ssh კონფიგურაცია Cisco-ზე

ssh კონფიგურაცია cisco-ს როუტერზე

ssh გამოიყენება დაშიფრული კავშირისათვის. ამ დროს გადაცემული ინფორმაცია უცნობი რჩება მესამე პირისთვის, რომელიც შეიძლება უყურებდეს ტრაფიკს, განსხვავებიტ telnet-ისაგან როდესაც ინფორმაცია გადაიცემა ღია ტექსტის სახით.
იმისათვის რომ დავაკონფიგუროთ ssh cisco-ს როუტერზე, საჭიროა როუტერს გააჩნდეს უნიკალური სახელი, hostname.
ამის შემდეგ მივანიჭოთ დომენური სახელი
დომენური სახელის მისანიჭებლად გლობალური კონფიგურაციის რეჟიმში ვკრეფთ:
ip domain-name <დომენური სახელი>
მაგალითად: R1(config)#ip domain-name windowson.ge
იმისათვის რომ როუტერმა დაშიფროს ტრაფიკი საჭიროა გასაღებების გენერირება. ამისათვის ვკრეფთ:
crypto key generate rsa general-keys modulus <მოდულის ზომა>
მაგალითად:

R1(config)#crypto key generate rsa general-keys modulus 1024
The name for the keys will be: R1.windowson.ge

% The key modulus size is 1024 bits
% Generating 1024 bit RSA keys, keys will be non-exportable…[OK]

მოდულის ზომა განსაზღვრავს RSA გასაღების ზომას და შეიძლება იყოს 360 ბიტიდან 2048 ბიტამდე. რაც უფრო დიდია RSA გასაღების ზომა, უფრო მეტას დაცულია, თუმცა გასაღების გენერეირებასა და დაშიფვრა-გაშიფვრას მეტი დრო სჭირდება. მინიმალური რეკომენდირებული RSA გასაღების ზომა 1024 ბიტია. RSA გასაღების გენერაციის შემდეგ ssh ავტომატურად ირთვება როუტერზე.
ssh-ის მუშაობისათვის საჭიროა როუტერზე დაყენებული იყოს მომხმარებლის სახელი username და დაშიფრული პაროლი secret.
R1(config)#username cisco secret 123
secret-ის ნაცლად არ არის რეკომენდირებული password ბრძანების გამოყენება, რადგანაც ამ დროს არ ხდება პაროლის md5 კოდირებაში დაშიფვრა.
დავაკონფიგუროთ ssh vty ხაზებზე.
R1(config)# line vty 0 15
R1(config-line)#login local
R1(config-line)#transport input ssh

გენერირებული გასაღებების ნახვა შესალებელია პრივილიგირებულ EXEC რეჟიმში შემდეგი ბრძანებით
show crypto key mypubkey rsa

R1#show crypto key mypubkey rsa
% Key pair was generated at: 22:16:35 UTC Oct 15 2016
Key name: R1.windowson.ge
Usage: General Purpose Key
Key is not exportable.
Key Data:
30819F30 0D06092A 864886F7 0D010101 05000381 8D003081 89028181 00DCA216
F2109DC8 1DCBEB72 6FBABE81 C123B4AB F6784CE7 1486D2DB 54634359 21621787
B88DFA86 BFCA0BC7 4F987B23 A2337970 A3978863 CAB00CD0 1AD313B1 7EF9EC0B
A977BC21 1C950A71 7E971C45 FBDF2380 EA22A093 37BE89DC 8D2547B1 249D7FE8
E0BC0EC6 DFB2D092 CF055181 268437F3 25F14D1A 0F7C96FD 33A19788 D5020301 0001
% Key pair was generated at: 22:16:35 UTC Oct 15 2016
Key name: R1.windowson.ge.server
Usage: Encryption Key
Key is not exportable.
Key Data:
307C300D 06092A86 4886F70D 01010105 00036B00 30680261 00C48852 FD264C6E
E00F1324 2D794343 38F89078 FAA81C5E 85191747 5BF10424 00B9027E 04C0ABF5
B1237223 C4DB0F9E B169FCFB BCD678F2 BC5B86CC DD5E9AB0 DEF369F4 5AFB195C
91D60A55 0EE86766 AA4F825B 1A98B80B C21C80CF 7FB7D0DE F7020301 0001

გასაღებების წაშლა:

R1(config)#crypto key zeroize rsa
% All RSA keys will be removed.
% All router certs issued using these keys will also be removed.
Do you really want to remove these keys? [yes/no]: y
R1(config)#
*Oct 15 22:20:02.627: %SSH-5-DISABLED: SSH 1.5 has been disabled

დამატებითი ბრძანებები:

ip ssh version
ssh ვერისიის დაყენება.
ip ssh timeout period
სესიის ტაიმაუტი წამებში 1-120

ip ssh authentication-retries 3
ავტორიზიზაციის მცდოლებების რაოდენობა რომლის შემდეგაც ხდება კავშირირის გაწყვეტა, ნაგულისხმევად დაყენებულია 3.

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  19. Hi again

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  24. Good Afternoon!

    I have recently attended a wedding and after 4 painful weeks of wedding gift shopping, I have decided to put together a guide to buying wedding gifts to save others the agony!

    I would like to contribute my article to your blog as I am sure that most of your readers would not only enjoy it reading but find it quite useful as everyone is bound to attend a wedding at some point!

    I have saved the article inside my google drive:

    https://drive.google.com/drive/folders/1TboW30WeuykaIfggl6Dv8H71HjF1uGmP?usp=sharing

    I am very sorry but I did not have the time to find many images so I would be grateful if you could add some of your own. I did get permission from a UK lingerie company to use some of their banners. Those are included in my Google drive as well.

    It would be fab if you could ping me the url of the published post as I would like to show off a little in front of my Facebook friends!

    Regards
    Tony

  25. Hello there,

    My name is Aly and I would like to know if you would have any interest to have your website here at windowson.ge promoted as a resource on our blog alychidesign.com ?

    We are updating our broken link resources to include current and up to date resources for our readers.
    .
    If you may be interested in being included as a resource on our blog, please let me know.

    Thanks,
    Aly

  26. Hello there, My name is Aly and I would like to know if you would have any interest to have your website here at windowson.ge promoted as a resource on our blog alychidesign.com ?

    We are updating our do-follow broken link resources to include current and up to date resources for our readers. If you may be interested in being included as a resource on our blog, please let me know.

    Thanks, Aly

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