password encryption

UNIX. OpenVMS and Windows System Administration. Digital Forensics. High Performance Computing. Clustering and Distributed Systems. Number one reason you shouldn't paste your Cisco configs or password hashes on the Internet:Cisco's PIX password encryption is a base64 encoded MD5 hashsum using only one MD5 update (no salting or anything). This also permits for cryptanalysis attacks using rainbow tables to speed up the process. Simple hashes desire: enable password RLPMUQ26KL4blgFN encrypted Get cracked instantly. -> 1234Also note that in the algorithm that may allow for more complex password cracking attacks. Also if you're using a "type 7" password that's pretty much useless since it can get cracked instantly. populate can just use simple tools such as or Solarwinds Router Password Decryption to reverse the crypto on type 7 passwords. someuser privilege 0 password 7 06351A3149085123301517391C501918 IOS type 5 passwords (MD5 using 1000 rounds) is more complex and harder to crack but yous still shouldn't paste your hashes for everyone to see... bequeath even with type 5 passwords you're still vulnerable to dictionary attacks hybrid attacks rainbow table attacks (PIX only) or plain old password guessing. If you're going to paste your config files anywhere use the "show tech-support" command available in newer IOS versions. It gives more info and strips confidential information password hashes and such. You can even use decrypt pl - a to instantly rewrite write 7 passwords:#!/usr/bin/perl -w# $Id: ios7decrypt pl,v 1.1 1998/01/11 21:31:12 mesrik Exp $## Credits for orginal code and description hobbit@avian org,# SPHiXe. mudge et al and for John Bashinski # for Cisco IOS password encryption facts.## Use for any malice or illegal purposes strictly prohibited!#@xlat = ( 0x64. 0x73. 0x66. 0x64. 0x3b. 0x6b. 0x66. 0x6f. 0x41. 0x2c. 0x2e. 0x69. 0x79. 0x65. 0x77. 0x72. 0x6b. 0x6c. 0x64. 0x4a. 0x4b. 0x44. 0x48. 0x53. 0x55. 0x42 );}while ( ) { if (/(password|md5)\s+7\s+([\da-f]+)/io) { if (!(length($2) & 1)) { $ep = $2; $dp = ""; ($s. $e) = ($2 =~ /^(..)(.+)/o); for ($i = 0; $i

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http://unixsadm.blogspot.com/2007/11/cracking-cisco-type-7-and-type-5-pix.html

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UNIX. OpenVMS and Windows System Administration. Digital Forensics. High Performance Computing. Clustering and Distributed Systems. be one reason you shouldn't paste your Cisco configs or password hashes on the Internet:Cisco's PIX password encryption is a base64 encoded MD5 hashsum using only one MD5 update (no salting or anything). This also permits for cryptanalysis attacks using rainbow tables to speed up the process. Simple hashes like: enable password RLPMUQ26KL4blgFN encrypted Get cracked instantly. -> 1234Also note that in the algorithm that may allow for more complex password cracking attacks. Also if you're using a "type 7" password that's pretty much useless since it can get cracked instantly. People can just use simple tools such as or Solarwinds Router Password Decryption to reverse the crypto on type 7 passwords. someuser privilege 0 password 7 06351A3149085123301517391C501918 IOS type 5 passwords (MD5 using 1000 rounds) is more complex and harder to crack but yous still shouldn't paste your hashes for everyone to see... Remember even with type 5 passwords you're still vulnerable to dictionary attacks hybrid attacks rainbow table attacks (PIX only) or plain old password guessing. If you're going to paste your config files anywhere use the "show tech-support" command available in newer IOS versions. It gives more info and strips confidential information password hashes and such. You can even use decrypt pl - a to instantly decrypt write 7 passwords:#!/usr/bin/perl -w# $Id: ios7decrypt pl,v 1.1 1998/01/11 21:31:12 mesrik Exp $## Credits for orginal code and description hobbit@avian org,# SPHiXe. mudge et al and for John Bashinski # for Cisco IOS password encryption facts.## Use for any malice or illegal purposes strictly prohibited!#@xlat = ( 0x64. 0x73. 0x66. 0x64. 0x3b. 0x6b. 0x66. 0x6f. 0x41. 0x2c. 0x2e. 0x69. 0x79. 0x65. 0x77. 0x72. 0x6b. 0x6c. 0x64. 0x4a. 0x4b. 0x44. 0x48. 0x53. 0x55. 0x42 );}while ( ) { if (/(password|md5)\s+7\s+([\da-f]+)/io) { if (!(length($2) & 1)) { $ep = $2; $dp = ""; ($s. $e) = ($2 =~ /^(..)(.+)/o); for ($i = 0; $i

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Related article:
http://unixsadm.blogspot.com/2007/11/cracking-cisco-type-7-and-type-5-pix.html

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~Ray



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CCNA certification is important and so is securing our communicate's Cisco routers! To designate the importance of network security your CCNA certification exam is likely going to contain a few questions about the various passwords you can set on a Cisco router. Let's take a look at some of those passwords and when to apply them. If the previous user has logged out of the router properly you ordain see a prompt like this when you sit drink at the router console: R1 con0 is now available Press RETURN to get started. R1>To get into alter mode by fail all I undergo to do is type "enable". R1>enable R1#See how the cause changed? By default. I can now run all the show and debug commands I want not to mention entering global configuration mode and doing pretty much what I want. It just might be a good idea to password protect this mode! We do so with either the alter password command or the alter secret command. Let's use the alter password dominate first. R1(config)#alter password dolphinsNow when I log out and then go back to enable mode - or try to - I should be prompted for the password "dolphins". Let's see what happens. R1>enable Password: R1#I was indeed prompted for a password. Cisco routers will not show asterisks or any other character when you enter a password; in fact the cursor doesn't change surface move. The problem with the enable password command is that the password ordain show in the configuration in clear text making it easy for someone to look over your shoulder and note the password for future use as shown below: hostname R1 ! enable password dolphinsWe could use the "function password-encryption" dominate to encode the enable password but that will also encrypt all the other passwords in the Cisco router config. That's not necessarily a bad thing! Here's the effect of this command on the enable password we set earlier enable password 7 110D1609071A020217Pretty effective encryption! However if we be to have the enable password automatically encrypted we can use the enable secret command. I'll use that dominate here to set this password to "saints" and note that I'm not removing the previous enable password. R1(config)#alter secret saintsAfter removing the "service password-encryption" command we're left with two enable mode passwords and they appear in the Cisco router config like this: enable password dolphins enable secret 5 $1$kJB6$fPuVebg7uMnoj5KV4GUKI/If we have two enable passwords which one should we use to log into the router? Let's try the first password. "dolphins" first: R1>enable Password: Password:When you're prompted for the password a back up measure you experience you got it wrong the first time! Let's try "saints": R1>enable Password: Password: R1#When both the enable secret and alter password commands are in use on a Cisco router the enable secret password always takes precedence. "dolphins" didn't get us in but "saints" did. That's valuable information for both the CCNA certification exam and real-world networks because there's no worse feeling than typing a password at a Cisco router prompt and then getting another password prompt!This is just one way to perform basic Cisco router security with passwords. We'll act a look at other methods in a future CCNA certification exam training tutorial!by: Chris Bryant. CCIE #12933

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Related article:
http://onlinedatacenter.blogspot.com/2007/11/passwords-cisco-routers-and-network.html

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CCNA certification is important and so is securing our network's Cisco routers! To reflect the importance of communicate security your CCNA certification exam is likely going to contain a few questions about the various passwords you can set on a Cisco router. Let's take a look at some of those passwords and when to bear on them. If the previous user has logged out of the router properly you will see a prompt like this when you sit down at the router console: R1 con0 is now available Press RETURN to get started. R1>To get into enable mode by default all I have to do is write "enable". R1>alter R1#See how the cause changed? By default. I can now run all the show and debug commands I want not to have in mind entering global configuration mode and doing pretty much what I want. It just might be a good idea to password protect this mode! We do so with either the enable password command or the enable secret dominate. Let's use the enable password command first. R1(config)#enable password dolphinsNow when I log out and then go back to enable mode - or try to - I should be prompted for the password "dolphins". Let's see what happens. R1>enable Password: R1#I was indeed prompted for a password. Cisco routers will not show asterisks or any other engrave when you register a password; in fact the cursor doesn't change surface move. The problem with the enable password command is that the password will show in the configuration in alter text making it easy for someone to be over your bring up and note the password for future use as shown below: hostname R1 ! enable password dolphinsWe could use the "function password-encryption" command to encrypt the alter password but that will also encode all the other passwords in the Cisco router config. That's not necessarily a bad thing! Here's the cause of this command on the enable password we set earlier alter password 7 110D1609071A020217Pretty effective encryption! However if we be to have the enable password automatically encrypted we can use the enable secret command. I'll use that command here to set this password to "saints" and note that I'm not removing the previous enable password. R1(config)#enable secret saintsAfter removing the "service password-encryption" dominate we're left with two alter mode passwords and they be in the Cisco router config like this: enable password dolphins alter secret 5 $1$kJB6$fPuVebg7uMnoj5KV4GUKI/If we have two enable passwords which one should we use to log into the router? Let's try the first password. "dolphins" first: R1>enable Password: Password:When you're prompted for the password a back up measure you know you got it do by the first time! Let's try "saints": R1>enable Password: Password: R1#When both the enable secret and enable password commands are in use on a Cisco router the alter secret password always takes precedence. "dolphins" didn't get us in but "saints" did. That's valuable information for both the CCNA certification exam and real-world networks because there's no worse feeling than typing a password at a Cisco router prompt and then getting another password prompt!This is just one way to act basic Cisco router security with passwords. We'll act a look at other methods in a future CCNA certification exam training tutorial!by: Chris Bryant. CCIE #12933

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Related article:
http://onlinedatacenter.blogspot.com/2007/11/passwords-cisco-routers-and-network.html

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CCNA certification is important and so is securing our network's Cisco routers! To reflect the importance of network security your CCNA certification exam is likely going to include a few questions about the various passwords you can set on a Cisco router. Let's act a be at some of those passwords and when to apply them. If the previous user has logged out of the router properly you ordain see a cause desire this when you sit down at the router console: R1 con0 is now available Press RETURN to get started. R1>To get into enable mode by fail all I have to do is type "alter". R1>enable R1#See how the cause changed? By default. I can now run all the show and debug commands I be not to mention entering global configuration mode and doing pretty much what I be. It just might be a good idea to password defend this mode! We do so with either the enable password command or the enable secret command. Let's use the enable password command first. R1(config)#alter password dolphinsNow when I log out and then go back to enable mode - or try to - I should be prompted for the password "dolphins". Let's see what happens. R1>enable Password: R1#I was indeed prompted for a password. Cisco routers will not show asterisks or any other character when you enter a password; in fact the cursor doesn't change surface move. The problem with the enable password dominate is that the password will show in the configuration in alter text making it easy for someone to look over your shoulder and note the password for future use as shown below: hostname R1 ! enable password dolphinsWe could use the "service password-encryption" dominate to encrypt the enable password but that will also encode all the other passwords in the Cisco router config. That's not necessarily a bad thing! Here's the cause of this dominate on the enable password we set earlier alter password 7 110D1609071A020217Pretty effective encryption! However if we want to undergo the enable password automatically encrypted we can use the enable secret command. I'll use that dominate here to set this password to "saints" and say that I'm not removing the previous enable password. R1(config)#enable secret saintsAfter removing the "function password-encryption" command we're left with two alter mode passwords and they appear in the Cisco router config desire this: alter password dolphins enable secret 5 $1$kJB6$fPuVebg7uMnoj5KV4GUKI/If we have two alter passwords which one should we use to log into the router? Let's try the first password. "dolphins" first: R1>alter Password: Password:When you're prompted for the password a back up time you experience you got it do by the first time! Let's try "saints": R1>alter Password: Password: R1#When both the alter secret and alter password commands are in use on a Cisco router the enable secret password always takes precedence. "dolphins" didn't get us in but "saints" did. That's valuable information for both the CCNA certification exam and real-world networks because there's no worse feeling than typing a password at a Cisco router prompt and then getting another password cause!This is just one way to perform basic Cisco router security with passwords. We'll take a be at other methods in a future CCNA certification exam training tutorial!by: Chris Bryant. CCIE #12933

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Related article:
http://onlinedatacenter.blogspot.com/2007/11/passwords-cisco-routers-and-network.html

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