Yadda ake Nuna Saƙon Gargaɗi ga masu amfani da SSH mara izini
Gargadin banner na SSH yana da mahimmanci lokacin da kamfanoni ko ƙungiyoyi ke son nuna tsayayyen saƙon faɗakarwa don hana masu amfani mara izini shiga sabar Linux.
Ana nuna waɗannan saƙonnin gargaɗin banner na SSH kafin faɗakar da kalmar wucewa ta SSH ta yadda masu amfani mara izini waɗanda ke shirin samun damar sanin sakamakon yin hakan. Yawanci, waɗannan gargaɗin sakamako ne na shari'a waɗanda masu amfani mara izini za su iya wahala idan sun yanke shawarar ci gaba tare da shiga sabar.
A yi hattara cewa gargadin banner ba wata hanya ba ce ta toshe masu amfani da ba da izini shiga ba. Tutar gargaɗi kawai gargaɗi ne da ake nufi don faɗakar da masu amfani mara izini shiga. Idan kuna son toshe masu amfani mara izini shiga, to ƙarin SSH ana buƙatar daidaitawa.
Tutar SSH ta ƙunshi wasu bayanan gargaɗin tsaro ko bayanan gaba ɗaya. Masu biyowa wasu misalin saƙon banner na SSH waɗanda nake amfani da su akan sabar Linux dina.
Misali Saƙon Banner SSH 1:
################################################################# # _ _ _ _ # # / \ | | ___ _ __| |_| | # # / _ \ | |/ _ \ '__| __| | # # / ___ \| | __/ | | |_|_| # # /_/ \_\_|\___|_| \__(_) # # # # You are entering into a secured area! Your IP, Login Time, # # Username has been noted and has been sent to the server # # administrator! # # This service is restricted to authorized users only. All # # activities on this system are logged. # # Unauthorized access will be fully investigated and reported # # to the appropriate law enforcement agencies. # #################################################################
Misali Saƙon Banner SSH 2:
ALERT! You are entering a secured area! Your IP, Login Time, and Username have been noted and have been sent to the server administrator! This service is restricted to authorized users only. All activities on this system are logged. Unauthorized access will be fully investigated and reported to the appropriate law enforcement agencies.
Akwai hanyoyi guda biyu don nuna saƙonni ɗaya yana amfani da fayil na issue.net kuma na biyu yana amfani da fayil MOTD.
- /etc/issue.net - Nuna saƙon banner na gargaɗi kafin shigar da kalmar wucewa.
- /etc/motd – Nuna saƙon banner maraba bayan mai amfani ya shiga.
Don haka, na ba da shawarar duk masu gudanar da tsarin su nuna saƙon banner kafin barin masu amfani su shiga cikin tsarin. Kawai bi ƙasa masu sauƙi matakai don kunna saƙonnin shiga SSH.
Nuna Saƙon Gargaɗi na SSH ga Masu amfani Kafin Shiga
Don nuna saƙonnin gargaɗin SSH ga duk masu amfani mara izini, kuna buƙatar samun dama ga fayil /etc/issue.net don nuna saƙon banner ta amfani da editan rubutu da kuka fi so.
$ sudo vi /etc/issue.net Or $ sudo nano /etc/issue.net
Ƙara saƙon samfurin banner mai biyowa kuma ajiye fayil ɗin. Kuna iya ƙara kowane saƙon tuta na al'ada zuwa wannan fayil ɗin.
################################################################# # _ _ _ _ # # / \ | | ___ _ __| |_| | # # / _ \ | |/ _ \ '__| __| | # # / ___ \| | __/ | | |_|_| # # /_/ \_\_|\___|_| \__(_) # # # # You are entering into a secured area! Your IP, Login Time, # # Username has been noted and has been sent to the server # # administrator! # # This service is restricted to authorized users only. All # # activities on this system are logged. # # Unauthorized access will be fully investigated and reported # # to the appropriate law enforcement agencies. # #################################################################
Na gaba, buɗe fayil ɗin sanyi /etc/ssh/sshd_config.
$ sudo vi /etc/ssh/sshd_config Or $ sudo nano /etc/ssh/sshd_config
Nemo kalmar Banner kuma ba da amsa ga layin kuma ajiye fayil ɗin.
#Banner /some/path
Kamata ya yi kamar haka.
Banner /etc/issue.net (you can use any path you want)
Na gaba, sake kunna SSH daemon don nuna sabbin canje-canje.
$ sudo systemctl restart sshd Or $ sudo service restart sshd
Yanzu gwada haɗi zuwa uwar garken za ku ga saƙon banner mai kama da ƙasa.
Nuna Saƙon Maraba na SSH ga Masu amfani Bayan Shiga
Don nuna SSH barka da saƙon banner bayan shiga, muna amfani da /etc/motd fayil, wanda ake amfani da shi don nuna saƙon banner bayan shiga.
$ sudo vi /etc/motd Or $ sudo nano /etc/motd
Sanya saƙon samfurin maraba mai zuwa kuma ajiye fayil ɗin.
############################################################### # TECMINT.COM # ############################################################### # Welcome to TecMint.com! # # All connections are monitored and recorded. # # Disconnect IMMEDIATELY if you are not an authorized user! # ###############################################################
Yanzu kuma gwada shiga cikin uwar garken za ku sami saƙonnin banner biyu. Duba hoton da aka makala a ƙasa.
Kuma shi ke nan. Muna fatan za ku iya ƙara saƙon banner na SSH na al'ada akan sabar ku don gargaɗi masu amfani mara izini daga shiga tsarin.