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c.f. bug 424647
List Archive: gentoo-user-hu
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To: gentoo-user-hu@g.o
From: cjvt <cjvt@...>
Subject: Re: sshd reverse mapping problema
Date: Tue, 13 Mar 2007 12:39:22 +0100
$ cat sshd_config

#       $OpenBSD: sshd_config,v 1.74 2006/07/19 13:07:10 dtucker Exp $

# This is the sshd server system-wide configuration file.  See
# sshd_config(5) for more information.

# This sshd was compiled with PATH=/usr/bin:/bin:/usr/sbin:/sbin

# The strategy used for options in the default sshd_config shipped with
# OpenSSH is to specify options with their default value where
# possible, but leave them commented.  Uncommented options change a
# default value.

Port 225
Protocol 2
#AddressFamily any
#ListenAddress 0.0.0.0
#ListenAddress ::

# HostKey for protocol version 1
#HostKey /etc/ssh/ssh_host_key
# HostKeys for protocol version 2
#HostKey /etc/ssh/ssh_host_rsa_key
#HostKey /etc/ssh/ssh_host_dsa_key

# Lifetime and size of ephemeral version 1 server key
#KeyRegenerationInterval 1h
#ServerKeyBits 768

# Logging
# obsoletes QuietMode and FascistLogging
#SyslogFacility AUTH
#LogLevel INFO

# Authentication:

#LoginGraceTime 2m
PermitRootLogin no
#StrictModes yes
#MaxAuthTries 6

#RSAAuthentication yes
#PubkeyAuthentication yes
#AuthorizedKeysFile     .ssh/authorized_keys

# For this to work you will also need host keys in /etc/ssh/ssh_known_hosts
#RhostsRSAAuthentication no
# similar for protocol version 2
#HostbasedAuthentication no
# Change to yes if you don't trust ~/.ssh/known_hosts for
# RhostsRSAAuthentication and HostbasedAuthentication
#IgnoreUserKnownHosts no
# Don't read the user's ~/.rhosts and ~/.shosts files
#IgnoreRhosts yes

# To disable tunneled clear text passwords, change to no here!
PasswordAuthentication no
#PermitEmptyPasswords no

# Change to no to disable s/key passwords
#ChallengeResponseAuthentication yes

# Kerberos options
#KerberosAuthentication no
#KerberosOrLocalPasswd yes
#KerberosTicketCleanup yes
#KerberosGetAFSToken no

# GSSAPI options
#GSSAPIAuthentication no
#GSSAPICleanupCredentials yes

# Set this to 'yes' to enable PAM authentication, account processing,
# and session processing. If this is enabled, PAM authentication will
# be allowed through the ChallengeResponseAuthentication and
# PasswordAuthentication.  Depending on your PAM configuration,
# PAM authentication via ChallengeResponseAuthentication may bypass
# the setting of "PermitRootLogin without-password".
# If you just want the PAM account and session checks to run without
# PAM authentication, then enable this but set PasswordAuthentication
# and ChallengeResponseAuthentication to 'no'.
UsePAM no

#AllowTcpForwarding yes
#GatewayPorts no
#X11Forwarding no
#X11DisplayOffset 10
#X11UseLocalhost yes
#PrintMotd yes
#PrintLastLog yes
#TCPKeepAlive yes
#UseLogin no
#UsePrivilegeSeparation yes
#PermitUserEnvironment no
#Compression delayed
#ClientAliveInterval 0
#ClientAliveCountMax 3
UseDNS no
#PidFile /var/run/sshd.pid
#MaxStartups 10
#PermitTunnel no

# no default banner path
#Banner /some/path

# override default of no subsystems
Subsystem       sftp    /usr/lib64/misc/sftp-server

# Example of overriding settings on a per-user basis
#Match User anoncvs
#       X11Forwarding no
#       AllowTcpForwarding no
#       ForceCommand cvs server


vt
2007. március 13. dátummal Aleph ezt írta:
> A baj az, hogy a jelszavas azonosítás nincs engedélyezve, de elvárja. Ezért
> a public-key sikeressége után elutasít. Ha minden igaz akkor a
> configfile-ban nincs kommentelve a pam-ot engedélyező sor.
>
> Aleph
>
> 2007/3/13, cjvt <cjvt@...>:
> > udv Mindenki,
> >
> > Van egy olyan problemam, hogy nem tudom mi okbol, de az sshd eltanacsol:
> >
> > Ha a kliensen (ubuntu - 192.168.1.1) probalkozom, ez az eredmeny:
> >
> > $ ssh user@... -p 225 -v
> >
> > OpenSSH_4.3p2 Debian-5ubuntu1, OpenSSL 0.9.8b 04 May 2006
> > debug1: Reading configuration data /etc/ssh/ssh_config
> > debug1: Applying options for *
> > debug1: Connecting to 192.168.1.50 [192.168.1.50] port 225.
> > debug1: Connection established.
> > debug1: identity file /home/user/.ssh/identity type -1
> > debug1: identity file /home/user/.ssh/id_rsa type -1
> > debug1: identity file /home/user/.ssh/id_dsa type -1
> > debug1: Remote protocol version 2.0, remote software version OpenSSH_4.6
> > debug1: match: OpenSSH_4.6 pat OpenSSH*
> > debug1: Enabling compatibility mode for protocol 2.0
> > debug1: Local version string SSH-2.0-OpenSSH_4.3p2 Debian-5ubuntu1
> > debug1: SSH2_MSG_KEXINIT sent
> > debug1: SSH2_MSG_KEXINIT received
> > debug1: kex: server->client aes128-cbc hmac-md5 none
> > debug1: kex: client->server aes128-cbc hmac-md5 none
> > debug1: SSH2_MSG_KEX_DH_GEX_REQUEST(1024<1024<8192) sent
> > debug1: expecting SSH2_MSG_KEX_DH_GEX_GROUP
> > debug1: SSH2_MSG_KEX_DH_GEX_INIT sent
> > debug1: expecting SSH2_MSG_KEX_DH_GEX_REPLY
> > debug1: Host '192.168.1.50' is known and matches the RSA host key.
> > debug1: Found key in /home/user/.ssh/known_hosts:1
> > debug1: ssh_rsa_verify: signature correct
> > debug1: SSH2_MSG_NEWKEYS sent
> > debug1: expecting SSH2_MSG_NEWKEYS
> > debug1: SSH2_MSG_NEWKEYS received
> > debug1: SSH2_MSG_SERVICE_REQUEST sent
> > debug1: SSH2_MSG_SERVICE_ACCEPT received
> > debug1: Authentications that can continue: publickey
> > debug1: Next authentication method: publickey
> > debug1: Trying private key: /home/user/.ssh/identity
> > debug1: Trying private key: /home/user/.ssh/id_rsa
> > debug1: Trying private key: /home/user/.ssh/id_dsa
> > debug1: No more authentication methods to try.
> > Permission denied (publickey).
> >
> >
> > a szerver (gentoo - 192.168.1.50) ugyanakkor ezt mondja a lognak:
> >
> >
> > reverse mapping checking getaddrinfo for server [192.168.1.1] failed -
> > POSSIBLE BREAK-IN ATTEMPT!
> >
> > valaki tudja, mit editaltam tonkre? ;)
> >
> > vt
> > --
> > gentoo-user-hu@g.o mailing list


--
gentoo-user-hu@g.o mailing list


Replies:
Re: sshd reverse mapping problema
-- Aleph
References:
sshd reverse mapping problema
-- cjvt
Re: sshd reverse mapping problema
-- Aleph
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Updated Jun 17, 2009

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