Scan Instant Failed on IPv6 ULA Address

[Chapoly1305]

Describe the bug
The scan on a given ULA IPv6 address immediately failed without useful debugging information.

To Reproduce
Exact Steps to reproduce the behavior:

1. Setup Open Thread Borader Router and Join a Thread Network
2. Scan an address within this Thread network

Expected behavior
Scan shall complete, as Nmap given proper scanned results.
Or, give a meaningful debug message, assist debug any potential setup issue.

Desktop (please complete the following information):

• Ubuntu 22.04, X86-64

Additional context

chen@chen-virtual-machine:~$ nmap -6 fd52:8844:886a:fca9:c1a:4a93:2099:80fa -p- -Pn 
Starting Nmap 7.80 ( https://nmap.org ) at 2025-04-27 12:41 EDT
Nmap scan report for fd52:8844:886a:fca9:c1a:4a93:2099:80fa
Host is up (0.0059s latency).
Not shown: 65531 closed ports
PORT      STATE    SERVICE
49152/tcp open     unknown
49200/tcp open     unknown
62078/tcp open     iphone-sync
64691/tcp filtered unknown

Nmap done: 1 IP address (1 host up) scanned in 14.20 seconds


chen@chen-virtual-machine:~$ sudo docker run --net=host -it --rm --name rustscan rustscan/rustscan:latest -b 10 -p 22,80,443 -a fd52:8844:886a:fca9:c1a:4a93:2099:80fa -- -6 -Pn
Unable to find image 'rustscan/rustscan:latest' locally
latest: Pulling from rustscan/rustscan
c6a83fedfae6: Pull complete 
d9bd24e2554c: Pull complete 
582df0bcf6ab: Pull complete 
Digest: sha256:1a0137749007f12880c7174c65e9f16835106a787ebc952118c2f9f4ff7a1309
Status: Downloaded newer image for rustscan/rustscan:latest
.----. .-. .-. .----..---.  .----. .---.   .--.  .-. .-.
| {}  }| { } |{ {__ {_   _}{ {__  /  ___} / {} \ |  `| |
| .-. \| {_} |.-._} } | |  .-._} }\     }/  /\  \| |\  |
`-' `-'`-----'`----'  `-'  `----'  `---' `-'  `-'`-' `-'
The Modern Day Port Scanner.
________________________________________
: http://discord.skerritt.blog         :
: https://github.com/RustScan/RustScan :
 --------------------------------------
Port scanning: Making networking exciting since... whenever.

[~] The config file is expected to be at "/home/rustscan/.rustscan.toml"
[~] File limit higher than batch size. Can increase speed by increasing batch size '-b 1048476'.
[!] Looks like I didn't find any open ports for fd52:8844:886a:fca9:c1a:4a93:2099:80fa. This is usually caused by a high batch size.
        
*I used 10 batch size, consider lowering it with 'rustscan -b <batch_size> -a <ip address>' or a comfortable number for your system.
        
 Alternatively, increase the timeout if your ping is high. Rustscan -t 2000 for 2000 milliseconds (2s) timeout.

chen@chen-virtual-machine:~$ ping6 fd52:8844:886a:fca9:c1a:4a93:2099:80fa 
PING fd52:8844:886a:fca9:c1a:4a93:2099:80fa(fd52:8844:886a:fca9:c1a:4a93:2099:80fa) 56 data bytes
64 bytes from fd52:8844:886a:fca9:c1a:4a93:2099:80fa: icmp_seq=1 ttl=64 time=4.83 ms
64 bytes from fd52:8844:886a:fca9:c1a:4a93:2099:80fa: icmp_seq=2 ttl=64 time=24.1 ms
64 bytes from fd52:8844:886a:fca9:c1a:4a93:2099:80fa: icmp_seq=3 ttl=64 time=2.35 ms
64 bytes from fd52:8844:886a:fca9:c1a:4a93:2099:80fa: icmp_seq=4 ttl=64 time=72.5 ms
^C
--- fd52:8844:886a:fca9:c1a:4a93:2099:80fa ping statistics ---
4 packets transmitted, 4 received, 0% packet loss, time 3005ms
rtt min/avg/max/mdev = 2.346/25.938/72.470/28.154 ms
chen@chen-virtual-machine:~$ sudo docker run --net=host -it --rm --name rustscan rustscan/rustscan:latest -b 1 -p 22,80,443 -a fd52:8844:886a:fca9:c1a:4a93:2099:80fa -- -6 -Pn
.----. .-. .-. .----..---.  .----. .---.   .--.  .-. .-.
| {}  }| { } |{ {__ {_   _}{ {__  /  ___} / {} \ |  `| |
| .-. \| {_} |.-._} } | |  .-._} }\     }/  /\  \| |\  |
`-' `-'`-----'`----'  `-'  `----'  `---' `-'  `-'`-' `-'
The Modern Day Port Scanner.
________________________________________
: http://discord.skerritt.blog         :
: https://github.com/RustScan/RustScan :
 --------------------------------------
Breaking and entering... into the world of open ports.

[~] The config file is expected to be at "/home/rustscan/.rustscan.toml"
[~] File limit higher than batch size. Can increase speed by increasing batch size '-b 1048476'.
[!] Looks like I didn't find any open ports for fd52:8844:886a:fca9:c1a:4a93:2099:80fa. This is usually caused by a high batch size.
        
*I used 1 batch size, consider lowering it with 'rustscan -b <batch_size> -a <ip address>' or a comfortable number for your system.
        
 Alternatively, increase the timeout if your ping is high. Rustscan -t 2000 for 2000 milliseconds (2s) timeout.

[PsypherPunk]

Thanks, @Chapoly1305. Do you have the means to run RustScan directly without Docker?

Trying to replicate this but it seems to be working for me.