IE 8 does not respect disabled CIDR field when editing host alias, leading to filter ruleset syntax errors
Even if we do not fix the front-end JS we should be ignoring the CIDR field entirely for a host type alias. The page could use some sanity checking to make sure the user can't save the alias with a bad mask. Even if the browser is braindead we shouldn't allow the invalid input.
How to repeat using IE 8:
Create a host alias, add one IP, save.
Edit the host alias, click + to add a new row
Help ticket #3449:
Improve data validation to avoid save a host/subnet or a IPv4 with
IE8,but this fix will prevent the same issue happening in the future on
a different browser.