On Thursday 18 February 2010 11:00:53 Rudi Ahlers wrote: > Hi all, > > Which ports do I need to have open on an NFS client's firewall to allow it > to connect to a remote NFS servers? > > When I disable iptables (using ConfigServerFirewall), it connects fine, but > as soon as I enable it, NFS gives me this error: > root at saturn:[~]$ mount master1.mydomain.co.za:/saturn /bck > mount: mount to NFS server 'master1.mydomain.co.za' failed: RPC Error: > Unable to send. > > I have added ports 111 & 2049 in both the TCP & UDP ingres & exgress > ranges, but that doesn't seem to help. portmap & nfs is running as well. > But as I say, as soon as I disable the firewall, it mounts fine. > > Google search results reveal a lot of different ports, like 4000:4004, > 83xxxx (something, I forgot) but it still doesn't help. > > > root at saturn:[~]$ rpcinfo -p > program vers proto port > 100000 2 tcp 111 portmapper > 100000 2 udp 111 portmapper > 100021 1 udp 48996 nlockmgr > 100021 3 udp 48996 nlockmgr > 100021 4 udp 48996 nlockmgr > 100021 1 tcp 47195 nlockmgr > 100021 3 tcp 47195 nlockmgr > 100021 4 tcp 47195 nlockmgr > 100011 1 udp 4004 rquotad > 100011 2 udp 4004 rquotad > 100011 1 tcp 4004 rquotad > 100011 2 tcp 4004 rquotad > 100003 2 udp 2049 nfs > 100003 3 udp 2049 nfs > 100003 4 udp 2049 nfs > 100003 2 tcp 2049 nfs > 100003 3 tcp 2049 nfs > 100003 4 tcp 2049 nfs > 100005 1 udp 4003 mountd > 100005 1 tcp 4003 mountd > 100005 2 udp 4003 mountd > 100005 2 tcp 4003 mountd > 100005 3 udp 4003 mountd > 100005 3 tcp 4003 mountd > Hi, NFS by default uses random high numbered ports. See "48996 nlockmgr" above. You need to tie them down to allow them through your firewall Create the following file /etc/sysconfig/nfs #/etc/sysconfig/nfs # Created 05.07.05 by Tony Molloy # Number of NFS threads to run RPCNFSDCOUNT=48 # ports for statd daemon STATD_PORT=4000 STATD_OUTGOING_PORT=4004 # ports for lockd daemon LOCKD_TCPPORT=4001 LOCKD_UDPPORT=4001 # ports for mountd daemon #MOUNTD_NFS_V2=no #MOUNTD_NFS_V3=no MOUNTD_PORT=4002 # ports for rquota daemon #RQUOTAD=no RQUOTAD_PORT=4003 Then open ports 4000:4004 in you firewall as well as port 111 the portmapper and port 2049 for NFS Hope this helps, Tony -- Chief Technical Officer. Tel: +353 061-202778 Dept. of Comp. Sci. University of Limerick.