How to restrict access SSHD access to user@1.1.1.1 only and deny all

Linux
,
1

Is there a way to restrict only one user to ssh into a machine

say for instance i want to all all users to ssh to this hosts, but only allow user1 to ssh to this hosts from hostB

something like user1@* deny but user1@1.1.1.1 allow and any other user allow access via ssh ?

2

yes, AllowUsers and DenyUsers. The allow/deny users directives are processed in the following order:

DenyUsers user@host
AllowUsers user@host

In other words, the following is all you need

DenyUsers user1@1.1.1.1