Vulnerable ports to block

1. Why port 80 is vulnerable?
2. What is port 23 vulnerabilities?
3. Is port 53 a vulnerability?
4. Is port 3389 vulnerable?
5. Should port 25 be blocked?
6. Should I block port 7?
7. Is port 1433 vulnerable?
8. Is port 443 a security risk?
9. Is port 22 unsecure?

Why port 80 is vulnerable?

Latter includes vulnerabilities in the application, i.e., when the data has already reached the application through the platform. Most common attacks exploit vulnerabilities in websites running on port 80/443 to get into the system, HTTP protocol itself or HTTP application (apache, nginx etc.) vulnerability.

What is port 23 vulnerabilities?

Multiple C-Data OLT devices are vulnerable to a denial of service, caused by a shawarma attack. By sending random bytes to the telnet server on port 23, a remote attacker could exploit this vulnerability to cause the device to reboot.

Is port 53 a vulnerability?

Vulnerabilities in DNS Bypass Firewall Rules (UDP 53) is a Low risk vulnerability that is also high frequency and high visibility. This is the most severe combination of security factors that exists and it is extremely important to find it on your network and fix it as soon as possible.

Is port 3389 vulnerable?

While RDP TCP port 3389 provides an easy way to connect remotely to corporate resources, it is notorious for many security vulnerabilities, including ransomware.

Should port 25 be blocked?

TCP port 25 is frequently blocked by Internet Service Providers (ISPs), as an anti-spam technique since it's used in MX spamming and abuse of open proxy/relay machines.

Should I block port 7?

Port 7 – Used by the Echo protocol, a way to measure the round-trip time between two hosts on the network. This is not a required or frequently used protocol, so it wise to close the port altogether. Port 7 has been the victim of several attacks in the past including the Fraggle DoS attack and the ping-pong attack.

Is port 1433 vulnerable?

Microsoft SQL Server uses the default port 1433 for all database connections. It is a common security risk in many database environments because database professionals typically do not change the default port. It is a well-known port, and intruders can utilize this opportunity to access SQL Server.

Is port 443 a security risk?

With port 443, the connection is much more secure as the information is encrypted through SSL/TLS (secure sockets layer/transport layer security). With port 80, all information is transferred in plaintext and available to anyone to see. Port 443 is the global standard port for HTTPS traffic.

Is port 22 unsecure?

As such, Port 22 is subject to countless, unauthorized login attempts by hackers who are attempting to access unsecured servers. A highly effective deterrent is to simply turn off Port 22 and run the service on a seemingly random port above 1024 (and up to 65535).