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Tencent Cloud: It has been detected that a large number of domestic home routers have been hijacked by DNS, and the server has now been restored
Tencent Cloud: It has been detected that a large number of domestic home routers have been hijacked by DNS, and the server has now been restored
According to news on August 9, Tencent Cloud DNSPod officially issued a document today, saying that it has detected that the DNS resolution configuration of a large number of domestic home routers has been tampered with, thus affecting normal website and app access. This situation began to occur in May 2024, and the concentrated outbreak reached its peak on August 5. As of August 7, it was confirmed through testing that the domain name that caused the large-scale outbreak of this failure has been restored on the abnormal DNS server, but it is subject to TTL Due to the impact of the client's local cache, the client's recovery time will have a certain lag. Under normal circumstances, when a user accesses a website or app, a request will be sent to the DNS server to resolve the IP address corresponding to the website domain name. The DNS server returns the correct IP address, and the user's device establishes a connection with the target server and accesses the website.
Tencent Cloud officially provides a self-check plan, which is summarized as follows:
First check whether the primary DNS configuration of your router has been modified to be similar to the following IP (including but not limited to the following IP). If it has been modified to the following IP, and The secondary DNS has been changed to 1.1.1.1, which basically confirms that your home router's DNS has been hijacked and tampered with.
- 122.9.187.125
- 8.140.21.95
- 101.37.71.80
- 47.102.126.197
- 118.31.55.110
- 47.109 .22.11
- 47.113.115.236
- 47.109.47.151
- 47.108.228.50
- 39.106. 3.116
- 47.103.220.247
- 139.196.219.223
- 121.43.166.60
- 106.15.3.137
If the DNS server IP configured on your router is not in the list above, you DNS hijacking can be confirmed by the following typical characteristics Behavior:
1. The domain name resolution record TTL is modified to 86400 seconds, that is, the domain name resolution record will be cached for 1 day. You can execute the command check on a terminal that can access the public network (such as a Mac computer or Linux cloud server): dig @122.9.187.125dnspod.cn. Where 122.9.187.125 is an example IP address, which you can replace with the IP address of your home router's DNS server.
dig @122.9.187.125 test.ip.dnspod.net
where 122.9.187.125 is an example IP address, you can replace it with the IP address of your home router DNS server.
The above is the detailed content of Tencent Cloud: It has been detected that a large number of domestic home routers have been hijacked by DNS, and the server has now been restored. For more information, please follow other related articles on the PHP Chinese website!
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