any guide to install/test nfs sec=krb5?

any guide to install/test nfs sec=krb5?

[Wang Yugui]

Hi,

Is there any guide to install/test nfs sec=krb5?

test env:
krb5 server : windows  active directory
linux: rocky linux 9.1,  already 'realm join' with sssd.

1) from redhat
https://access.redhat.com/documentation/en-us/red_hat_enterprise_linux/9/html/configuring_and_using_network_file_services/securing-nfs_configuring-and-using-network-file-services
Procedure
Create the nfs/hostname.domain@REALM principal on the NFS server side.
Create the host/hostname.domain@REALM principal on both the server and the client side.
Add the corresponding keys to keytabs for the client and server.

but we need more detail.


2, from isilon
http://doc.isilon.com/ECS/3.3/AdminGuide/ecs_t_file_access_confgure_kerberos.html
http://doc.isilon.com/ECS/3.7/AdminGuide/GUID-2018CF69-5F1E-4F3A-BA90-3659F85DE415.html
more detail than redhat.

but the following fail.
Test registration by running.
kinit -k host/<fqdn>@NFS-REALM.LOCAL

host/<fqdn> will is already created when 'realm join'?
host/<fqdn> is created here again, so there is some trouble?

'kinit -k nfs/<fqdn>@NFS-REALM.LOCAL' works as the document.


any guide please, thanks a lot.

Best Regards
Wang Yugui (wangyugui@e16-tech.com)
2023/01/22

Re: any guide to install/test nfs sec=krb5?

[Wang Yugui]

Hi,

> Is there any guide to install/test nfs sec=krb5?

A better document:
https://www.delltechnologies.com/asset/en-us/products/storage/industry-market/h17769_integrating_onefs_with_kerberos_wp.pdf
3.1.2 Configurations for Kerberized NFS with AD

we just directly add nfs/ SPN in 'Figure 5 Check SPNs in AD'.
and we no longer need ''ktpass.exe -mapUse'  in another document:
http://doc.isilon.com/ECS/3.3/AdminGuide/ecs_t_file_access_confgure_kerberos.html
http://doc.isilon.com/ECS/3.7/AdminGuide/GUID-2018CF69-5F1E-4F3A-BA90-3659F85DE415.html

and then 'mount.nfs4 -o sec=krb5' works in rocky linux 9.1.

Best Regards
Wang Yugui (wangyugui@e16-tech.com)
2023/01/23

> test env:
> krb5 server : windows  active directory
> linux: rocky linux 9.1,  already 'realm join' with sssd.
> 
> 1) from redhat
> https://access.redhat.com/documentation/en-us/red_hat_enterprise_linux/9/html/configuring_and_using_network_file_services/securing-nfs_configuring-and-using-network-file-services
> Procedure
> Create the nfs/hostname.domain@REALM principal on the NFS server side.
> Create the host/hostname.domain@REALM principal on both the server and the client side.
> Add the corresponding keys to keytabs for the client and server.
> 
> but we need more detail.
> 
> 
> 2, from isilon
> http://doc.isilon.com/ECS/3.3/AdminGuide/ecs_t_file_access_confgure_kerberos.html
> http://doc.isilon.com/ECS/3.7/AdminGuide/GUID-2018CF69-5F1E-4F3A-BA90-3659F85DE415.html
> more detail than redhat.
> 
> but the following fail.
> Test registration by running.
> kinit -k host/<fqdn>@NFS-REALM.LOCAL
> 
> host/<fqdn> will is already created when 'realm join'?
> host/<fqdn> is created here again, so there is some trouble?
> 
> 'kinit -k nfs/<fqdn>@NFS-REALM.LOCAL' works as the document.
> 
> 
> any guide please, thanks a lot.
> 
> Best Regards
> Wang Yugui (wangyugui@e16-tech.com)
> 2023/01/22
> 

Re: any guide to install/test nfs sec=krb5?

[Wang Yugui]

Hi,

> Hi,
> 
> > Is there any guide to install/test nfs sec=krb5?
> 
> A better document:
> https://www.delltechnologies.com/asset/en-us/products/storage/industry-market/h17769_integrating_onefs_with_kerberos_wp.pdf
> 3.1.2 Configurations for Kerberized NFS with AD
> 
> we just directly add nfs/ SPN in 'Figure 5 Check SPNs in AD'.
> and we no longer need ''ktpass.exe -mapUse'  in another document:
> http://doc.isilon.com/ECS/3.3/AdminGuide/ecs_t_file_access_confgure_kerberos.html
> http://doc.isilon.com/ECS/3.7/AdminGuide/GUID-2018CF69-5F1E-4F3A-BA90-3659F85DE415.html
> 
> and then 'mount.nfs4 -o sec=krb5' works in rocky linux 9.1.

I test more case with different nfs server / nfs client version.

SPN host/
	'realm join' auto create
SPN nfs/
	setspn.exe -S nfs/T3610 T3610; 	setspn.exe -S nfs/T3610.e16-tech.com T3610

'kinit -k  nfs/t3610.e16-tech.com@E16-TECH.COM' no need to work
'kinit -k host/t3610.e16-tech.com@E16-TECH.COM' no need to work.

el9: rocky linux 9.1
el8: oracle linux 8.6
el7: centos 7.9

nfs-server/el9   nfs-client OK/el7, *1/el8, OK/el9
nfs-server/el8   nfs-client OK/el7, *1/el8, *1/*2/el9
nfs-server/el7   nfs-client OK/el7, OK/el8, *1/*2/el9
   *1 Permission denied
   *2 Invalid argument     # when kernel 5.15 in nfs-server, kerenl 6.1 in nfs-client

nfs-utils version:  1.3.0/el7, 2.3.3/el8, 2.5.4/el9
kernel: same 5.15.y/6.1.y on el9/el8/el7

Best Regards
Wang Yugui (wangyugui@e16-tech.com)
2023/01/23

> Best Regards
> Wang Yugui (wangyugui@e16-tech.com)
> 2023/01/23
> 
> > test env:
> > krb5 server : windows  active directory
> > linux: rocky linux 9.1,  already 'realm join' with sssd.
> > 
> > 1) from redhat
> > https://access.redhat.com/documentation/en-us/red_hat_enterprise_linux/9/html/configuring_and_using_network_file_services/securing-nfs_configuring-and-using-network-file-services
> > Procedure
> > Create the nfs/hostname.domain@REALM principal on the NFS server side.
> > Create the host/hostname.domain@REALM principal on both the server and the client side.
> > Add the corresponding keys to keytabs for the client and server.
> > 
> > but we need more detail.
> > 
> > 
> > 2, from isilon
> > http://doc.isilon.com/ECS/3.3/AdminGuide/ecs_t_file_access_confgure_kerberos.html
> > http://doc.isilon.com/ECS/3.7/AdminGuide/GUID-2018CF69-5F1E-4F3A-BA90-3659F85DE415.html
> > more detail than redhat.
> > 
> > but the following fail.
> > Test registration by running.
> > kinit -k host/<fqdn>@NFS-REALM.LOCAL
> > 
> > host/<fqdn> will is already created when 'realm join'?
> > host/<fqdn> is created here again, so there is some trouble?
> > 
> > 'kinit -k nfs/<fqdn>@NFS-REALM.LOCAL' works as the document.
> > 
> > 
> > any guide please, thanks a lot.
> > 
> > Best Regards
> > Wang Yugui (wangyugui@e16-tech.com)
> > 2023/01/22
> > 
> 

Re: any guide to install/test nfs sec=krb5?

[Wang Yugui]

Hi,

> Hi,
> 
> > Hi,
> > 
> > > Is there any guide to install/test nfs sec=krb5?
> > 
> > A better document:
> > https://www.delltechnologies.com/asset/en-us/products/storage/industry-market/h17769_integrating_onefs_with_kerberos_wp.pdf
> > 3.1.2 Configurations for Kerberized NFS with AD
> > 
> > we just directly add nfs/ SPN in 'Figure 5 Check SPNs in AD'.
> > and we no longer need ''ktpass.exe -mapUse'  in another document:
> > http://doc.isilon.com/ECS/3.3/AdminGuide/ecs_t_file_access_confgure_kerberos.html
> > http://doc.isilon.com/ECS/3.7/AdminGuide/GUID-2018CF69-5F1E-4F3A-BA90-3659F85DE415.html
> > 
> > and then 'mount.nfs4 -o sec=krb5' works in rocky linux 9.1.
> 
> I test more case with different nfs server / nfs client version.
> 
> SPN host/
> 	'realm join' auto create
> SPN nfs/
> 	setspn.exe -S nfs/T3610 T3610; 	setspn.exe -S nfs/T3610.e16-tech.com T3610
> 
> 'kinit -k  nfs/t3610.e16-tech.com@E16-TECH.COM' no need to work
> 'kinit -k host/t3610.e16-tech.com@E16-TECH.COM' no need to work.
> 
> el9: rocky linux 9.1
> el8: oracle linux 8.6
> el7: centos 7.9
> 
> nfs-server/el9   nfs-client OK/el7, *1/el8, OK/el9
> nfs-server/el8   nfs-client OK/el7, *1/el8, *1/*2/el9
> nfs-server/el7   nfs-client OK/el7, OK/el8, *1/*2/el9
>    *1 Permission denied

sssd-ad/winbind-ad do not need rDNS.
but for nfs sec=krb5, we need rDNS to work.

here there is not only cables that connect to the switch, but also some cables 
that directly connect to another server.

>    *2 Invalid argument     # when kernel 5.15 in nfs-server, kerenl 6.1 in nfs-client

rpc-gssd.service maybe NOT running.

we need 'systemctl enable --now nfs-client.target'
#vendor preset: disabled@el9, enabled@el7/el8

Now sec=krb5 works well here.

Best Regards
Wang Yugui (wangyugui@e16-tech.com)
2023/01/23

> 
> nfs-utils version:  1.3.0/el7, 2.3.3/el8, 2.5.4/el9
> kernel: same 5.15.y/6.1.y on el9/el8/el7
> 
> Best Regards
> Wang Yugui (wangyugui@e16-tech.com)
> 2023/01/23