[SOLVED] SSH problem

[ndurjoy3002]

Hi

I am new to this forum. I am using Linux version 2.6.18-8.el5xen. I have two nic card. One is configured as local block ip and another is configured with real ip. I can't ssh from outside (i mean on real ip) local lan. But i can ssh on another nic card which is configured as local lan ip. but somedays ago i could ssh from my home but now i cant. I stopped IPtables but still i cant. so what should i do, please advise.

Thanks

Durjoy

[Lazydog]

Hi

I am new to this forum. I am using Linux version 2.6.18-8.el5xen. I have two nic card. One is configured as local block ip and another is configured with real ip.

Lets get the terminology correct. IP Addresses are Public or Private. Both are real.
Public would be what you called Real
Private would be what you called Local

I can't ssh from outside (i mean on real ip) local lan.

This could be because your provider might be blocking all port lower then 1024.

But i can ssh on another nic card which is configured as local lan ip.

Do you have anything configure in the sshd.config to tell it to only listen on one address?

but somedays ago i could ssh from my home but now i cant. I stopped IPtables but still i cant. so what should i do, please advise.

Are your sure the other side has the SSH Demon running?

[ndurjoy3002]

Dear Robert,


Thanks for your reply.

Lets get the terminology correct. IP Addresses are Public or Private. Both are real.
Public would be what you called Real
Private would be what you called Local

My one Ip is public and other is private

This could be because your provider might be blocking all port lower then 1024.

If i stop Iptables then i cant ssh from my home. I use a local Ip provided by another provider.

Do you have anything configure in the sshd.config to tell it to only listen on one address?

Below i am giving you my sshd_config.

Are your sure the other side has the SSH Demon running?

I am not sure how to check?





configuration of sshd_config file.

# $OpenBSD: sshd_config,v 1.73 2005/12/06 22:38:28 reyk Exp $

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

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

# 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 20202
#Protocol 2,1
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
SyslogFacility AUTHPRIV
#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 yes
#PermitEmptyPasswords no
PasswordAuthentication yes

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

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

# GSSAPI options
#GSSAPIAuthentication no
GSSAPIAuthentication yes
#GSSAPICleanupCredentials yes
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 mechanism.
# Depending on your PAM configuration, this may bypass the setting of
# PasswordAuthentication, PermitEmptyPasswords, and
# "PermitRootLogin without-password". If you just want the PAM account and
# session checks to run without PAM authentication, then enable this but set
# ChallengeResponseAuthentication=no
#UsePAM no
UsePAM yes
# Accept locale-related environment variables
AcceptEnv LANG LC_CTYPE LC_NUMERIC LC_TIME LC_COLLATE LC_MONETARY LC_MESSAGES
AcceptEnv LC_PAPER LC_NAME LC_ADDRESS LC_TELEPHONE LC_MEASUREMENT
AcceptEnv LC_IDENTIFICATION LC_ALL
#AllowTcpForwarding yes
#GatewayPorts no
#X11Forwarding no
X11Forwarding yes
#X11DisplayOffset 10
#X11UseLocalhost yes
#PrintMotd yes
#PrintLastLog yes
#TCPKeepAlive yes
#UseLogin no
#UsePrivilegeSeparation yes
#PermitUserEnvironment no
#Compression delayed
#ClientAliveInterval 0
#ClientAliveCountMax 3
#ShowPatchLevel no
#UseDNS yes
#PidFile /var/run/sshd.pid
#MaxStartups 10
#PermitTunnel no

# no default banner path
#Banner /some/path

# override default of no subsystems
Subsystem sftp /usr/libexec/openssh/sftp-server


please give me your suggestion.


Thanks

Durjoy

[ndurjoy3002]

Dear Robert,

My problem is solved. Its not my linux its my firewall which was blocking me. Any way thanks again for your humble cooperation.

Regards
Durjoy