1 stream
NBN 100
20 Mbps
Good
2 streams
1 stream
NBN 250
25 Mbps
Good
3 streams
1 stream
NBN 1000
50 Mbps
Excellent
5+ streams
2-3 streams
Fixed Wireless
5-20 Mbps
OK
1-2 streams
Limited
Sky Muster
5 Mbps
Very limited
No
No
Starlink
10-20 Mbps
Good
1-2 streams
Limited
The single biggest limitation for AU NAS remote access is upload speed, not CGNAT. Even without CGNAT, NBN 100 only gives 20 Mbps upload. Use our Transfer Speed Estimator to assess your connection. Rates and CGNAT status verified March 2026.
Frequently Asked Questions
CGNAT (Carrier-Grade NAT) is how NBN providers share a limited pool of IPv4 addresses across many customers. When you're behind CGNAT, multiple households share the same public IP address, which means you can't forward ports to your NAS. This is why "just forward port 5001" doesn't work for many AU NBN users. Telstra, Optus, and Belong use CGNAT on all consumer plans. The 100.64.0.0/10 address range is the IANA-reserved CGNAT space. If your router's WAN IP starts with 100.x.x.x, you're behind CGNAT.
As of March 2026: CGNAT confirmed: Telstra (all consumer), Optus (all consumer), Belong, Tangerine (entry plans). No CGNAT: Aussie Broadband, Superloop, Internode (most plans), iiNet (most plans), Spintel, Launtel. Partial: TPG (depends on plan tier). Always verify with your ISP as policies change. Aussie Broadband is widely regarded as the best AU ISP for NAS remote access: no CGNAT and static IP for ~$5/month.
Tailscale is a P2P mesh VPN that works through CGNAT. It installs on your NAS and remote devices, creating an encrypted tunnel that bypasses port forwarding requirements entirely. It uses DERP relay servers (including one in Sydney) when direct P2P isn't possible. Free for personal use (up to 3 users, 100 devices). Works with Synology DSM 7 and QNAP QTS. It's the most recommended CGNAT workaround for AU home NAS users.
Yes. Significantly. Even without CGNAT, NBN 100 gives only 20 Mbps upload. This supports one 1080p Plex stream but not two simultaneous 4K streams. NBN 25 gives just 5 Mbps upload: file access only, no streaming. If remote Plex streaming is your primary use case, NBN 250 (25 Mbps upload) or NBN 1000 (50 Mbps upload) make a meaningful difference. Fixed wireless and satellite are especially limited.
Yes. Synology QuickConnect and QNAP myQNAPcloud are cloud relay services built into the NAS OS. They work through CGNAT because the connection is outbound from your NAS to the vendor's servers. This works for file access, mobile apps, and monitoring, but routes all traffic through Synology's or QNAP's servers, which is slower than a direct connection and requires a vendor account.
Open a browser and search "what is my IP" and note the IP shown. Then check your router's WAN IP in its admin page (usually 192.168.0.1 or 192.168.1.1). If they match, you're probably not behind CGNAT. If your router's WAN IP starts with 100.x.x.x, you ARE behind CGNAT. The 100.64.0.0/10 range is the IANA-reserved CGNAT address space.