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in order for a port to be "open", it must have a process listening on it, and an accessible path by which remote systems can access it. firewalls and NAT often block packets addressed to specific ports, but they do not affect whether the port is actually open.
While Ubuntu doesn't have such a good past when it comes to security it's still way ahead of Windows. One point where Windows is more secure is the fact that it has an active by default built-in firewall which asks you about allowing access to internet for programs.
- Network Addressing
- Standard Port Numbering
- No Port Is Inherently Safe
- Port 21, File Transfer Protocol
- Port 22, Secure Shell
- Port 23, Telnet
- Port 80, Hypertext Transport Protocol
- Port 1080, Socks Proxies
- Port 4444, Transport Control Protocol
- Port 6660 - 6669, Internet Relay Chat
Network and internet Transport Control Protocol/Internet Protocol connections are made from one IP address to another. For convenience, we may use a website name like cloudsavvyit.com, but it's the underlying IP address that is used to route your connection to the appropriate webserver. The same thing works in reverse, too. The network traffic that...
Some ports are dedicated to specific types of traffic. These are called the well-known ports. Other ports are registered by applications and reserved for their use. These are the registered ports. There's a third set of ports that are available for any application to use. They are requested, allocated, used, and freed up on an ad hoc basis. These a...
Any given port is no more secure or at risk than any other port. A port is a port. It is the use the port is put to, and how securely that use is managed, that dictates whether a port is secure. The protocol that is used to communicate through a port, the service or application that consumes or generates the traffic that passes through the port nee...
An insecure FTP port hosting an FTP server is a huge security flaw. Many FTP servers have vulnerabilities that can allow anonymous authentication, lateral movement within the network, access to privilege escalation techniques, and---because many FTP servers can be controlled via scripts---a means to deploy cross-site scripting. Malware programs suc...
Secure Shell accounts (SSH) configured with short, non-unique, re-used, or predictable passwords are insecure and liable to easy compromise by password dictionary attacks. Many vulnerabilities in past implementations of SSH services and daemons have been discovered, and are still being discovered. Patching is vital to maintain security with SSH.
Telnet is a legacy service and one which should be retired. There is no justification for using this ancient and insecure means of text-based communication. All the information it sends and receives through port 23 is sent in plain text. There is no encryption at all. Threat actors can eavesdrop on any Telnet communication and can easily pick out a...
Port 80 is used for unsecured Hypertext Transport Protocol(HTTP) traffic. HTTPS has all but replaced HTTP, but some HTTP still exists out on the web. Other ports commonly used with HTTP are ports 8080, 8088, 8888. These tend to be used on older HTTP servers and web proxies. Unsecured web traffic and the associated ports are susceptible to cross-sit...
SOCKS is a protocol used by SOCKS proxies to route and forward network packets on TCP connections to IP addresses. Port 1080 was one of the ports of choice at one time, for malware such as Mydoom and many worm and denial of service attacks.
Some rootkit, backdoor, and Trojan horse software opens and uses port 4444. It uses this port to eavesdrop on traffic and communications, for its own communications, and to exfiltrate data from the compromised computer. It is also used to download new malicious payloads. Malware such as the Blaster wormand its variants used port 4444 to establish b...
Internet Relay Chat(IRC) started in 1988 in Finland, and it is still going. You'd need to have a cast-iron business case to allow IRC traffic into your organization these days. There have been countless IRC vulnerabilities discovered and exploited down through the 20-something years it has been in use. The UnrealIRCDdaemon had a flaw in its 2009 th...
- Dave Mckay
- Author
Aug 7, 2021 · Windows can be as safe as Linux if it is piloted by a good user who takes security measures into consideration. The point where Linux beats Windows the most in my opinion is that it...
May 10, 2024 · 110. SHARES. Perhaps you’re angsty that you’ve forgotten what a certain port number meant. Rest assured, you don’t have to remember all 65,535 port numbers. With so much information to remember, it’s understandable if you forget a common port. That’s why we put together this cheat sheet of common network ports for you.
- FTP: ports 20-21; SSH/SCP: port 22; HTTP: 80; HTTPS: 443; POP3: 110; POP3 over SSL: 995; IMAP: 143; IMAP over SSL: 993. We recommend you download t...
- It depends on whether you’re referring to system ports (1024) or want to include ports registered with apps (49152) because system ports range from...
- FTP: ports 20-21; SSH/SCP: port 22; Telnet: 23; SMTP: 25; DNS: 53; HTTP: 80; POP3: 110; IMAP: 143; HTTPS: 443.
- FTP: port 21; SSH/SCP: 22; Telnet: 23; SMTP: 25; DNS: 53; POP3: 110; IMAP: 145; HTTP: 80; HTTPS: 443; MySQL: 3306; RDP: 3389; VNC: 5900.
- The following are the three types of ports with corresponding port number ranges:• Well-known/System ports: 0 – 1023• Registered ports: 1024 – 4915...
Oct 11, 2024 · Some ports are more secure than others, but no port is completely safe from compromise. Here are some of the potential security risks for popular ports you use every day. Ports 80 and 443 (HTTP/HTTPS): Vulnerable to web attacks like cross-site scripting (XSS), SQL injections, and DDoS attacks.
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Apr 13, 2017 · In former and still widely used Windows versions most ports are open in default for convenience reasons, in Ubuntu they are mostly closed in default. In Ubuntu one is installing signed software using the package management, in Win or Mac one is downloading unsafely from internet.
