I can't solve some sites

Hi guys , i have a little problem . I can't solve facebook.com . I've disabled all filter but the problem persist.

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 OpenWrt 21.02.3, r16554-1d4dea6d4f
root@Router:~# nslookup facebook.com

Name:      facebook.com
Address 1:
Address 2: 2a03:2880:f108:83:face:b00c:0:25de

Any suggestion about the solution?

This appears to be correct... entering the IP address brings up facebook for me.

Can you elaborate on your issue?

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Solution for what?

The output shows quite proper resolution of facebook.com

 OpenWrt 22.03-SNAPSHOT, r19607-707ec48ab3
root@router1:~# nslookup facebook.com

Non-authoritative answer:
Name:   facebook.com

Non-authoritative answer:
Name:   facebook.com
Address: 2a03:2880:f113:81:face:b00c:0:25de

root@router1:~# ping  facebook.com
PING facebook.com (2a03:2880:f113:81:face:b00c:0:25de): 56 data bytes
64 bytes from 2a03:2880:f113:81:face:b00c:0:25de: seq=0 ttl=59 time=1.554 ms
64 bytes from 2a03:2880:f113:81:face:b00c:0:25de: seq=1 ttl=59 time=1.584 ms
--- facebook.com ping statistics ---
2 packets transmitted, 2 packets received, 0% packet loss
round-trip min/avg/max = 1.554/1.569/1.584 ms

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I can't open the site. Comparing the ip solved to me and @hnyman we are two different IP. If i use in address bar the page does'nt work. If i use the page it work. May be a dns problem?

Facebook (and every large company) has many IP addresses associated with their services, so a difference in DNS resolution does not mean that you've got something wrong there.

Have you tested the ability to reach facebook via different computers and mobile devices? You should try with a variety of device types/OS's (so Windows, Mac, Linux, iOS, Android, etc.)... this will help you determine if the issue is unique to one device/OS or if it is a problem for your entire network.

that IPv4 address opens Facebook for me.
(IPv6 is preferred, so the browser automatically takes that if that gets resolved, like in my example above)

Two notebook and two android phone same problem. If i use data connection on phones it work so seem centralized in router. I have some filters all disabled during the test but the problem persist . It's mandatory reboot the router or is enough save and apply?

What packages have you installed on your OpenWrt router? Are your client devices able to resolve the IP for facebook but not open it, or can they not resolve at all? Is the OpenWrt router serving as the DNS server for your network? Have you edited the firewall?

Found it! Custom rules not properly set in firewall.

Thank you guys!

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