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some DNS names were blocked

Duff11

Hi,

I am using a sophos sg115 with home license (firmware version: 9.709-3).

My problem is that I can't connect to some url's (e.g. subdomain.atlassian.net). If I use the direct connection of my Deutsche Glasfaser account on modem, it works. Also if I use my mobile LTE connection as hotspot. I can't find the issue on the utm but this is the only firewall component between my PC and DG router/modem.

Any ideas?

Webfiltering is disabled.

Country blocking is disabled.

.

Thanks in advance.

Regards,

Duff11



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  • 0

    I tried the two dns flush settings (also reboot) but without luck :( I have a so called dual ipv4/ipv6 internet access of Deutsche Glasfaser.

    WAN
WAN Status	Up,1000Mbps full duplex
MAC Address	00:0F:94:24:DE:20
IP Address	100.69.76.177
Netmask	255.255.192.0
Gateway	100.69.64.1
DNS Server 1	127.0.0.1
DNS Server 2	185.22.44.50
DNS Server 3	185.22.45.50
DNS Server 4	2a00:6020:100::1
DNS Server 5	2a00:6020:200::1
IPv6 Address	fe80::20f:94ff:fe24:de20/64
IPv6 Address	2a00:XXXX:XXXX:a35:b044:a6e2:5004:59c/128
Recursive DNS Server	2a00:6020:100::1
Recursive DNS Server	2a00:6020:200::1
Received	4.0k Packets  (824.1 KiB)
Transmitted	6.1k Packets  (1.3 MiB)

    I can't understand this behaviour. Also some domains which where accessiable for some weeks are not reachable over my sophos and DG internet access. Only via LTE hotspot of my mobile. This is very strange and stupid.

  • 0 in reply to Duff11

    If you are actually using it, try disabling IPv6 and use IPv4.  Sucks, but I've seen at least two or three issues recently posted here which IPv6 was the issue. Wouldn't hurt to rule that out. 

    I'm assuming this is a snippet from your UTM?  I ask because of your DNS server being a local host, and not a DNS server (127.0.0.1). I'd also try removing that if IPv6 isn't the issue and use either Google DNS (8.8.8.8) or Cloudflare DNS (secure DNS) - (1.1.1.1).

    *The URLs that you can't reach by their DNS name - can you reach them by their IP addresses?

    OPNSense 64-bit | Intel Xeon 4-core v3 1225 3.20Ghz
    16GB Memory | 500GB SSD HDD | ATT Fiber 1GB
    (Former Sophos UTM Veteran, Former XG Rookie)

Reply
  • 0 in reply to Duff11

    If you are actually using it, try disabling IPv6 and use IPv4.  Sucks, but I've seen at least two or three issues recently posted here which IPv6 was the issue. Wouldn't hurt to rule that out. 

    I'm assuming this is a snippet from your UTM?  I ask because of your DNS server being a local host, and not a DNS server (127.0.0.1). I'd also try removing that if IPv6 isn't the issue and use either Google DNS (8.8.8.8) or Cloudflare DNS (secure DNS) - (1.1.1.1).

    *The URLs that you can't reach by their DNS name - can you reach them by their IP addresses?

    OPNSense 64-bit | Intel Xeon 4-core v3 1225 3.20Ghz
    16GB Memory | 500GB SSD HDD | ATT Fiber 1GB
    (Former Sophos UTM Veteran, Former XG Rookie)

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