SSH IP access restriction using tcpwrappers is not working. (hosts.allow and hosts.deny not taken into account)
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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
linux ssh security
asked Dec 3 at 9:54
Ajay Joseph
1
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up vote
0
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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
linux ssh security
asked Dec 3 at 9:54
Ajay Joseph
1
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
Dec 6 at 11:22
add a comment |
up vote
0
down vote
favorite
up vote
0
down vote
favorite
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
linux ssh security
asked Dec 3 at 9:54
Ajay Joseph
1
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
linux ssh security
linux ssh security
asked Dec 3 at 9:54
Ajay Joseph
1
asked Dec 3 at 9:54
Ajay Joseph
1
asked Dec 3 at 9:54
Ajay Joseph
1
asked Dec 3 at 9:54
Ajay Joseph
1
asked Dec 3 at 9:54
Ajay Joseph
1
1
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
Dec 6 at 11:22
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
Dec 6 at 11:22
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
Dec 6 at 11:22
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
Dec 6 at 11:22
add a comment |
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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
Dec 6 at 11:22