I read somewhere - Port scan detected and blocked, what does it mean?

Asked by Andrea Bailey Mar 22, 2022 887 views 1 answer

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I have Bitdefender Total Security 2014.

Recently I have been getting the message/alert "Port scan detected and blocked". I did not care about it much until I got more, especially at a specific time. I was shocked when I saw the External IP of the attacker is from the same country where I am; so it's not a robot or virus, it's a hacker and I am his target. Can the hacker break my security and access my computer if he found an opened port?

How to block port scanning by hackers? I have heard of NMap but I am not a network specialist.

If my anti-virus and firewall are not the best, what do you recommend for me? All the internet is saying Bitdefender is one of the best (if not the best!). But I have asked a specialist and he said "COMODO".

What configurations should I set on my router to help regarding this problem? Should I allow the following settings or not?

IGMP Snooping

QoS

I have disabled UPnP
Wifi password encrypted "WPA2-PSK"
I have enabled: ICMP Flooding, SYN Flooding and ARP Attack but I think my internet connection is getting slower!
http://prntscr.com/5fabgc

Best Answer · By JanBask Cyber Security Expert

Andrea Bailey

Answered on Mar 22, 2022

I was wondering whether Windows Updates could be the reason for you receiving the message - port scan detected. We have people working in shared locations and I see these:

Firewall Blocked Scan Port Source IP: FE80:0000:0000:0000:F812:4A2D:648A:0E45
Firewall Blocked Scan Port Source IP: 172.16.101.168
Firewall Blocked Scan Port Source IP: 172.16.100.173
Firewall Blocked Scan Port Source IP: 172.16.100.190

Looking at the WUDO post, it could be that the Win10 update is configured to try to reduce the bandwidth on a few machines. There is sadly enough not enough information in the BITDEFENDER report to easily flag the alert as a false positive.

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I read somewhere - Port scan detected and blocked, what does it mean?

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