Only allow specific URI through F5 for virtual server

It looks like this worked briefly, then stopped functioning after around 60 seconds. Now receiving connection resets again. Extremely strange behaviour from the F5.

iRule used: when HTTP_REQUEST { set uri [string tolower [HTTP::path]] switch -glob $uri {"/soa-infra/resources/ExternalEndpoint/*" { HTTP::uri "/uri" } default { reject } } }