Qormadan waxaan ku sharixi doonaa waxa ay kala yihiin Dekadaha xiran iyo Dekadaha Qarsoon^{(Stealth Ports)} iyo waxa ay ku kala duwan yihiin Deked xiran iyo Deked qarsoodi^{(Stealth Port)} ah oo kooban. Firewalls , shaki la'aan, waa mid ka mid ah qaybaha ugu muhiimsan kombuyuutarkaaga (shabakadda) waxayna kaa caawinayaan ilaalinta dekedaha. Waad ogtahay inaad u baahan tahay firewall si kumbuyuutarkaagu (shabadhka) uusan uga muuqan internetka^(Internet) kuwa xunxun. Kuwani waa niman xun oo hela dekedaha kombuyuutarka oo kombuyuutarkaaga ka gala mid ka mid ah. Xeeladdoodu way sii socotaa isbeddelka, markaa, shirkadaha naqshadeeya dab-damiska waxay ku daraan ammaan aad iyo aad u badan dab-damiskooda - firmware ama software.

Deked xiran vs Stealth Port

Muddo dheer, waxaan rumaysnaa dhamaanteen IT'ians waxaan aaminsanahay in dekedaha lagu hayo qaab qarsoodi ah. Si kastaba ha ahaatee, isticmaale ayaa ka jawaabay dib u eegistayda Comodo^(Comodo) firewall isagoo leh ISP-giisa^(ISP) ( Adeegga Internetka ee la Bixiyay^{(Internet Service Provided)} ) ayaa u habeeyey shabakada qaab muujinaya dekedaha sida "xiran" oo ka soo horjeeda "xatooyo" doorbidaya. Ma garanayo sida ay taasi uga dhigayso kombayutarka ama shabakadda kombuyuutarka ee ka dambeeya firewall-kaas mid nabdoon. Fikradayda, dekedaha xiran ayaa weli ah kuwo nugul maadaama kuwa xun ay mar walba ogaan karaan sida loo furo iyaga oo isticmaalaya farsamooyin isku dhafan. Kaliya dhageyso taraafikada, u gal kumbuyuutarka adoo isticmaalaya dekada furan ka dibna fur dekedaha xiran.

Haddii ay dhacdo inaadan kala garanaynin farqiga u dhexeeya qaabka dekedda xiran^{(closed port mode)} iyo qaabka dekedda qarsoodiga ah^{(stealth port mode)} , halkan waa sharraxaad fudud.

Kumbuyuutarku waxa uu leeyahay dekedo badan oo uu kula xidhiidho qaybo kala duwan oo ay ku xidhan yihiin sida Printers, Scanners, Keyboards, router-ka iwm. Dekedaha ku xidhan madbacadaha iyo meelaha kale ee ku xidhani waa iska caadi mar haddii aanay samaynayn “waxyaabaha Internetka^(Internet) . "- oo la macno ah kuma xirna internetka^(Internet) . Laakiin haddii mid ka mid ah kombuyuutarradaas ama meelaha ku xeeran ay ku xiran yihiin internetka^(Internet) , waa inaan hubinno in qofna uusan geli karin iyaga oo aan fasax sax ah loo haysan. Taasi waxay soo koobaysaa wax walba oo dhan "wax walba waxay ku xiran yihiin internetka^(Internet) iyada oo loo marayo hal ama dhowr deked".

Tusaale ahaan, lambarka dekedda 995 waxa loo isticmaalaa in lagu helo iimaylo sugan. Dekadda^(Port) #110 waxa kale oo loo isticmaalaa in lagu helo boostada iyada oo loo marayo xidhiidhka aan qarsoodi ahayn ee internetka^(Internet) . Sidoo kale^(Likewise) , lambarka dekedda 80 waxaa loo isticmaalaa in lagu xiro internetka^(Internet) inta badan kombiyuutarada ku salaysan Windows.

Waxa ay tuugtu sameeyaan waa in ay isku dayaan oo ay helaan xaalad kasta oo dekedo ah - furan ama xiran si ay u helaan kombiyuutar kasta (shabakad) ama server. Haddii dekeddu furan tahay, waxay isla markiiba geli karaan kombiyuutarka (shabadhka). Haddii dekeddu ay xiran tahay, waxay weli isticmaali karaan farsamooyin isku dhafan si ay u galaan kombiyuutarka (shabakadda). Si kastaba ha noqotee, haddii dekeddu ay ku jirto qaab qarsoodi ah, waa mid aan laga arki karin kuwa kale internetka^(Internet) . Kiis qarsoodi ah ayaa ka dhigaya kombuyuutarkaaga (shabadhka) inuu ka waayo internetka^(Internet) .

Fikradayda, dab-damisyada ka hortagaya dekedaha shabakadaha kombuyuutarkaaga inay ka soo muuqdaan internetka^(Internet) ayaa ah kuwa ugu fiican. Markaa, waa inaad aadaa dab-damisyo bixiya hab qarsoodi ah dekedaha halkii la xidhi lahaa. Ma garanayo sababta qaar ka mid ah ISP^(ISPs) -yada ay u isticmaalayaan habab xiran sida la ii sheegay hab ka faallooda dib u eegistayda Comodo^(Comodo) firewall. Haddii midkiin jawaab u hayo, fadlan ila wadaag.

Software Firewalls

Fadlan^(Please) ogow in liiskan dab-damiska bilaashka ah laga yaabo inaysan qummanayn. Waxaan doortay in yar oo ka badan darsin firewalls waxaanan sameeyay dhawr tijaabo oo laga heli karo internetka^(Internet) . Waxay ahaayeen imtixaanno aasaasi ah oo si fudud u heli karo qof kasta oo dhammaan ku gudbay. Kuwani waa software-ka ugu fiican ee Firewall-ka ee loogu talagalay Windows 10^{(best Free Firewall software for Windows 10)} sida ku cad kormeerkaygu. Eeg iyaga oo haddii aad dareento inaan u xiisay ama aan ku daray shay aan halkan joogin, fadlan ii soo sheeg - sababo la xiriira.

Hardware Firewalls

Sida had iyo jeer, dab-damiska firmware-yada ayaa korka yaal waxayna joogaan meesha ugu horeysa ee xiriirka internetka^(Internet) . Dab^(Hardware) -damiska hardware waa kuwa lagu daray routerkaaga iyo modem-yada kaa caawinaya inaad ka dhex muuqan internetka^(Internet) . Halka qaabka caadiga ah ee ay bixiyaan uu yahay qaab qarsoodi ah, waxaad isticmaali kartaa mid ka mid ah imtixaanada hoos ku xusan si aad u aragto natiijooyinka. Haddii aad rabto inaad tijaabiso qalabka dabka, fadlan dami dab-damis kasta oo kale (oo uu ku jiro Windows firewall) ka hor intaadan samaynin imtixaannada. Waxaad wax badan ka akhriyi kartaa halkan on Hardware firewall vs. Software firewall .

In kasta oo aan si buuxda ugu qanacsanahay in kuwani yihiin qaabka ugu wanaagsan ee ilaalinta maadaama aad awood u yeelan karto in dab-demisku shido ka dibna aad isticmaasho firewall software si aad ugu darto lakab kale, hadda waxaan kugu boorinayaa inaad tijaabiso firewall-ka hardware kaliya haddii ISP- gaagu uu sidoo kale u habeeyo u muuqdaan kuwo xiran halkii ay ka ahaan lahaayeen qaab qarsoodi ah.

Waa maxay ra'yigaaga? ^{(What is your opinion?)}Firewall kee baad isticmaasha, keebaadse u malaynaysaa inuu yahay kan ugu fiican? Haddii aad u malaynayso in aan wax seegay ama aan ku daray shay aan halkan joogin, fadlan i soo ogeysii.

Tixraac: ^{(Reference: )} GRC, Tijaabada Gaashaaman: Gibson Research Corp

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Closed Port vs Stealth Port - Difference discussed

In this post, we will explain what are Closed Ports and Ѕtealth Ports and the differences between a Closed Port and a Stealth Port in brief. Firewalls, no doubt, are one of the most important components of your computer (network) and they help уoυ protect Pоrts. You know yоu need a firewаll so that your computer (network) is not visible on the Internet to the bad guys. These аre bad guys who find compυter ports and access your computer through one of them. Their tactics keep on changing and hence, the firewall designing companies add more and more security to their firewalls – firmware or software.

Closed Port vs Stealth Port

For long, I’ve believed all of us IT’ians believe in keeping the ports in stealth mode. However, a user responded to my review of the Comodo firewall saying his ISP (Internet Service Provided) has programmed the network in a way that shows ports as “closed” as against the preferred “stealth”. I do not know how that makes the computer or the computer network behind that firewall any safer. In my opinion, closed ports are still vulnerable as the bad guys can always figure out how to open them using a combination of techniques. Just listen to traffic, get to the computer using the open port and then open the closed ports.

In case you do not know the difference between closed port mode and stealth port mode, here is a simple description.

A computer has many ports through which it communicates with different components attached to it such as printers, scanners, keyboards, and routers, etc. The ports connected to printers and other peripherals are okay as long as they do not form “things of the Internet” – meaning they are not connected to the Internet. But if any of those computers or the peripherals are connected to the Internet, we have to make sure no one can access them without proper permission. That sums up the entire thing to “everything connects to the Internet through one or more port”.

For example, port number 995 is used to receive secure email. Port #110 is also used to receive mail via an unencrypted connection to the Internet. Likewise, port number 80 is used to connect to the Internet in most Windows-based computers.

What hackers do is to try and find any instances of ports – open or closed so that they can gain access to any computer (network) or server. If the port is open, they can straightaway get into the computer (network). If the port is closed, they can still use a combination of techniques to get into the computer (network). However, if the port is in stealth mode, it is invisible to others on the Internet. A stealth case makes your computer (network) disappear from the Internet.

In my opinion, the firewalls that prevent ports of your computer networks from appearing on the Internet are the best. Thus, you should go for firewalls that provide stealth mode for ports rather than closed. I do not know why some of the ISPs are using closed modes as told to me by way of comment on my review of the Comodo firewall. If any of you have an answer, please share it with me.

Software Firewalls

Please note that this list of free firewalls may not be perfect. I selected a little over a dozen firewalls and ran few tests available on the Internet. They were basic tests that are easily available to anyone and all passed them. These are the best Free Firewall software for Windows 10 as per my observation. Check them out and if you feel I missed or included something that shouldn’t be here, please inform me  – with reasons.

Hardware Firewalls

As always, the firmware firewalls are on top and are present at the very first point of contact with the Internet. Hardware firewalls are ones included in your routers and modems that help you stay invisible on the Internet. While the default mode they provide is a stealth mode, you can use one of the tests mentioned below to see the results. In case you wish to test the hardware firewall, please disable any other firewall (including the Windows firewall) before running the tests. You can read more here on Hardware firewall vs. Software firewall.

While I was totally convinced that these are the best form of protection as you can have these firewall turned on and then use a software firewall to add another layer, I now urge you to test the hardware firewall just in case your ISP too configured them to appear as closed instead of stealth mode.

What is your opinion? Which firewall do you use and which do you think is the best one? If you think I missed something or included something that shouldn’t be here, please let me know me.

Reference: GRC, Shields Up Tests: Gibson Research Corp

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