http://wiki.mikrotik.com/wiki/Manual:IP/Firewall/Filter does not document the reject-with values any more.
https://www.google.com/search?q="reject-with"+mikrotik+site:wiki.mikrotik.com%2Fwiki%2FManual reveals one tiny example with one value not explaining what it means.
Please re-add the relevant bits of https://www.mikrotik.com/testdocs/ros/2.9/ip/filter.php again and explain the various values.
–jeroen
Values are self explanatory.
Do you wan to see something like
icmp-echo-reply - sends icmp echo reply
etc 
Just include the values in there, like other enumerated values (no explanation for each needed), i.e. have the first column as:
reject-with > (icmp-admin-prohibited | icmp-echo-reply | icmp-host-prohibited | icmp-host-unreachable | icmp-net-prohibited | icmp-network-unreachable | icmp-port-unreachable | icmp-protocol-unreachable | tcp-reset | > integer> ; Default: )
It saves people from going to terminal and typing “add reject-with=?” just to see the possible values they’re working with.
Personally, I’d also appreciate an explanation for the integer. I’m guessing it’s ICMP code, but it would be nice if this is explicitly said.
With the exception of “integer” (mentioned by Boen Robot) these response types are standard IP packet types. If you want to learn about those, then just google for any networking tutorials / guides / rfcs etc.
That’s the problem: https://www.google.com/search?q=“icmp-admin-prohibited” does not return meaningful results at least not in my location.
Why not just have the documentation link to a relevant URL that explains the values?
Don’t expect all your users to be RFC gurus.
–jeroen
Let me do that for you
http://lmgtfy.com/?q=icmp+admin+prohibited+code&l=1#seen
BTW there is no integer code in ROS v6.
Your post was not helpful, especially not in your role as Mikrotik Support employee. In that light I regard your post even as unprofessional especially since you insinuate I cannot search and your search results does not reveal any relevant standards explaining the information I was after.
After a long search, I found https://tools.ietf.org/html/rfc1812#section-5.2.7.1 which explains what the rejection code means and got there via https://tools.ietf.org/html/rfc5508#section-6 after observing that these RFCs call the flag “Communication administratively prohibited” which is not near a search for “icmp-admin-prohibited” or “icmp admin prohibited”.
I don’t expect you guys to be like companies such as Cisco in the extension of documentation, but I do expect linking to relevant documentation when you don’t explain the why/how of certain functionality especially if you name things differently from standards.
In this case you guys should link to these RFCs or similar kinds of information (maybe even through the WayBack machine if you expect 404-errors) as right now you put the search burden on your customers instead of helping them.
–jeroen
