15 Augustus » voorbeeld

Zo maak ik een backup van mijn bestanden

Robin — Tue, 26 Aug 2008 21:07:46 +0000

Inpakken: tar czf - path | gpg ––recipient recipient ––encrypt | split -b1G - name.tgz.gpg.

Uitpakken: cat name.tgz.gpg.* | gpg ––decrypt | tar tzf -

SSH host based authentication

Robin — Tue, 30 May 2006 12:05:10 +0000

Genereer een key pair:

[robin@fromhost ~]$ ssh-keygen -t dsa
Generating public/private dsa key pair.
Enter file in which to save the key (/home/robin/.ssh/id_dsa):
Enter passphrase (empty for no passphrase):
Enter same passphrase again:
Your identification has been saved in /home/robin/.ssh/id_dsa.
Your public key has been saved in /home/robin/.ssh/id_dsa.pub.
The key fingerprint is:
75:ed:f7:06:00:02:65:3e:4d:7b:fb:cf:4c:59:fc:63 robin@fromhost

Kopieer public key naar de remote host:

[robin@fromhost ~]$ scp .ssh/id_dsa.pub robin@tohost:/home/robin/
Password:
id_dsa.pub               100% 1131     1.1KB/s   00:00

Voeg de public key toe aan de lijst met geauthorizeerde keys:

robin@tohost$ cat id_dsa.pub >> .ssh/authorized_keys

Zorg dat je .ssh directory en de lijst met keys niet world-readable zijn:

robin@tohost$ chmod 600 .ssh/authorized_keys
robin@tohost$ chmod 700 .ssh

SMTP authenticatie

Robin — Tue, 23 May 2006 11:58:57 +0000

$ printf "robin\0robin\0geheim" | mmencode
cm9iaW4Acm9iaW4AZ2VoZWlt

$ telnet smtphost 25
Trying 18.67.13.317
Connected to smtphost.
Escape character is "^]".
220 Domain.com SMTP Server
HELO mailserver
250 smtp.domain.com
AUTH PLAIN cm9iaW4Acm9iaW4AZ2VoZWlt
235 Authentication successful

$ printf "robin" | mmencode
cm9iaW4=
$ printf "geheim" | mmencode
Z2VoZWlt

$ telnet smtphost 25
Trying 18.67.13.317
Connected to smtphost.
Escape character is "^]".
220 Domain.com SMTP Server
HELO mailserver
250 smtp.domain.com
AUTH LOGIN
334 VXNlcm5hbWU6
cm9iaW4=
334 UGFzc3dvcmQ6
Z2VoZWlt
235 Authentication successful

Let op: Gebruik geen echo in plaats van printf; echo stuurt \n !

POP3 authenticatie

Robin — Tue, 23 May 2006 11:57:19 +0000

$ telnet pop3host 110
Trying 18.67.13.317
Connected to pop3host.
Escape character is "^]".
+OK Hello there.
USER robin
+OK Password required.
PASS geheim
+OK logged in.

IMAP authenticatie

Robin — Tue, 23 May 2006 11:56:28 +0000

AUTH=LOGIN

$ telnet imaphost 143
Trying 18.67.13.317...
Connected to imaphost.
Escape character is "^]".
* OK
01 LOGIN robin geheim
01 OK Logged in.

AUTH=PLAIN

$ printf "robin\0robin\0geheim" | mmencode
cm9iaW4Acm9iaW4AZ2VoZWlt

$ telnet imaphost 143
Trying 18.67.13.317...
Connected to imaphost .
Escape character is '^]'.
* OK
01 AUTHENTICATE PLAIN
+
cm9iaW4Acm9iaW4AZ2VoZWlt
01 OK Logged in.