Why the limit through telnet is not the same if selinux is enabled

Issue

• The limits seen after a login through telnet is not the same if selinux is enabled or not:

  • Selinux disabled:

  [root@rhel610 ~]# telnet 127.0.0.1
  Trying 127.0.0.1...
  Connected to 127.0.0.1.
  Escape character is '^]'.
  Red Hat Enterprise Linux Server release 6.10 (Santiago)
  Kernel 2.6.32-754.el6.x86_64 on an x86_64
  rhel610 login: test
  Password:
  Last login: Fri Oct 18 15:28:06 from localhost
  [test@rhel610 ~]$
  [test@rhel610 ~]$ cat /etc/redhat-release
  Red Hat Enterprise Linux Server release 6.10 (Santiago)
  [test@rhel610-storage ~]$ ulimit -n
  4096
  

  • Selinux enabled:

  [root@rhel610 ~]# ssh test@127.0.0.1
  test@127.0.0.1's password:
  Last login: Fri Oct 18 15:27:07 2019 from localhost
  [test@rhel610-storage ~]$ cat /etc/redhat-release
  Red Hat Enterprise Linux Server release 6.10 (Santiago)
  [test@rhel610-storage ~]$ ulimit -n
  1024