[CentOS] firewall setup for nfs

lists at btito.net lists at btito.net
Tue Aug 4 14:29:17 UTC 2009


Hi, 

you also need to add portmapper ( port 110 ) and lock the following ports
preventing portmapper to assign random ports

Uncomment the following in /etc/sysconfig/nfs and make sure the portmapper
is restarted.

RQUOTAD_PORT=875
LOCKD_TCPPORT=32803
LOCKD_UDPPORT=32769
MOUNTD_PORT=892
STATD_PORT=662

Choose ports as you like and add them in the firewall.

Met vriendelijke groet / With kind regards,
Bob Tito


Op 04-08-09 16:23, Jerry Geis <geisj at pagestation.com> schreef:

> Below is my firewall rules for iptables.
> everything is working fine except for NFS
> I cannot mount my drive.
> 
> If I turn off iptables I can mount.
> 
> Looking at this :
> http://www.centos.org/docs/5/html/Deployment_Guide-en-US/ch-nfs.html
> Important
>  In order for NFS to work with a default installation of Red Hat Enterprise
> Linux with a firewall enabled, IPTables with the default TCP port 2049 must be
> configured. Without proper IPTables configuration, NFS does not function
> properly. 
> 
>  The NFS initialization script and rpc.nfsd process now allow binding to any
> specified port during system start up. However, this can be error prone if the
> port is unavailable or conflicts with another daemon.
> 
> I have port 2049 listed in my iptables.
> 
> Is there a reason I cannot mount?
> thanks,
> 
> Jerry
> 
> ------------------------------
> 
> 
> # Firewall configuration written by system-config-securitylevel
> # Manual customization of this file is not recommended.
> *filter
> :INPUT ACCEPT [0:0]
> :FORWARD ACCEPT [0:0]
> :OUTPUT ACCEPT [0:0]
> :RH-Firewall-1-INPUT - [0:0]
> -A INPUT -j RH-Firewall-1-INPUT
> -A FORWARD -j RH-Firewall-1-INPUT
> -A RH-Firewall-1-INPUT -i lo -j ACCEPT
> -A RH-Firewall-1-INPUT -i lo -j ACCEPT
> -A RH-Firewall-1-INPUT -p icmp --icmp-type any -j ACCEPT
> -A RH-Firewall-1-INPUT -p 50 -j ACCEPT
> -A RH-Firewall-1-INPUT -p 51 -j ACCEPT
> -A RH-Firewall-1-INPUT -p udp --dport 5353 -d 224.0.0.251 -j ACCEPT
> -A RH-Firewall-1-INPUT -p udp -m udp --dport 631 -j ACCEPT
> -A RH-Firewall-1-INPUT -p tcp -m tcp --dport 631 -j ACCEPT
> -A RH-Firewall-1-INPUT -m state --state ESTABLISHED,RELATED -j ACCEPT
> -A RH-Firewall-1-INPUT -m state --state NEW -m tcp -p tcp --dport 22 -j ACCEPT
> -A RH-Firewall-1-INPUT -m state --state NEW -m tcp -p tcp --dport 2049 -j
> ACCEPT
> -A RH-Firewall-1-INPUT -m state --state NEW -m udp -p udp --dport 2049 -j
> ACCEPT
> -A RH-Firewall-1-INPUT -m state --state NEW -m tcp -p tcp --dport 69 -j ACCEPT
> -A RH-Firewall-1-INPUT -m state --state NEW -m udp -p udp --dport 69 -j ACCEPT
> -A RH-Firewall-1-INPUT -m state --state NEW -m tcp -p tcp --dport 6540 -j
> ACCEPT
> -A RH-Firewall-1-INPUT -m state --state NEW -m tcp -p tcp --dport 6500 -j
> ACCEPT
> -A RH-Firewall-1-INPUT -m state --state NEW -m tcp -p tcp --dport 6510 -j
> ACCEPT
> -A RH-Firewall-1-INPUT -m state --state NEW -m tcp -p tcp --dport 6520 -j
> ACCEPT
> -A RH-Firewall-1-INPUT -m state --state NEW -m udp -p udp --dport 5060 -j
> ACCEPT
> -A RH-Firewall-1-INPUT -m state --state NEW -m udp -p udp --dport 5036 -j
> ACCEPT
> -A RH-Firewall-1-INPUT -m state --state NEW -m udp -p udp --dport 4569 -j
> ACCEPT
> -A RH-Firewall-1-INPUT -m state --state NEW -m udp -p udp --dport 1720 -j
> ACCEPT
> -A RH-Firewall-1-INPUT -m state --state NEW -m udp -p udp --dport 4520 -j
> ACCEPT
> -A RH-Firewall-1-INPUT -m state --state NEW -m tcp -p tcp --dport 80 -j ACCEPT
> -A RH-Firewall-1-INPUT -m state --state NEW -m tcp -p tcp --dport 443 -j
> ACCEPT
> -A RH-Firewall-1-INPUT -m state --state NEW -m udp -p udp --dport 123 -j
> ACCEPT
> -A RH-Firewall-1-INPUT -m state --state NEW -m tcp -p tcp --dport 53 -j ACCEPT
> -A RH-Firewall-1-INPUT -m state --state NEW -m tcp -p tcp --dport 5900 -j
> ACCEPT
> -A RH-Firewall-1-INPUT -m state --state NEW -m udp -p udp --dport 5900 -j
> ACCEPT
> -A RH-Firewall-1-INPUT -m state --state NEW -m tcp -p tcp --dport 2000 -j
> ACCEPT
> -A RH-Firewall-1-INPUT -m state --state NEW -m udp -p udp --dport 2000 -j
> ACCEPT
> -A RH-Firewall-1-INPUT -m state --state NEW -m udp -p udp --dport 5353 -j
> ACCEPT
> -A RH-Firewall-1-INPUT -m state --state NEW -m tcp -p tcp --dport 5353 -j
> ACCEPT
> -A RH-Firewall-1-INPUT -m state --state NEW -m tcp -p tcp --dport 6544 -j
> ACCEPT
> -A RH-Firewall-1-INPUT -j REJECT --reject-with icmp-host-prohibited
> 
> 
> 
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