Web Filtering: Merge multiple filter actions

Question

Hello everyone, 
 
 I searched the web and the community for this the whole morning, now I joined the community to see if someone can help me with my task. 
 
 We are using a transparent proxy, no SSO auth, just URL filtering. We blocked some pages that we do not want to be available in the office. At the moment, we only have one filter action with multiple settings. 
 What we want to do: we want to use this filter action for all our clients, but we want to add one additional rule for our terminal servers. To be specific: the users shall have the same restrictions when using their client or the terminal server, but in addition to that, we want to prevent that they use Skype WebApp on the server, so we want to block this site, too, only if the traffic is originating from this server. 
 
 I could not clone our default filter action and add the block to the Skype URL. But this would mean that everytime I adjust the main rule I would have to do this on the new rule, too. Is there any way to "merge" the usage of two filter actions? 
 
 For now I only found topics in the community stating that only one profile can be used at a time for one system. I am affraid it is the same with filter actions, but I thought i would give it a try... 
 
 I appreciate any help! 
 
 Thanks 
 
 Regards, 
 
 Tobias

Michael Dunn · Accepted Answer

FYI (and I know this is completely unhelpful) this is how the Sophos Web Appliance works - it is additive. 
 
 What about this: 
 Categories - First all realize that "Category" is often actually a group of categories, which can be managed. Go to Filtering Options, Categories, and create a new category called "My Blocked Categories" and put in all the categories you want to block. Now go to both of your filter actions, set My Blocked Categories to Block and leave everything else as Allow. Now if you ever want to block an additional category, add it to My Blocked Categories and it automatically updates both. 
 Websites - Do not use the "Block these Websites" and "Allow these websites". Instead create a tag "My Blocked Tags" and "My Allowed Tags" and in the Filter Action set them to Allow and Block. Now when you add websites to the tags, it automatically adds it to both Filter Actions. 
 Downloads - Unfortunately there is no global place where you can set an object and reuse it for file extensions and mime types. However there is on each of those lists an Import and Export, which allows you to manage the entire list as one cut&paste rather than each line individually. 
 Antivirus and Additional Options - No way to share or copy these. However once configured the almost never change. 
 After the first month and things have settled down, 95% of changes that need doing are with allowing and blocking individual sites, which can be done purely with tags and therefore apply to both filter actions. Which means, that all most people really need is to use tags in the Websites, they don't even need to mess with custom groups of categories.

Another option would be that if everything that is different can be done as a single Tag then whenever you make a change to your base, just clone it, update the clone with the tag, and then use the new clone. Basically if you make the it so there is a one-line-difference then it becomes easier to just re-clone and re-modify.