Iptables – Samba server NETBIOS name not resolving, WINS support not working

When I try to connect to my CentOS 6.2 x86_64 server's samba shares using address \\REPO (NETBIOS name of REPO), it times out and shows an error; if I do so directly via IP, it works fine. Furthermore, my server does not work correctly as a WINS server despite my samba settings being correct for it (see below for details).

If I stop the iptables service, things work properly.

I'm using this page as a reference for which ports to use: http://www.samba.org/samba/docs/server_security.html

Specifically:

UDP/137    - used by nmbd
UDP/138    - used by nmbd
TCP/139    - used by smbd
TCP/445    - used by smbd

I really really really want to keep the secure iptables design I have below but just fix this particular problem.

SMB.CONF

[global]
netbios name = REPO
workgroup = AWESOME

security = user
encrypt passwords = yes

# Use the native linux password database
#passdb backend = tdbsam

# Be a WINS server
wins support = yes

# Make this server a master browser
local master = yes
preferred master = yes
os level = 65

# Disable print support
load printers = no
printing = bsd
printcap name = /dev/null
disable spoolss = yes

# Restrict who can access the shares
hosts allow = 127.0.0. 10.1.1.




[public]
path = /mnt/repo/public
create mode = 0640
directory mode = 0750
writable = yes
valid users = mangs repoman

IPTABLES CONFIGURE SCRIPT

# Remove all existing rules
iptables -F


# Set default chain policies
iptables -P INPUT DROP
iptables -P FORWARD DROP
iptables -P OUTPUT DROP


# Allow incoming SSH
iptables -A INPUT -i eth0 -p tcp --dport 22222 -m state --state NEW,ESTABLISHED -j ACCEPT
iptables -A OUTPUT -o eth0 -p tcp --sport 22222 -m state --state ESTABLISHED -j ACCEPT


# Allow incoming HTTP
#iptables -A INPUT -i eth0 -p tcp --dport 80 -m state --state NEW,ESTABLISHED -j ACCEPT
#iptables -A OUTPUT -o eth0 -p tcp --sport 80 -m state --state ESTABLISHED -j ACCEPT


# Allow incoming Samba
iptables -A INPUT -i eth0 -p udp --dport 137 -m state --state NEW,ESTABLISHED -j ACCEPT
iptables -A OUTPUT -o eth0 -p udp --sport 137 -m state --state ESTABLISHED -j ACCEPT
iptables -A INPUT -i eth0 -p udp --dport 138 -m state --state NEW,ESTABLISHED -j ACCEPT
iptables -A OUTPUT -o eth0 -p udp --sport 138 -m state --state ESTABLISHED -j ACCEPT
iptables -A INPUT -i eth0 -p tcp --dport 139 -m state --state NEW,ESTABLISHED -j ACCEPT
iptables -A OUTPUT -o eth0 -p tcp --sport 139 -m state --state ESTABLISHED -j ACCEPT
iptables -A INPUT -i eth0 -p tcp --dport 445 -m state --state NEW,ESTABLISHED -j ACCEPT
iptables -A OUTPUT -o eth0 -p tcp --sport 445 -m state --state ESTABLISHED -j ACCEPT


# Make these rules permanent
service iptables save
service iptables restart**strong text**