Port checker is a network service used to check your external IP address and detect open ports on your connection. Chombo hiki ni muhimu kwa ajili ya kutafuta nje kama bandari ya usambazaji ni kuanzisha usahihi au kama server yako ya maombi ni kuwa imefungwa na firewall.
Chombo hiki pia inaweza kutumika kama bandari scanner scan mtandao wako kwa ajili ya bandari hiyo ni kawaida kupelekwa. Baadhi ya bandari, kama vile bandari 25, ni mara nyingi imefungwa katika ISP ngazi katika jaribio la kuzuia shughuli malicious. Kwa kutambua inapatikana huduma mbio juu ya server, huduma hii inatumia malighafi IP pakiti kujua nini bandari ni wazi juu ya server au nini OS (Mfumo Wa Uendeshaji) is running or to check if a server has firewall enabled etc.
The service can also detect uptime of a host, if the host is running one of the known OS which the scanner can analyze to guess uptime. To scan a host just enter the host name or the IP address in the box above and give a range of ports to scan, The recommended scan type is “connect()”, however other scan types can also be useful depending on the network of the target host, a “SYN Stealth” scan type can also prove to be useful when there’s a firewall blocking the ports. Check open ports is possible if your computer’s current external IP address.
More about this you can ask your ISP. Worth considering that if your computer is connected to the Internet, instead of directly through the router, the test results are exactly to the router. Check the port status for the computer inside a subnet is possible only with port forwarding.
Tafadhali angalia hii huduma kubwa katika: http://www.test-net.org/services/network-mask-calculator/ au tembelea HUDUMA za BURE menu