[CentOS] Samba and iptables - woes
Rob Kampen
rkampen at kampensonline.com
Tue Mar 31 15:56:00 UTC 2009
Tom wrote:
> What is the subnet mask of the outside interface?
>
255.255.255.0 or /24
> What is the subnet mask of the inside interface?
>
255.255.255 or /24
> I'm not real good with iptables but you might need to check your source
> address. Ex. 192.168.230.100/24. /24 is a full class C.
>
tried changing it to 192.168.230.0/24 as suggested by another, no
difference still does not work; as I suspected the last octet can be any
value it is effectively masked by the /24.
>
> -----Original Message-----
> From: centos-bounces at centos.org [mailto:centos-bounces at centos.org] On Behalf
> Of Rob Kampen
> Sent: Monday, March 30, 2009 9:19 PM
> To: CentOS mailing list
> Subject: [CentOS] Samba and iptables - woes
>
> Hi folk,
> I am trying to get iptables working on a samba server but find it is
> blocking something that prevents the windoze clients from being able to
> access the share.
> here are the bits from iptables:
>
>> # nmb provided netbios-ns
>> -A RH-Firewall-1-INPUT -p udp -m udp -s 192.168.230.100/24 -i eth1
>> --dport 137 -j ACCEPT # nmb provided netbios-dgm -A
>> RH-Firewall-1-INPUT -p udp -m udp -s 192.168.230.100/24 -i eth1
>> --dport 138 -j ACCEPT # Samba -A RH-Firewall-1-INPUT -p tcp -m tcp -m
>> state -s 192.168.230.100/24 -i
>> eth1 --dport 135 --state NEW -j ACCEPT # smb provided netbios-ssn -A
>> RH-Firewall-1-INPUT -p tcp -m tcp -m state -s 192.168.230.100/24 -i
>> eth1 --dport 139 --state NEW -j ACCEPT # smb provided microsoft-ds -A
>> RH-Firewall-1-INPUT -p tcp -m tcp -m state -s 192.168.230.100/24 -i
>> eth1 --dport 445 --state NEW -j ACCEPT
>>
> so as far as I can tell this should provide access to the required services.
> BTW the server has two NICs; 100Mb is eth0 at 192.168.230.230 and connects
> to the router with internet/NAT firewall; 1Gb is eth1 at
> 192.168.230.232 and this connects to a G ethernet switch that has the
> windoze clients.
> The smb.conf is as follows:
> [global]
> workgroup = NDG
> netbios name = SAMBA
> netbios aliases = Samba
> server string = Samba Server Version %v
> interfaces = lo, eth1, 192.168.230.232
> bind interfaces only = Yes
> security = DOMAIN
> obey pam restrictions = Yes
> passdb backend = tdbsam
> pam password change = Yes
> log file = /var/log/samba/%m.log
> max log size = 50
> load printers = No
> add user script = /usr/sbin/useradd "%u" -n -g users
> delete user script = /usr/sbin/userdel "%u"
> add group script = /usr/sbin/groupadd "%g"
> delete group script = /usr/sbin/groupdel "%g"
> delete user from group script = /usr/sbin/userdel "%u" "%g"
> add machine script = /usr/sbin/useradd -n -c "Workstation (%u)"
> -M -d /nohome -s /bin/false "%u"
> logon path =
> domain logons = Yes
> os level = 32
> preferred master = Yes
> domain master = Yes
> dns proxy = No
> wins support = Yes
> ldap ssl = no
> create mask = 0664
> directory mask = 0775
> hosts allow = 127., 192.168.230., 192.168.231.
> case sensitive = Yes
> browseable = No
> available = No
> wide links = No
> dont descend = /
>
> [homes]
> comment = Home Directories
> valid users = %S
> read only = No
> browseable = Yes
> available = Yes
>
> [NDG]
> comment = NDG files
> path = /NDG
> write list = @NDGstaff, @birdseye
> read only = No
> browseable = Yes
> available = Yes
>
> I found that making the rule for port 139 ignore the eth port (i.e.
> remove the -i eth1) allowed things to work better, but do not want this to
> be the case as I do not want the eth0 interface to be used for this traffic.
> looking at netstat -l -n shows only lo and eth1 listening on port 139, so
> how is this failing to work??
> Any ideas?
> Thanks
> Rob
>
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