The easiest way is to make sure your server settings and client settings are correctly configured.
Please check your login.cfg in your Ultima Online installation directory so that it resembles this.
;Loginservers for Ultima Online
;Do not edit this file or patching will fail! Always save a backup.
;LoginServer=login.owo.com,7775
;LoginServer=login.owo.com,7776
;PLEASE NOTE THAT 192.168.1.100 IS AN EXAMPLE OF YOUR IP!
LoginServer=192.168.1.100,2593
Now, after you've checked your Client's login configuration, please check your wolfpack.xml file in your Wolfpack director so that it resembles this.
<group name="LoginServer" >
<option key="Shard 1" value="My World=192.168.1.100,2592" />
</group>
<group name="Network" >
<option key="Allow Stat Request" value="true" />
<option key="Allow Unencrypted Clients" value="true" />
<option key="Enable Gameserver" value="true" />
<option key="Enable Loginserver" value="true" />
<option key="Gameserver Port" value="2592" />
<option key="Loginserver Port" value="2593" />
</group>
We support the encryption for the latest clients, so using programs like UOGateway, Ignition, UORice, etc. is completely optional and not required.