Slackware :: Dolphin Samba Share Firewall / Saying It Can't Find Any Workgroups On Local Network?

I just set up my firewall, and now I can't see any Samba workgroups. It says it can't find any workgroups on my local network, and it may be caused by a firewall. It is a firewall issue because if I disable my firewall, I can see the workgroup. What do I need to open on my firewall to see the workgroup? I am using Slackware64 13.37.

Here is how I set up my firewall.

Code:
iptables -P INPUT DROP
iptables -P FORWARD DROP
iptables -A INPUT -m state --state ESTABLISHED,RELATED -j ACCEPT
iptables -A INPUT -s 127.0.0.0/8 -d 127.0.0.0/8 -i lo -j ACCEPT
iptables -A INPUT -p icmp -j ACCEPT
I got the commands from here url.