Dear all
I have 2 HUAWEI 5G CPE N5368X connecting to MikroTik RB5009UPr+S+ (load balance failover) NTH and I setup both HUAWEI 5G CPE N5368X as bridge.
How to know if am still behind NAT or not.
Best Regards
Compare WAN IP addresses on your Mikrotik to IP address shown by some internet-based service (e.g. https://www.whatismyip.com/ ) … obviously you’ll have to do some tricks get results for both WAN links. If IP addresses are the same, then ISP doesn’t do additional NAT (but may still run firewall so your connection doesn’t have to be completely transparent and open). If addresses are not the same, then you’re behind ISP NAT.
Another hint, pointing in direction of NAT, is WAN IP address on Mikrotik. If it’s one of:
- 10.0.0.0/8 - 10.0.0.0-10.255.255.255 (RFC 1918)
- 172.16.0.0/12 - 172.16.0.0-172.31.255.255 (RFC 1918)
- 192.168.0.0/16 - 192.168.0.0-192.168.255.255 (RFC 1918)
- 100.64.0.0/10 - 100.64.0.0-100.127.255.255 (RFC 6598 - CGNAT)
then ISP does NAT for sure.
[edit] fixed 192.168.0.0/16 network address
see attached..
Both WAN IP addresses are in 10.0.0.0/8 and thus in private “non-routable” IP address space. ISP definitely performs NAT on your traffic.
so in this case it doesn’t matter if I keep both 5G router in bridge mode or not.
Does your provider use IPv6 by chance? That would most likely get you globally routable IPs if getting out from behind NAT is a requirement.