what are the respective services for portmapper & nlockmgr in RHEl 7.

Latest response

Hi All,

Need help to know what are services related with portmapper & nlockmgr in RHEL7.
Need to stop nlockmge as a part of NFS rpc vulnerability in our environment.
Here are teh details of rpcinfo -p output:-
rpcinfo -p
program vers proto port service
100000 4 tcp 111 portmapper
100000 3 tcp 111 portmapper
100000 2 tcp 111 portmapper
100000 4 udp 111 portmapper
100000 3 udp 111 portmapper
100000 2 udp 111 portmapper
100024 1 udp 54495 status
100024 1 tcp 50640 status
100021 1 udp 32769 nlockmgr
100021 3 udp 32769 nlockmgr
100021 4 udp 32769 nlockmgr
100021 1 tcp 32803 nlockmgr
100021 3 tcp 32803 nlockmgr
100021 4 tcp 32803 nlockmgr

Thanks & Regards,
Abhishek
Unix Team

LT
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Responses

Radek Bíba's picture Red Hat Guru 1517 points
12 May 2015 8:46 AM

Hi Abhishek,

I believe you're looking for rpcbind (formerly portmapper) and rpc-statd (AKA nfs-lock).

Radek

LT Community Member 59 points
12 May 2015 11:06 AM

Hi Radek,I tried with rpcbind and rpc-statd service restart however still nlockmgr service is showing running on "rpcbind -p" command.Looking for the way the nlockmgr service does not show in "rpcbind -p" command.

LT Community Member 59 points
15 May 2015 6:32 PM

We are trying to stop nfs-lock service in all NFS client servers, And that is why we need your help to know the procedure here.

Radek Bíba's picture Red Hat Guru 1517 points
18 May 2015 11:55 AM

Hi Abhishek,

I've done some searching, and nlockmgr seems to be independent of the two services. Moreover, I couldn't find a way to prevent it from running. If you still want to use NFS but you don't want the nlockmgr service to be available, I suggest blocking it on the firewall level until a better solution is found.

Radek

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