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Operation modes of telnet in cisco routers 1
- Thread starter steven890
- Start date
I'm not sure what your asking!!!!
You can telnet into your sytem from the inside and outside.
You can setup levels of security for example setting up a login local using usernames with a specific priviledge levels for access...
It's safer to use SSH to login if that is a problem....
Is this what you were looking for?
![[americanflag]](/data/assets/smilies/americanflag.gif "[americanflag] [americanflag]")
SPC NVARNG
Tek-TIP Member 19,650
You can telnet into your sytem from the inside and outside.
You can setup levels of security for example setting up a login local using usernames with a specific priviledge levels for access...
It's safer to use SSH to login if that is a problem....
Is this what you were looking for?
SPC NVARNGTek-TIP Member 19,650
- Thread starter
- #3
-
1
- #4
The commands?
router>en
router#conf t
router(config)#line vty 0 4
router(config-line)#password bla
router(config-line)#login
router(config-line)#end
router#wr
NOT SAFE!!! All usernames and passwords are sent over in clear text---someone sniffing the line can EASILY extract passwords!
router(config)#ip domain name local
router(config)#crypto key gen rsa
(pick 1024 for ssh ver1, 2048 for ssh ver 2, 1.99 according to Cisco)
router(config)#username bla priv 15 secret blabla
router(config)#enable secret blablabla
router(config)#line vty 0 4
router(config-line)#trans in ssh
router(config-line)#end
router#wr
This is for ssh. You can use Windows command line, any router that has k9 in the IOS code, or PuTTy (what I use).
The safest way, instead of ssh, is to make a remote access vpn, and that can be done if your router has k9 in the IOS image, which is needed for ssh anyway.
NOW---telnet is tcp port 23, used to remote console into devices, or to test connectivity on all 7 layers of the OSI model, particularly layer 4 (telnetting to a specific port indicates that port being open).
Like Forest Gump, that's all I have to say about that.
Burt
router>en
router#conf t
router(config)#line vty 0 4
router(config-line)#password bla
router(config-line)#login
router(config-line)#end
router#wr
NOT SAFE!!! All usernames and passwords are sent over in clear text---someone sniffing the line can EASILY extract passwords!
router(config)#ip domain name local
router(config)#crypto key gen rsa
(pick 1024 for ssh ver1, 2048 for ssh ver 2, 1.99 according to Cisco)
router(config)#username bla priv 15 secret blabla
router(config)#enable secret blablabla
router(config)#line vty 0 4
router(config-line)#trans in ssh
router(config-line)#end
router#wr
This is for ssh. You can use Windows command line, any router that has k9 in the IOS code, or PuTTy (what I use).
The safest way, instead of ssh, is to make a remote access vpn, and that can be done if your router has k9 in the IOS image, which is needed for ssh anyway.
NOW---telnet is tcp port 23, used to remote console into devices, or to test connectivity on all 7 layers of the OSI model, particularly layer 4 (telnetting to a specific port indicates that port being open).
Like Forest Gump, that's all I have to say about that.
Burt
- Thread starter
- #5
VinceWhirlwind
Technical User
connected"
and
"not connected"
???
and
"not connected"
???
Torturednacho
MIS
Telnet is another way to stay away from a broom closet. still get the same effect sitting at the console .. ..
- Status