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About imcowell

since ‎24-12-2023
‎26-12-2023
imcowell
Level 2

Re: Internet outage

by Level 2 in Broadband Internet
‎26-12-2023 05:47 PM
‎26-12-2023 05:47 PM
You might want to look at my post on DNS Denial of Service workaround. ... View more

Re: Constant drop-outs

by Level 2 in Broadband Internet
‎26-12-2023 05:38 PM
‎26-12-2023 05:38 PM
From my investigations using ping and nslookup commands, TPG is under a DNS Denial of Service attack. For example: nslookup www.abc.net.au will give a request timed out reponse. That cmd uses the default TPG DNS server 203.12.160.35 Using nslookup www.abc.net.au 203.12.160.36 gives the same timeout reponse. But if I use the dns.google public DNS server, as in nslookup www.abc.net.au 8.8.8.8 or nslookup www.abc.net.au 8.8.4.4 It gives the correct response. So I changed the primary DNS server parameter in my V220-G2v modem to 8.8.8.8 and I get a stable connection to the internet. ... View more

Re: DNS sever denial of service attacks - work around

by Level 2 in Broadband Internet
‎26-12-2023 05:22 PM
1 Like
‎26-12-2023 05:22 PM
1 Like
I found that the V220-G2v modem only uses the Primary DNS entry. That is it does not use the secondary entry if the primary fails. So to get past the DNS blockage, make the Primary DNS 8.8.8.8 or 8.8.4.4 ... View more

DNS sever denial of service attacks - work around

by Level 2 in Broadband Internet
‎24-12-2023 09:34 PM
‎24-12-2023 09:34 PM
Could I suggest that the secondary DNS sever be specified ass a non TPG server. For example 8.8.8.8 or 8.8.4.4 - that is the dns.google servers. This can be changed on the Modem 192.168.1.1 interface: For example for tp-link VX220-62v go to the Advanced tab > Network > LAN Settings and change the secondary DNS to 8.8.8.8 - then Save the change. This would have solved some issues experienced by customers during the DOS attack on the TPG DNS servers today (24 Dec 2023). Better still have as a standard Modem configuration: 3 entries for the DNS servers and nominate a non-TPG server as the 3rd entry. ... View more
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