Networking confusion

[Falconevo]

2 minutes ago, Alaradia said:

depending on your isp they don't support it or allow it and force you to use only their modem router wifi combos

I have come across modem/router devices that don't support it, I am yet to find an ISP that doesn't allow for it as I have worked for most in the UK in my 'youth'

[PeachyUwUSenpai]

28 minutes ago, Falconevo said:

I have come across modem/router devices that don't support it, I am yet to find an ISP that doesn't allow for it as I have worked for most in the UK in my 'youth'

this is canada its a wild and savage land

[leadeater]

NAT once and only once, doesn't matter if double NAT or more works the NAT once rule is pretty fundamental to networking. You gain nothing by NAT'ing more than once and only introduce more problems.

[brwainer]

10 minutes ago, leadeater said:

NAT once and only once, doesn't matter if double NAT or more works the NAT once rule is pretty fundamental to networking. You gain nothing by NAT'ing more than once and only introduce more problems.

I take it you are against CGNat aka NAT444 then? Personally I'm against it because unlike a user-caused double NAT situation, the user can't do anything about the first layer of NAT.

[leadeater]

1 minute ago, brwainer said:

I take it you are against CGNat aka NAT444 then? Personally I'm against it because unlike a user-caused double NAT situation, the user can't do anything about the first layer of NAT.

Yep, that is networking cancer. It's barely acceptable to use it on mobile networks but a band aid fix is a band aid fix and should be viewed as a temporary solution to the real one, IPv6.

 

Edit:

Also carrier grade NAT, LOL. NAT is still NAT no matter how you try and dress it up 

[dalekphalm]

19 hours ago, Alaradia said:

this is canada its a wild and savage land

You're talking about a pretty niche problem. A lot of typical Modems provided by the biggest ISP's allow Bridge Mode - I have Rogers Cable and I'm using my Modem in Bridge Mode with a TP-Link Router, with zero issues.

 

Furthermore, if the Modem doesn't have a bridge mode, you're better off taking the third party router and turning it into AP/Switch only mode (Either through a setting change, or by manually disabling DHCP, NAT, etc).

 

While double (and higher) NAT can work, there are very VERY FEW situations where you should do it. And you definitely shouldn't recommend it to other people unless they have a technical reason why it MUST be used.

[PeachyUwUSenpai]

6 hours ago, dalekphalm said:

You're talking about a pretty niche problem. A lot of typical Modems provided by the biggest ISP's allow Bridge Mode - I have Rogers Cable and I'm using my Modem in Bridge Mode with a TP-Link Router, with zero issues.

 

Furthermore, if the Modem doesn't have a bridge mode, you're better off taking the third party router and turning it into AP/Switch only mode (Either through a setting change, or by manually disabling DHCP, NAT, etc).

 

While double (and higher) NAT can work, there are very VERY FEW situations where you should do it. And you definitely shouldn't recommend it to other people unless they have a technical reason why it MUST be used.

i'm not recommending people do it i'm just saying while there's not many good reasons to have a double nat if you already have one thats working fine there's also no reason to take the effort to make it a single nat and instead of of answering the question asked by the op he was just focusing on the double nat which wasn't the issue