configure NFSv4 server

You need to use the nohide option when using gss/krb5 to see anything that was mounted using bind


/exports             gss/krb5p(rw,sync,fsid=0,no_subtree_check)
/exports/home   gss/krb5p(rw,sync,nohide,no_subtree_check)

configure Kerberos to provide user authentication

Install kerberos server packages

[root@auth1 /]# yum install krb5-server

Add the following rules to iptables


-A RH-Firewall-1-INPUT -m state --state NEW -m tcp -p tcp --dport 88 -j ACCEPT
-A RH-Firewall-1-INPUT -m state --state NEW -m udp -p udp --dport 88 -j ACCEPT
-A RH-Firewall-1-INPUT -m state --state NEW -m tcp -p tcp --dport 464 -j ACCEPT
-A RH-Firewall-1-INPUT -m state --state NEW -m udp -p udp --dport 464 -j ACCEPT
-A RH-Firewall-1-INPUT -m state --state NEW -m tcp -p tcp --dport 749 -j ACCEPT

Edit the kdc conf file

[root@auth1 /]# vim /var/kerberos/krb5kdc/kdc.conf

[kdcdefaults]

 v4_mode = nopreauth

 kdc_tcp_ports = 88

[realms]

 auth1.EXAMPLE.COM = {

  #master_key_type = des3-hmac-sha1

  default_priniciple_flags = +preauth

  acl_file = /var/kerberos/krb5kdc/kadm5.acl

  dict_file = /usr/share/dict/words

  admin_keytab = /var/kerberos/krb5kdc/kadm5.keytab

  supported_enctypes = aes256-cts:normal aes128-cts:normal des3-hmac-sha1:normal arcfour-hmac:normal des-hmac-sha1:normal des-cbc-md5:normal des-cbc-crc:normal des-cbc-crc:v4 des-cbc-crc:afs3

 }

Initialise the database

[root@auth1 /]# kdb5_util create

Log in as kadmin.local and create the princs

[root@auth1 /]# kadmin.local

configure an NIS server to provide directory services

[root@ds1 ~]# yum install ypserv

[root@ds1 ~]# chkconfig portmap on

add the following to iptables

-A RH-Firewall-1-INPUT -m state --state NEW -m tcp -p tcp --dport 111 -j ACCEPT

-A RH-Firewall-1-INPUT -m state --state NEW -m udp -p udp --dport 111 -j ACCEPT

add the following to /etc/sysconfig/network

YPSERV_ARGS="-p 841"

add the following to iptables

-A RH-Firewall-1-INPUT -m state --state NEW -m tcp -p tcp --dport 808 -j ACCEPT

-A RH-Firewall-1-INPUT -m state --state NEW -m udp -p udp --dport 808 -j ACCEPT

Set the NIS domain name

[root@auth1 ~]# nisdomainname NISDOMAINNAME

Start NIS

[root@auth1 ~]# service ypserv start

Initialise maps

[root@auth1 /]# /usr/lib/yp/ypinit -m

check access to maps

[root@client ~]#  ypcat  -d auth1.example.com -h auth1.example.com passwd

Lock down using securenets

[root@auth1 /]# vim /var/yp/securenets

SUBNETMASK NETWORKADDRESS