Odd network issue - one laptop in the house can't access specific website on Fritzbox WiFi but can on Ethernet / Android tethered WiFi

Forums › Desktop computing › Odd network issue - one laptop in the house can't access specific website on Fritzbox WiFi but can on Ethernet / Android tethered WiFi

timmmay

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#306334 13-Jul-2023 21:19

A family member is staying with us for a few days. They bought their laptop (older Lenovo Ideapad 320, model 14-AST), which connects to our WiFi (Fritzbox 7590 / 2degrees fiber) and they can browse most websites on the web fine. Stuff.co.nz, NZHerald, Facebook, they all work no problems.

There's one NZ website they access regularly that works fine on their computer at their home but wouldn't work our WiFi, but that computer can access it using ethernet. Every other computer / phone in the house can access that website on WiFi or ethernet. Oddly that computer can access the site using WiFi when tethered to my Android phone.

Another odd thing: when plugged into ethernet the computer can ping the website by domain, but when it's on WiFi it can't ping - though the DNS resolves to the same IP. Again every other device in the house can ping on WiFi or ethernet.

Can anyone think of anything that would cause this laptop to not be able to access this one website when on WiFi, but be able to access it when on Ethernet? I've reset windows, installed drivers from the Lenovo website, updated Windows, everything I can think of, with no change.

NB: I haven't named the website because it's related to gambling - very low level and common, but still gambling.

Update: As per post below, IPv4 isn't working properly on the computer but IPv6 is. The website that isn't working is only available on IPv4.

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#3103794 13-Jul-2023 21:28

Does browser used make any difference to that behaviour?

timmmay

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#3103795 13-Jul-2023 21:39

gzt: Does browser used make any difference to that behaviour?

No, edge and chrome behave the same. Because ping and https are both not working that points me at a lower layer of the network stack... but it's a really weird problem so I could be completely wrong.

Gordy7

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#3103797 13-Jul-2023 21:45

Is the Lenova WiFi going direct to your router and not to a dead-end WiFi location?

What happens if you do a WiFi TraceRT to the non accessible website.

Gordy

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gzt

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#3103798 13-Jul-2023 21:50

timmmay: No, edge and chrome behave the same. Because ping and https are both not working that points me at a lower layer of the network stack... but it's a really weird problem so I could be completely wrong.

Fair comment and agree you're probably right. I'd still try Firefox. You're probably aware windows may have different network profiles for different network ports. Are both networks in windows using the same profile eg; 'public' etc?

sqishy

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#3103799 13-Jul-2023 21:55

From command prompt can you do an ipconfig which shows the addresses for both ethernet and wifi adapters...

muppet

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#3103800 13-Jul-2023 22:19

I would install Wireshark on the laptop and capture packets on both Wifi and Cable and compare.

I wonder if the Wifi Adaptor is setting ECN bit or a DSCP marking that the website doesn't like because it has a boneheaded Firewall. Maybe their usual router at home rewrites ECN bits (strips them) and that's why it works there.

Might also be MTU related, though I think that would manifest itself with much more obvious problems and issues.

Certainly an interesting fault!

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gzt

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#3103849 14-Jul-2023 08:58

What happens if you turn off the windows firewall for a short period?

timmmay

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#3103851 14-Jul-2023 09:03

One thing I'll point out is this behavior didn't change after I reinstalled Windows.

The network profile thing is interesting - quite possibly the problem. I went into Network and Sharing center and it the active network is "Unidentified network" which is a "Public Network". I followed instructions I found on three different websites to make it a private network, but the option to change it doesn't exist. I forgot the WiFi networks and reconnected, no different. This seems a bit odd. I wonder how I make it a private, identified network - anyone know?

Powershell get-netconnectionprofile returns (I typed this out so excuse spelling, *** from me)

Name : Unidentified network

InterfaceAlias : Wi-Fi

InterfaceIndex : 10

NetworkCategory : Public

DomainAuthenticationKind : None

IPv4Connectivity : NoTraffic ***

IPv6Connectivity : Internet

When I go to https://whatismyipaddress.com using WiFi on the laptop it tells me I have an ipv6 address but no ipv4 address... so that's a big clue. When I plug it in it tells me I have an IPv4 address. The website in question is NOT accessible over IPv6, only over IPv4, so that is probably the cause. The next question... why is IPv4 not working on WiFi?!

Next I did ipconfig /all. I've removed some of the IP suffixes, sorry if that makes it difficult. In general I can see that both WiFi and ethernet adapters are being assigned IPv4 addresses. I cannot ping anything over the network using IPv4, router or Pi Hole server, which I can do over ethernet. I can ping the Pi Hole using an IPv6 address.

Ethernet adapter Ethernet:

Connection-specific DNS Suffix . : lan
Description . . . . . . . . . . . : Realtek PCIe FE Family Controller
Physical Address. . . . . . . . . : (removed)
DHCP Enabled. . . . . . . . . . . : Yes
Autoconfiguration Enabled . . . . : Yes
IPv6 Address. . . . . . . . . . . : 2406:e001:a:a201:(removed)(Preferred)
IPv6 Address. . . . . . . . . . . : fd00::9e02:f222:(removed)(Preferred)
Temporary IPv6 Address. . . . . . : 2406:e001:a:(removed)(Preferred)
Temporary IPv6 Address. . . . . . : fd00::3c26:df5e:(Preferred)
Link-local IPv6 Address . . . . . : fe80::ce42:97eb:4744:(Preferred)
IPv4 Address. . . . . . . . . . . : 192.168.1.182(Preferred)
Subnet Mask . . . . . . . . . . . : 255.255.255.0
Lease Obtained. . . . . . . . . . : Friday, 14 July 2023 8:48:18 AM
Lease Expires . . . . . . . . . . : Friday, 14 July 2023 10:48:18 AM
Default Gateway . . . . . . . . . : fe80::2e3a:fdff:fed6:429c%5
192.168.1.1
DHCP Server . . . . . . . . . . . : 192.168.1.16
DHCPv6 IAID . . . . . . . . . . . : 55894445
DHCPv6 Client DUID. . . . . . . . : 00-01-00-01-21-68-B3-F6-54-E1-AD-8A-66-01
DNS Servers . . . . . . . . . . . : 2406:e001:a:(removed)
192.168.1.16
fd00::38cf:(removed)
2406:e001:a:(removed)
NetBIOS over Tcpip. . . . . . . . : Enabled

Wireless LAN adapter Wi-Fi:

Connection-specific DNS Suffix . : lan
Description . . . . . . . . . . . : Realtek 8821AE Wireless LAN 802.11ac PCI-E NIC
Physical Address. . . . . . . . . : (removed)
DHCP Enabled. . . . . . . . . . . : Yes
Autoconfiguration Enabled . . . . : Yes
IPv6 Address. . . . . . . . . . . : 2406:e001:a:a201:(removed)
IPv6 Address. . . . . . . . . . . : fd00::6729:2d01:(removed)
Temporary IPv6 Address. . . . . . : 2406:e001:a:a201:(removed)
Temporary IPv6 Address. . . . . . : fd00::a1d9:b1a:(removed)
Link-local IPv6 Address . . . . . : fe80::451:8449:(removed)
IPv4 Address. . . . . . . . . . . : 192.168.1.201(Preferred)
Subnet Mask . . . . . . . . . . . : 255.255.255.0
Lease Obtained. . . . . . . . . . : Friday, 14 July 2023 8:37:27 AM
Lease Expires . . . . . . . . . . : Friday, 14 July 2023 10:37:46 AM
Default Gateway . . . . . . . . . : fe80::2e3a:(removed)
fe80::a36e:(removed)
192.168.1.1
DHCP Server . . . . . . . . . . . : 192.168.1.16
DHCPv6 IAID . . . . . . . . . . . : 157291699
DHCPv6 Client DUID. . . . . . . . : 00-01-00-01-21-68-B3-F6-54-E1-AD-8A-66-01
DNS Servers . . . . . . . . . . . : 2406:e001:a:a201:(removed)
192.168.1.16
NetBIOS over Tcpip. . . . . . . . : Enabled

So the question.... what is up with the IPv4 connectivity?!

Any suggestions appreciated. I may not reply quickly as we have family staying.

Bung

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#3103852 14-Jul-2023 09:06

Why wouldn't the firewall also affect ethernet or any other wifi source that the pc can make the connection on?

timmmay

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#3103854 14-Jul-2023 09:14

Bung: Why wouldn't the firewall also affect ethernet or any other wifi source that the pc can make the connection on?

I don't think it's firewall, I think it's related to IPv4 somehow. I can't ping IPv4 on the LAN, but I can ping IPv6. The end result is websites that don't support IPv6 aren't accessible.

fearandloathing

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#3103855 14-Jul-2023 09:18

Try setting ipv4 to preferred

https://learn.microsoft.com/en-us/troubleshoot/windows-server/networking/configure-ipv6-in-windows

Recommended instead of disabling IPv6.

Prefer IPv4 over IPv6
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gzt

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#3103857 14-Jul-2023 09:19

Bung: Why wouldn't the firewall also affect ethernet or any other wifi source that the pc can make the connection on?

Windows may use a different firewall profile for each network it detects and makes a decision on. Turning off the firewall (for a period) just eliminates all that as a factor.

Gordy7

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#3103906 14-Jul-2023 10:00

Your ipconfig /all looks pretty good.

From a wired computer when you look inside your router do you see the Lenovo as a connected WiFi device?

How about an old school sledge hammer test and turn off every WiFi device except your router and Lenovo WiFi and see what happens.

Gordy

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sqishy

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#3103908 14-Jul-2023 10:18

Looks like a tricky issue, could try and find the latest device driver for that. Either from the manufacturer of the laptop or the actual wifi device. See where that goes first.

https://pcsupport.lenovo.com/nz/en/products/laptops-and-netbooks/300-series/320-14ast/downloads/driver-list/component?name=Networking%3A%20Wireless%20LAN&id=E3519D23-890E-4DE1-9064-DE6E7DA2515B

timmmay

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#3104084 14-Jul-2023 15:44

fearandloathing: Try setting ipv4 to preferred

https://learn.microsoft.com/en-us/troubleshoot/windows-server/networking/configure-ipv6-in-windows

Recommended instead of disabling IPv6.

Prefer IPv4 over IPv6
Decimal 32
Hexadecimal 0x20

Thanks for the idea. Not sure how IPv4 preferred would help given IPv4 isn't working?

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