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 Komentářů: 21, poslední 13.8. 09:57
    Rozcestník

    Dotaz: Smtps pop3s Qmail

    20.8.2004 16:14 Martin
    Smtps pop3s Qmail
    Přečteno: 331×
    Muzete me nekdo navest na spravnou cestu, jak rozchodit smtp a pop3 pres SSL ? na imap sem nasel nejakej navod ale na tohle ne, dik.

    Odpovědi

    20.8.2004 16:30 #2453 | skóre: 21
    Rozbalit Rozbalit vše Re: Smtps pop3s Qmail
    Jednoduse - man stunnel...

    Tomas
    20.8.2004 19:49 Martin
    Rozbalit Rozbalit vše Re: Smtps pop3s Qmail
    Tenhle manual bohuzel nemam, nekde jinde ;-) ?
    20.8.2004 20:16 #2453 | skóre: 21
    Rozbalit Rozbalit vše Re: Smtps pop3s Qmail
    NAME
           stunnel - universal SSL tunnel
    
    SYNOPSIS
           stunnel [-c | -T] [-D [facility.]level] [-O
           a|l|r:option=value[:value]] [-o file] [-C cipherlist] [-p
           pemfile] [-v level] [-A certfile] [-S sources] [-a
           directory] [-t timeout] [-u ident_username]
           [-s setuid_user] [-g setgid_group] [-n protocol]
           [-P { dir/ | filename | none } ] [-B bytes] [-R randfile]
           [-W] [-E socket] [-I host] [-d [host:]port [-f] ]
           [ -r [host:]port | { -l | -L } program [--
           progname args] ]
    
    DESCRIPTION
           The stunnel program is designed to work as SSL encryption
           wrapper between remote clients and local (inetd-startable)
           or remote servers. The concept is that having non-SSL
           aware daemons running on your system you can easily set
           them up to communicate with clients over secure SSL
           channels.
    
           stunnel can be used to add SSL functionality to commonly
           used inetd daemons like POP-2, POP-3, and IMAP servers, to
           standalone daemons like NNTP, SMTP and HTTP, and in
           tunneling PPP over network sockets without changes to the
           source code.
    
           This product includes cryptographic software written by
           Eric Young (eay@cryptsoft.com)
    
    OPTIONS
           -h  Print stunnel help menu
    
           -V  Print stunnel version and compile time defaults
    
           -D level
               Debugging level
    
               Level is a one of the syslog level names or numbers
               emerg (0), alert (1), crit (2), err (3), warning (4),
               notice (5), info (6), or debug (7).  All logs for the
               specified level and all levels numerically less than
               it will be shown.  Use -D debug or -D 7 for greatest
               debugging output.  The default is notice (5).
    
               The syslog facility 'daemon' will be used unless a
               facility name is supplied.  (Facilities are not
               supported on windows.)
    
               Case is ignored for both facilities and levels.
    
           -O a|l|r:option=value[:value]
               Set an option on accept/local/remote socket
    
               The values for linger option are l_onof:l_linger. The
               values for time are tv_sec:tv_usec.
    
               Examples:
    
               -O l:SO_LINGER=1:60 - set one minute timeout for
               closing local socket
    
               -O r:TCP_NODELAY=1 - turn off the Nagle algorithm for
               remote sockets
    
               -O r:SO_OOBINLINE=1 - place out-of-band data directly
               into the receive data stream for remote sockets
    
               -O a:SO_REUSEADDR=0 - disable address reuse (enabled
               by default)
    
               -O a:SO_BINDTODEVICE=lo - only accept connections on
               loopback interface
    
               See 'stunnel -V' for options supported on your system
               and their default values.
    
           -o file
               Append log messages to a file.
    
           -C cipherlist
               Select permitted SSL ciphers
    
               A colon delimited list of the ciphers to allow in the
               SSL connection.  For example DES-CBC3-SHA:IDEA-CBC-MD5
    
           -c  client mode (remote service uses SSL)
    
               default: server mode
    
           -T  transparent proxy mode
    
               Re-write address to appear as if wrapped daemon is
               connecting from the SSL client machine instead of the
               machine running stunnel. Available only on some
               operating systems (Linux only, we believe) and then
               only in server mode. Note that this option will not
               combine with proxy mode (-r) unless the client's
               default route to the target machine lies through the
               host running stunnel, which cannot be localhost.
    
           -p pemfile
               private key and certificate chain PEM file name
    
               A PEM is always needed in server mode (see stunnel -V
               output for default). Specifying this flag in client
               mode will use this key and certificate chain as a
               client side certificate chain.  Using client side
               certs is optional. The certificates must be in PEM
               format and must be sorted starting with the
               certificate to the highest level (root CA).
    
           -v level
               verify peer certificate
    
           ·           level 1 - verify peer certificate if present
    
           ·           level 2 - verify peer certificate
    
           ·           level 3 - verify peer with locally installed
                       certificate
    
           ·           default - no verify
    
           -a directory
               client certificate directory
    
               This is the directory in which stunnel will look for
               certificates when using the -v options. Note that the
               certificates in this directory should be named
               XXXXXXXX.0 where XXXXXXXX is the hash value of the
               cert. This directory will override the stunnel
               compile-time default, if any.
    
               See stunnel -V output for default.
    
           -A certfile
               Certificate Authority file
    
               This file contains multiple CA certificates, used with
               the -v options. This file will override the stunnel
               compile-time default, if any.
    
               See stunnel -V output for default.
    
           -S sources
               Certificate source defaults
    
               Both stunnel and the SSL library used to compile
               stunnel have default locations to look for your
               certificate file (-A option) and certificate
               directories (-a option).  The -S flag allows you to
               control which of these default sources, if any, should
               be used.
    
                   0 = ignore all default sources
                   1 = use ssl library defaults
                   2 = use stunnel defaults
                   3 = use both ssl library and stunnel defaults
    
               (See stunnel -V output for the default.)
    
               Note that the -A and -a flags overwrite, not
               supplement, the stunnel defaults, whereas the ssl
               library defaults, if enabled, are used in addition to
               the other sources.
    
               In general, to avoid hurting one's brain, use -S 0 and
               explicitly set -A and/or -a as desired.
    
           -t timeout
               session cache timeout
    
               default: 300 seconds.
    
           -N servicename
               Service name to use for tcpwrappers. If not specified
               then a tcpwrapper service name will be generated
               automatically for you. This will also be used when
               auto-generating pid filenames.
    
           -u ident_username
               Use IDENT (RFC 1413) username checking
    
           -n proto
               Negotiate SSL with specified protocol
    
               currently supported: smtp, pop3, nntp
    
           -E socket
               Entropy Gathering Daemon socket to use to feed OpenSSL
               random number generator.  (Available only if compiled
               with OpenSSL 0.9.5a or higher)
    
           -R filename
               File containing random input.  The SSL library will
               use data from this file first to seed the random
               number generator.
    
           -W  Do not overwrite the random seed files with new random
               data.
    
           -B bytes
               Number of bytes of data read from random seed files.
               With SSL versions less than 0.9.5a, also determines
               how many bytes of data are considered sufficient to
               seed the PRNG.  More recent OpenSSL versions have a
               builtin function to determine when sufficient
               randomness is available.
    
           -I host
               IP of the outgoing interface is used as source for
               remote connections.  Use this option to bind a static
               local IP address, instead.
    
           -d [host:]port
               daemon mode
    
               Listen for connections on [host:]port. If no host
               specified, defaults to all IP addresses for the local
               host.
    
               default: inetd mode
    
           -f  foreground mode
    
               Stay in foreground (don't fork) and log to stderr
               instead of via syslog (unless -o is specified).
    
               default: background in daemon mode
    
           -l program [-- programname [arg1 arg2 arg3...]  ]
               execute local inetd-type program.
    
           -L program [-- programname [arg1 arg2 arg3...]  ]
               open local pty and execute program.
    
           -s username
               setuid() to username in daemon mode
    
           -g groupname
               setgid() to groupname in daemon mode. Clears all other
               groups.
    
           -P { dir/ | file | none }
               Pid file location
    
               If the argument is a pathname ending in a slash, then
               a pid file named "stunnel.servicename.pid" will be
               created in the specified directory.  If the argument
               is a filename (no trailing slash), then that filename
               will be used for the pid. If the argument is 'none',
               then no pid file will be created.
    
           -r [host:]port
               connect to remote service
    
               If no host specified, defaults to localhost.
    
    EXAMPLES
           In order to provide SSL encapsulation to your local imapd
           service, use
    
             stunnel -d 993 -l /usr/sbin/imapd -- imapd
    
           If you want to provide tunneling to your pppd daemon on
           port 2020, use something like
    
             stunnel -d 2020 -L /usr/sbin/pppd -- pppd local
    
    
    CERTIFICATES
           Each SSL enabled daemon needs to present a valid X.509
           certificate to the peer. It also needs a private key to
           decrypt the incoming data.  The easiest way to obtain a
           certificate and a key is to generate them with the free
           openssl package. You can find more information on
           certificates generation on pages listed below.
    
           Two things are important when generating certificate-key
           pairs for stunnel. The private key cannot be encrypted,
           because the server has no way to obtain the password from
           the user. To produce an unencrypted key add the -nodes
           option when running the req command from the openssl kit.
    
           The order of contents of the .pem file is also important.
           It should contain the unencrypted private key first, then
           a signed certificate (not certificate request). There
           should be also empty lines after certificate and private
           key. Plaintext certificate information appended on the top
           of generated certificate should be discarded. So the file
           should look like this:
    
             -----BEGIN RSA PRIVATE KEY-----
             [encoded key]
             -----END RSA PRIVATE KEY-----
             [empty line]
             -----BEGIN CERTIFICATE-----
             [encoded certificate]
             -----END CERTIFICATE-----
             [empty line]
    
    
    RANDOMNESS
           stunnel needs to seed the PRNG (pseudo random number
           generator) in order for SSL to use good randomness.  The
           following sources are loaded in order until sufficient
           random data has been gathered:
    
           ·   The file specified with the -R flag.
    
           ·   The file specified by the RANDFILE environment
               variable, if set.
    
           ·   The file .rnd in your home directory, if RANDFILE not
               set.
    
           ·   The file specified with '--with-random' at compile
               time.
    
           ·   The contents of the screen if running on Windows.
    
           ·   The egd socket specified with the -E flag.
    
    
    
           ·   The egd socket specified with '--with-egd-sock' at
               compile time.
    
           ·   The /dev/urandom device.
    
           With recent (>=OpenSSL 0.9.5a) version of SSL it will stop
           loading random data automatically when sufficient entropy
           has been gathered.  With previous versions it will
           continue to gather from all the above sources since no SSL
           function exists to tell when enough data is available.
    
           Note that on Windows machines that do not have console
           user interaction (mouse movements, creating windows, etc)
           the screen contents are not variable enough to be
           sufficient, and you should provide a random file for use
           with the -R flag.
    
           Note that the file specified with the -R flag should
           contain random data -- that means it should contain
           different information each time stunnel is run.  This is
           handled automatically unless the -W flag is used.  If you
           wish to update this file manually, the openssl rand
           command in recent versions of OpenSSL, would be useful.
    
           One important note -- if /dev/urandom is available,
           OpenSSL has a habit of seeding the PRNG with it even when
           checking the random state, so on systems with /dev/urandom
           you're likely to use it even though it's listed at the
           very bottom of the list above.  This isn't stunnel's
           behaviour, it's OpenSSLs.
    
    LIMITATIONS
           stunnel cannot be used for the FTP daemon because of the
           nature of the FTP protocol which utilizes multiple ports
           for data transfers.  There are available SSL enabled
           versions of FTP and telnet daemons, however.
    
    SEE ALSO
           the tcpd(8) manpage
               access control facility for internet services
    
           the inetd(8) manpage
               internet ``super-server''
    
           http://stunnel.mirt.net/
               Stunnel homepage
    
           http://www.stunnel.org/
               Stunnel Frequently Asked Questions
    
           http://www.openssl.org/
               OpenSSL project website
    
    AUTHOR
           Michal Trojnara
               Michal.Trojnara AT mirt DOT net
    
    22.8.2004 23:08 Martin
    Rozbalit Rozbalit vše Re: Smtps pop3s Qmail
    Tak sem si uz nainstalovat stunnel, ale porad tomu nejak nerozumim, qmail mi jede pod tcpserverm, nemoh bys mi ty nebo nekdo ukazat nejakej fungcni priklad, co musim udelat pro to, abych tu SSL rouru udelal ? nebo jestli existujou nejaky priklady byl bych rad za radu, dik.
    23.8.2004 12:18 #2453 | skóre: 21
    Rozbalit Rozbalit vše Re: Smtps pop3s Qmail
    Takhle to mam ja:
    gate:/# cat /etc/init.d/stunnels
    #!/bin/sh
    # Secure tunnels
    
    case "$1" in
        start)
            echo -n "Making secure tunnels...       "
            stunnel -p /cesta/k/certifikatu -r 25 -d 465
            echo -n "SMTP-SSL "
            stunnel -p /cesta/k/certifikatu -r 110 -d 995
            echo -n "POP3-SSL."
        ;;
        stop)
            echo -n "Killing all Secure Tunnels...  "
            killall stunnel
            echo "done."
        ;;
        *)
            echo "Usage: $0 { start | stop }"
        ;;
    esac
    exit 0
    gate:/#
    
    Tomas

    PS: Ale ten manual bys mel stejne nastudovat... Tohle pisu ze mam dobrou naladu...
    23.8.2004 22:55 Martin
    Rozbalit Rozbalit vše Re: Smtps pop3s Qmail
    Diky moc,vypada to velice jednoduse, ja sem cet asi neco vic harcore, ani sem nevedel, co, jinak urcite manual cist budu, bez toho abych vedel jak to funguje bych nemoh zit, vyzkousim to ale asi az zejtra ;-)
    cooler avatar 4.9.2004 15:43 cooler | skóre: 19 | Medzilaborce
    Rozbalit Rozbalit vše Re: Smtps pop3s Qmail
    Stunnel neni najbezpecnejsie riesenie.Radsej zvolit aplikacie, ktore ssl priamo podporuju.Lokalne sa to da napadnut.
    24.8.2004 06:53 Peter Figura | skóre: 12 | blog: pefi | Modra
    Rozbalit Rozbalit vše Re: Smtps pop3s Qmail
    Podla mna sa oplati googlovat, hned prvy odkaz z googlu:

    Qmail: SMTP & POP3 via SSL

    http://www.ekkaia.org/software/mail/qmailssl.php

    Pekny navod je aj

    SSL over POP3, SMTP, and IMAP using Qmail

    http://www.nimkathana.com/cstump/howtos/qmail/
    24.8.2004 08:27 #2453 | skóre: 21
    Rozbalit Rozbalit vše Re: Smtps pop3s Qmail
    Taky reseni, ale ja vychazel z toho, ze uz ma funkcni sluzby a chce jen rozsirit sve moznosti o SSL, navic to ma takhle jednodussi.

    Tomas
    24.8.2004 11:11 Peter Figura | skóre: 12 | blog: pefi | Modra
    Rozbalit Rozbalit vše Re: Smtps pop3s Qmail
    Ja som iba vyvracal tvrdenie, ze sa nic take nada najst. A ono staci dat do googlu slova ako qmail pop3 ssl a google vrati dostatok navodov.
    24.8.2004 15:18 #2453 | skóre: 21
    Rozbalit Rozbalit vše Re: Smtps pop3s Qmail
    Ok, beru. Ja taky proti vam nic nenamital...
    2.9.2004 21:53 Martin
    Rozbalit Rozbalit vše Re: Smtps pop3s Qmail
    Tak sem to zkousel, jenze mi to napsalo tohle:
    # stunnel -p /usr/local/etc/stunnel/stunnel.pem -r 25 -d 465
    2004.09.02 21:51:40 LOG3[22362:1024]: -p: No such file or directory (2)
    
    Syntax:
    stunnel [filename] | -fd [n] | -help | -version | -sockets
        filename    - use specified config file instead of /usr/local/etc/stunnel/stunnel.conf
        -fd n       - read the config file from specified file descriptor
        -help       - get config file help
        -version    - display version and defaults
        -sockets    - display default socket options
    
    
    takze sem to zkousel spoustet i jinak, treba ze jako prvni parametr sem udev jmeno konfiguracniho souboru a pak to spustit slo, teda bez toho, aby to vyhodilo nejakou chybu, ale porad to nebezelo, nevite nekdo co dal ? Proc mi to pise chybu adresare nechapu, protoze tam ten soubor urcite je.
    4.9.2004 12:43 Martin
    Rozbalit Rozbalit vše Re: Smtps pop3s Qmail
    Uz nikdo nevi ?
    4.9.2004 14:05 Honza
    Rozbalit Rozbalit vše Re: Smtps pop3s Qmail
    Zdravim potřebuju pomoct s postfixem. Předem děkuji Honza pozice55@seznam.cz
    4.9.2004 14:10 jm
    Rozbalit Rozbalit vše Re: Smtps pop3s Qmail
    :-( :-( :-(

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