I can't connect to file shares on Windows computers using smbclient -L //hostname when the firewall is enabled.

This occurs whether I'm using ufw (which allows outgoing traffic and replies back in with the default configuration) or iptables (where I'm allowing outgoing traffic and replies back in with iptables -A INPUT -m state --state ESTABLISHED,RELATED -j ACCEPT).

However, smbclient -L //ip-address works whether the firewall is enabled or not.

I also tested this against a Samba server running on Ubuntu and again smbclient -L //hostname does not work when the firewall is enabled, but smbclient -L //ip-address works whether the firewall is enabled or not.

For reference, here are the iptables rules I used during testing:

*filter
:INPUT DROP [0:0]
:FORWARD ACCEPT [0:0]
:OUTPUT ACCEPT [0:0]
-A INPUT -m state --state RELATED,ESTABLISHED -j ACCEPT 
-A INPUT -p icmp -j ACCEPT 
-A INPUT -d 224.0.0.251/32 -p udp -m udp --dport 5353 -j ACCEPT 
COMMIT