SSH IP access restriction using tcpwrappers is not working. (hosts.allow and hosts.deny not taken into...

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I am using sles-12 server and i am trying to restrict ssh access to my server to my pc alone. I have tried to use tcpwrappers and it's not working..!!. I am able to ssh to the server from any IP in my local network.

I have tried different formats from man page to see if anything is working but to no effect. Here is the files I have used for setting the wrappers and commands which might be useful

[root@myserver ~]# cat /etc/hosts.allow

sshd:172.19.112.120

[root@myserver ~]# cat /etc/hosts.deny

sshd:ALL

[root@myserver ~]#  tcpdmatch -d -i /etc/xinetd.conf sshd 135.250.164.106 --> another server

client:   hostname paranoid

client:   address  135.250.164.106

server:   process  sshd

access:   granted  --> NOT OK

[root@myserver ~]#

[root@myserver ~]# ldd /usr/sbin/sshd | grep 'libwrap'

        libwrap.so.0 => /lib64/libwrap.so.0 (0x00007fa2b71f7000)

PS: IP table restrictions are working fine. But I can't use it in my scenario. and no specific configurations are done in /etc/ssh/ssh_config

asked Dec 3 at 9:54

Ajay Joseph

New contributor

I have found the problem on why it's not working. I am using openssh v 7.2 and tcpwrappers support is removed from openssh from version 6.7 onwards. Link --> openssh.com/releasenotes.html (Check release notes of version 6.7).
– Ajay Joseph
17 hours ago

add a comment |

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I have tried different formats from man page to see if anything is working but to no effect. Here is the files I have used for setting the wrappers and commands which might be useful

[root@myserver ~]# cat /etc/hosts.allow

sshd:172.19.112.120

[root@myserver ~]# cat /etc/hosts.deny

sshd:ALL

[root@myserver ~]#  tcpdmatch -d -i /etc/xinetd.conf sshd 135.250.164.106 --> another server

client:   hostname paranoid

client:   address  135.250.164.106

server:   process  sshd

access:   granted  --> NOT OK

[root@myserver ~]#

[root@myserver ~]# ldd /usr/sbin/sshd | grep 'libwrap'

        libwrap.so.0 => /lib64/libwrap.so.0 (0x00007fa2b71f7000)

PS: IP table restrictions are working fine. But I can't use it in my scenario. and no specific configurations are done in /etc/ssh/ssh_config

asked Dec 3 at 9:54

Ajay Joseph

New contributor

I have found the problem on why it's not working. I am using openssh v 7.2 and tcpwrappers support is removed from openssh from version 6.7 onwards. Link --> openssh.com/releasenotes.html (Check release notes of version 6.7).
– Ajay Joseph
17 hours ago

add a comment |

up vote
0
down vote

favorite

I have tried different formats from man page to see if anything is working but to no effect. Here is the files I have used for setting the wrappers and commands which might be useful

[root@myserver ~]# cat /etc/hosts.allow

sshd:172.19.112.120

[root@myserver ~]# cat /etc/hosts.deny

sshd:ALL

[root@myserver ~]#  tcpdmatch -d -i /etc/xinetd.conf sshd 135.250.164.106 --> another server

client:   hostname paranoid

client:   address  135.250.164.106

server:   process  sshd

access:   granted  --> NOT OK

[root@myserver ~]#

[root@myserver ~]# ldd /usr/sbin/sshd | grep 'libwrap'

        libwrap.so.0 => /lib64/libwrap.so.0 (0x00007fa2b71f7000)

PS: IP table restrictions are working fine. But I can't use it in my scenario. and no specific configurations are done in /etc/ssh/ssh_config

asked Dec 3 at 9:54

Ajay Joseph

New contributor

I have tried different formats from man page to see if anything is working but to no effect. Here is the files I have used for setting the wrappers and commands which might be useful

[root@myserver ~]# cat /etc/hosts.allow

sshd:172.19.112.120

[root@myserver ~]# cat /etc/hosts.deny

sshd:ALL

[root@myserver ~]#  tcpdmatch -d -i /etc/xinetd.conf sshd 135.250.164.106 --> another server

client:   hostname paranoid

client:   address  135.250.164.106

server:   process  sshd

access:   granted  --> NOT OK

[root@myserver ~]#

[root@myserver ~]# ldd /usr/sbin/sshd | grep 'libwrap'

        libwrap.so.0 => /lib64/libwrap.so.0 (0x00007fa2b71f7000)

PS: IP table restrictions are working fine. But I can't use it in my scenario. and no specific configurations are done in /etc/ssh/ssh_config

linux ssh security

asked Dec 3 at 9:54

Ajay Joseph

New contributor

asked Dec 3 at 9:54

Ajay Joseph

New contributor

asked Dec 3 at 9:54

Ajay Joseph

New contributor

asked Dec 3 at 9:54

Ajay Joseph

asked Dec 3 at 9:54

Ajay Joseph

New contributor

Ajay Joseph is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.

I have found the problem on why it's not working. I am using openssh v 7.2 and tcpwrappers support is removed from openssh from version 6.7 onwards. Link --> openssh.com/releasenotes.html (Check release notes of version 6.7).
– Ajay Joseph
17 hours ago

add a comment |

I have found the problem on why it's not working. I am using openssh v 7.2 and tcpwrappers support is removed from openssh from version 6.7 onwards. Link --> openssh.com/releasenotes.html (Check release notes of version 6.7).
– Ajay Joseph
17 hours ago

I have found the problem on why it's not working. I am using openssh v 7.2 and tcpwrappers support is removed from openssh from version 6.7 onwards. Link --> openssh.com/releasenotes.html (Check release notes of version 6.7).
– Ajay Joseph
17 hours ago

add a comment |

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