There are several entries in my router's log file showing recent DoS attempts on some of its ports. They look like this: [DoS Attack: ACK Scan] from source: 213.61.245.234, port 80, Friday, November 21,2014 11:37:59 [DoS Attack: ACK Scan] from source: 80.239.159.8, port 443, Friday, November 21,2014 11:18:09. Looking up these IP addresses in Google give the following results: • 31.13.91.117 => • 88.221.82.74 => Given the fact that Akamai is a content provider (CDN) which has been having Facebook as a customer, it seems that this might not be a real DOS attack, and that your router's protection is exaggerating. Is it possible that a lot of your employees/family members use Facebook, which causes a lot of (legitmate) Facebook responses to come in on your router? The router might see this as a DOS-attack, when it is in fact not. This is supported by the fact that the 'scans' come from source port 443, which is the TLS (HTTPS) port. You are connected via HTTPS to Facebook, and they reply to you. The other IP addresses listed in your question seem a little bit more shifty, but again, this might be a legitimate site which is sending a lot of responses (lots of CSS, JS, etc.). However, the ones that list port 30372 and 18668 are very shifty. These may be part of a massive scan or just a coincidence. I wouldn't worry about them if they don't appear regularly. One packet every 15 seconds does not constitute a DoS attack. Experience Arena of Valor, an epic new 5v5 multiplayer online battle arena (MOBA) designed by Tencent Games! Call on your teammates to join you in the. Play the award-winning hit action-strategy adventure where you meet, greet, and defeat legions of hilarious zombies from the dawn of time, to the end of days. Hack game thien long ba vuong chi. You say this is a basic Netgear router. These routers are usually advertised as having special firmware features to protect you from 'Internet threats'; what they actually have is an ordinary configured to log anomalies in the most alarming language possible. The log entries you're seeing are the result of a primitive going 'Look! I'm doing something! I'm doing something!' To try to convince you that there's a real threat it's protecting you from. 88.221.82.74 is part of Akamai's content-delivery network, while 31.13.91.117 is part of Facebook's network. TCP ACKs on port 443 are quite likely legitimate traffic (delayed ACKs of packets that have already been re-sent, or other glitches in the Internet). The other log entries are probably backscatter from DDoS attacks, large-scale automated portscans, and other background noise of the Internet. I cant add a comment at the moment or I would, but I would look into the port 49152 open. There is a known vulnerability within baseboard management controllers that allows admin passwords to be gained pretty easily. At the moment the nmap scan shows your internal network I would recommend running nmap against your external IP address provided by your internet service provider. You can get it from In regards to your actual question, looks like you might being getting hit but could also just be a mass scan that you are getting included in. Your router is dropping the connections so nothing you need to actually worry about anyway. The following are some of the tools that can be used to perform DoS attacks. • Nemesy– this tool can be used to generate random packets. It works on windows. This tool can be downloaded from. Due to the nature of the program, if you have an antivirus, it will most likely be detected as a virus. • Land and LaTierra– this tool can be used for IP spoofing and opening TCP connections • Blast– this tool can be downloaded from • Panther- this tool can be used to flood a victim’s network with UDP packets. • Botnets– these are multitudes of compromised computers on the Internet that can be used to perform a distributed denial of service attack. DoS Protection: Prevent an attack. An organization can adopt the following policy to protect itself against Denial of Service attacks. • Attacks such as SYN flooding take advantage of bugs in the operating system. ![]() Installing security patches can help reduce the chances of such attacks. • Intrusion detection systems can also be used to identify and even stop illegal activities • Firewalls can be used to stop simple DoS attacks by blocking all traffic coming from an attacker by identifying his IP. • Routers can be configured via the Access Control List to limit access to the network and drop suspected illegal traffic. Hacking Activity: Ping of Death.
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |