diff --git a/letsencrypt/hooks/dc-pre-run b/letsencrypt/hooks/dc-pre-run
index 2af5330..7721754 100755
--- a/letsencrypt/hooks/dc-pre-run
+++ b/letsencrypt/hooks/dc-pre-run
@@ -10,6 +10,13 @@
 ## - SERVICE_DATASTORE           Location on host of the DATASTORE of this service
 ## - SERVICE_CONFIGSTORE         Location on host of the CONFIGSTORE of this service
 
+aimport remainder_args
+case "${remainder_args[@]:0:2}" in
+    "crt info"|"crt list")
+        exit 0
+        ;;
+esac
+
 . lib/common || exit 1
 
 set -e
@@ -46,26 +53,20 @@ if environment_def="$(printf "%s" "$service_def" | shyaml -y get-value options.e
     config+=$(echo -en "\n    LEXICON_PROVIDER: $provider")
 fi
 
-
-
 if ! challenge_type=$(printf "%s" "$service_def" | shyaml get-value "options.challenge-type" 2>/dev/null); then
     warn "No ${WHITE}challenge-type${NORMAL} provided, defaulting to 'http'."
     challenge_type=http
 fi
 config+=$(echo -en "\n    CHALLENGE_TYPE: $challenge_type")
 
-
-aimport remainder_args
-if [ "$challenge_type" == "http" ] &&
-       [ "${remainder_args[0]}" == "crt" ] &&
-       [ "${remainder_args[1]}" == "create" ] &&
-       ! [ -d "$SERVICE_DATASTORE/etc/letsencrypt/live/${remainder_args[2]}" ]; then
+if will_need_http_access ;then
     while read container_id; do
+        info "Attempting to clear port 80 by stopping $container_id"
         docker stop -t 5 "$container_id"
     done < <(docker ps \
-                 --filter label="compose.project=$PROJECT_NAME" \
-                 --filter publish=80 \
-                 --format "{{.ID}}"
+                    --filter label="compose.project=$PROJECT_NAME" \
+                    --filter publish=80 \
+                    --format "{{.ID}}"
             )
     config+=$(echo -en "\n  ports:
     - \"0.0.0.0:80:80\"")
diff --git a/letsencrypt/lib/common b/letsencrypt/lib/common
index 772777f..2a01777 100644
--- a/letsencrypt/lib/common
+++ b/letsencrypt/lib/common
@@ -1,6 +1,4 @@
-
-
-
+# -*- mode: shell-script -*-
 
 yaml_opt_bash_env() {
     local prefix="$1" key value
@@ -14,6 +12,7 @@ yaml_opt_bash_env() {
     done < <(shyaml key-values-0)
 }
 
+
 yaml_opt_bash_env_ignore_first_level() {
     local prefix="$1" key value
     while read-0 key value; do
@@ -23,3 +22,23 @@ yaml_opt_bash_env_ignore_first_level() {
         fi
     done < <(shyaml key-values-0)
 }
+
+
+will_need_http_access() {
+    local domains args_domains
+    [ "$challenge_type" == "http" ] || return 1
+    [ "${remainder_args[0]}" == "crt" ] || return 1
+    [ "${remainder_args[1]}" == "create" ] || return 1
+
+    [ -d "$SERVICE_DATASTORE/etc/letsencrypt/live/${remainder_args[2]}" ] || return 0
+
+    info "Querying ${remainder_args[2]} for previous info..."
+    out=$(compose run --rm letsencrypt crt info "${remainder_args[2]}" 2>&1 >/dev/null) || return 0
+    domains=$(printf "%s" "$out" | shyaml get-value domains) || return 0
+
+    domains=$(printf "%s " $domains | tr " " "\n" | sort)
+    args_domains=$(printf "%s " ${remainder_args[*]:2} | tr " " "\n" | sort)
+    info domains: "$domains"
+    info args_domain: "$args_domains"
+    [ "$domains" != "$args_domains" ]
+}
\ No newline at end of file