# Error: Bridge address is not valid
**URL:** https://forum.torproject.org/t/error-bridge-address-is-not-valid/18775
**Category:** Relay Operator
**Tags:** tor-browser, tor
**Created:** [May 6, 2025, 4:17pm UTC](https://forum.torproject.org/t/error-bridge-address-is-not-valid/18775 "2025-05-06T16:17:50Z")
**Posts on this page:** 13
**Page:** 1
### Author:  [@fortuna](https://forum.torproject.org/u/fortuna)
#### Post date: [May 6, 2025, 4:17pm UTC](https://forum.torproject.org/t/error-bridge-address-is-not-valid/18775/1 "2025-05-06T16:17:50Z")
Tor was running fine until I had to move it behind a NAT due to a new ISP. Now [https://bridges.torproject.org/status](https://bridges.torproject.org/status?id=2ACD1216E085BA19A9BB39EAC3FE17CD27694A2D) gives:
```auto
* obfs4 IPv4: dysfunctional
Error: Bridge address is not valid
Last tested: 2025-05-06 15:43:27.10717811 +0000 UTC m=+507600.927118816 (5m56.313901198s ago)
```
This is the relevant part of torrc:
```auto
Address ********
ORPort 29013 IPv4Only
AddressDisableIPv6 1
```
I tried Address with both the public IP address and the domain name. Neither works.
Funny thing is that Tor is working fine using either its internal SocksPort or using the bridge address in a Tor browser.
Searching for “Bridge address is not valid” with duckduckgo gives no results 😢.
Any idea?
---
### Author:  [@fortuna](https://forum.torproject.org/u/fortuna)
#### Post date: [May 9, 2025, 10:10am UTC](https://forum.torproject.org/t/error-bridge-address-is-not-valid/18775/2 "2025-05-09T10:10:24Z")
This can only be a bug, right? If the bridge address wasn’t valid, it would be impossible to use it in a Tor browser, correct?
---
### Author:  [@fortuna](https://forum.torproject.org/u/fortuna)
#### Post date: [May 13, 2025, 4:49pm UTC](https://forum.torproject.org/t/error-bridge-address-is-not-valid/18775/3 "2025-05-13T16:49:18Z")
But because [the tor bridge status page](https://bridges.torproject.org/status?id=2ACD1216E085BA19A9BB39EAC3FE17CD27694A2D) says that this bridge is dysfunctional, it won’t be offered to anyone, will it?
The error “Bridge address is not valid” started to emerge after changing ISP. Is the IPv6 causing the trouble?
---
### Author:  [@gus](https://forum.torproject.org/u/gus)
#### Post date: [May 13, 2025, 11:02pm UTC](https://forum.torproject.org/t/error-bridge-address-is-not-valid/18775/4 "2025-05-13T23:02:05Z")
> [@fortuna](#):
>
> But because [the tor bridge status page](https://bridges.torproject.org/status?id=2ACD1216E085BA19A9BB39EAC3FE17CD27694A2D) says that this bridge is dysfunctional, it won’t be offered to anyone, will it?
Correct, dysfunctional bridges aren’t distributed.
> [@fortuna](#):
>
> I tried Address with both the public IP address and the domain name. Neither works.
Is it a dynamic IP? The domain name should work.
---
### Author:  [@fortuna](https://forum.torproject.org/u/fortuna)
#### Post date: [May 15, 2025, 9:59am UTC](https://forum.torproject.org/t/error-bridge-address-is-not-valid/18775/5 "2025-05-15T09:59:31Z")
Thank you for taking the time to help.
> [@gus](#):
>
> Is it a dynamic IP? The domain name should work.
Yes. It is a dynamic IP. But maybe I expressed myself incorrectly. Tor works with both the public IP address and the domain name. The problem is that the message [here](https://bridges.torproject.org/status?id=2ACD1216E085BA19A9BB39EAC3FE17CD27694A2D) is always:
```auto
* obfs4 IPv4: dysfunctional
Error: Bridge address is not valid
```
which is clearly not good because it means that the bridge is not distributed as you confirmed.
It doesn’t change whatever I do. It was functional before changing ISP. Bizarre isn’t it?
---
### Author:  [@fortuna](https://forum.torproject.org/u/fortuna)
#### Post date: [May 19, 2025, 9:30am UTC](https://forum.torproject.org/t/error-bridge-address-is-not-valid/18775/6 "2025-05-19T09:30:33Z")
Who can tell what causes this message?
```auto
* obfs4 IPv4: dysfunctional
Error: Bridge address is not valid
```
Is it related to CGNAT? The current ISP cancelled it after my request to do so, but by default it was enabled.
---
### Author:  [@meskio](https://forum.torproject.org/u/meskio)
#### Post date: [May 20, 2025, 2:35pm UTC](https://forum.torproject.org/t/error-bridge-address-is-not-valid/18775/7 "2025-05-20T14:35:02Z")
Your bridge is publishing an address 192.168.0.x as it’s address. This is a local network address and is not reachable from the internet.
You need to configure the bridge with a public IP address, and have your obfs4 port reachable over internet. I don’t think you’ll be able to do that if you have CGNAT, as you’ll not be able to open any ports. But if you have disabled CGNAT you should be able to do it.
---
### Author:  [@fortuna](https://forum.torproject.org/u/fortuna)
#### Post date: [May 20, 2025, 6:34pm UTC](https://forum.torproject.org/t/error-bridge-address-is-not-valid/18775/8 "2025-05-20T18:34:44Z")
Thank you for taking the time to help.
> [@meskio](#):
>
> Your bridge is publishing an address 192.168.0.x as it’s address.
That would explain everything. Can you tell me where you see that?
---
### Author:  [@meskio](https://forum.torproject.org/u/meskio)
#### Post date: [May 21, 2025, 10:11am UTC](https://forum.torproject.org/t/error-bridge-address-is-not-valid/18775/9 "2025-05-21T10:11:00Z")
> Can you tell me where you see that?
I saw it in the rdsys server (our bridge distribution system), but is not something people can look into themselves. The IP of the bridges is not public.
---
### Author:  [@fortuna](https://forum.torproject.org/u/fortuna)
#### Post date: [May 21, 2025, 5:54pm UTC](https://forum.torproject.org/t/error-bridge-address-is-not-valid/18775/10 "2025-05-21T17:54:40Z")
Interesting!
Can you check again?
---
### Author:  [@fortuna](https://forum.torproject.org/u/fortuna)
#### Post date: [May 29, 2025, 4:22am UTC](https://forum.torproject.org/t/error-bridge-address-is-not-valid/18775/11 "2025-05-29T04:22:06Z")
The problem was solved after changing:
`ServerTransportListenAddr obfs4 192.168.0.2:29014`
into:
`ServerTransportListenAddr obfs4 0.0.0.0:29014`
---
### Author:  [@gus](https://forum.torproject.org/u/gus)
#### Post date: [May 29, 2025, 11:15am UTC](https://forum.torproject.org/t/error-bridge-address-is-not-valid/18775/12 "2025-05-29T11:15:39Z")
Nice! Thank you for running a bridge! ❤
---
### Author:  [@system](https://forum.torproject.org/u/system)
#### Post date: [May 30, 2025, 11:16am UTC](https://forum.torproject.org/t/error-bridge-address-is-not-valid/18775/13 "2025-05-30T11:16:37Z")
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