diff --git a/src/admin/web/manage.ts b/src/admin/web/manage.ts
index a0adbdb..bdeab5d 100644
--- a/src/admin/web/manage.ts
+++ b/src/admin/web/manage.ts
@@ -314,10 +314,10 @@ router.post("/maintenance", (req, res) => {
       const temps = users.filter((u) => u.type === "temporary");
       temps.forEach((user) => {
         user.expiresAt = Date.now();
-        user.disabledReason = "Admin forced expiration."
+        user.disabledReason = "Admin forced expiration.";
         userStore.upsertUser(user);
       });
-      invalidatePowHmacKey()
+      invalidatePowHmacKey();
       flash.type = "success";
       flash.message = `${temps.length} temporary users marked for expiration.`;
       break;
@@ -370,8 +370,8 @@ router.post("/maintenance", (req, res) => {
               ipv4RangeMap.set(subnet, userSet);
             } else if (parsed.kind() === "ipv6") {
               const subnet =
-                parsed.toNormalizedString().split(":").slice(0, 3).join(":") +
-                "::/56";
+                parsed.toNormalizedString().split(":").slice(0, 4).join(":") +
+                "::/48";
               const userSet = ipv6RangeMap.get(subnet) || new Set<string>();
               userSet.add(u.token);
               ipv6RangeMap.set(subnet, userSet);
diff --git a/src/info-page.ts b/src/info-page.ts
index 9dc7862..443516b 100644
--- a/src/info-page.ts
+++ b/src/info-page.ts
@@ -158,7 +158,7 @@ function getSelfServiceLinks() {
     links.unshift(["Request a user token", "/user/captcha"]);
   }
 
-  return `<div class="self-service-links"">${links
+  return `<div class="self-service-links">${links
     .map(([text, link]) => `<a target="_blank" href="${link}">${text}</a>`)
     .join(" | ")}</div>`;
 }
diff --git a/src/shared/cidr.ts b/src/shared/cidr.ts
index 2674f5e..07d0463 100644
--- a/src/shared/cidr.ts
+++ b/src/shared/cidr.ts
@@ -24,9 +24,9 @@ export function parseCidrs(cidrs: string[] | string): [IPv4 | IPv6, number][] {
     .map((input) => {
       try {
         if (input.includes("/")) {
-          return ipaddr.parseCIDR(input);
+          return ipaddr.parseCIDR(input.trim());
         } else {
-          const ip = ipaddr.parse(input);
+          const ip = ipaddr.parse(input.trim());
           return ipaddr.parseCIDR(
             `${input}/${ip.kind() === "ipv4" ? 32 : 128}`
           );
@@ -44,23 +44,25 @@ export function createWhitelistMiddleware(
   base: string[] | string
 ) {
   let cidrs: string[] = [];
-  let matchers: [IPv4 | IPv6, number][] = [];
+  let ranges: Record<string, [IPv4 | IPv6, number][]> = {};
 
-  const middleware = (req: Request, res: Response, next: NextFunction) => {
+  const middleware: IpCheckMiddleware = (req, res, next) => {
     const ip = ipaddr.process(req.ip);
-    const allowed = matchers.some((cidr) => ip.match(cidr));
-    if (allowed) {
+    const match = ipaddr.subnetMatch(ip, ranges, "none");
+    if (match === name) {
       return next();
+    } else {
+      req.log.warn({ ip: req.ip, list: name }, "Request denied by whitelist");
+      res.status(403).json({ error: `Forbidden (by ${name})` });
     }
-    req.log.warn({ ip: req.ip, list: name }, "Request denied by whitelist");
-    res.status(403).json({ error: `Forbidden (by ${name})` });
   };
-  middleware.ranges = [] as string[];
-  middleware.updateRanges = (ranges: string[] | string) => {
-    cidrs = Array.isArray(ranges) ? ranges.slice() : [ranges];
-    matchers = parseCidrs(cidrs);
-    log.info({ list: name, matchers }, "IP whitelist configured");
+  middleware.ranges = cidrs;
+  middleware.updateRanges = (r: string[] | string) => {
+    cidrs = Array.isArray(r) ? r.slice() : [r];
+    const parsed = parseCidrs(cidrs);
+    ranges = { [name]: parsed };
     middleware.ranges = cidrs;
+    log.info({ list: name, ranges }, "IP whitelist configured");
   };
 
   middleware.updateRanges(base);
@@ -74,24 +76,27 @@ export function createBlacklistMiddleware(
   base: string[] | string
 ) {
   let cidrs: string[] = [];
-  let matchers: [IPv4 | IPv6, number][] = [];
+  let ranges: Record<string, [IPv4 | IPv6, number][]> = {};
 
-  const middleware = (req: Request, res: Response, next: NextFunction) => {
+  const middleware: IpCheckMiddleware = (req, res, next) => {
     const ip = ipaddr.process(req.ip);
-    const denied = matchers.some((cidr) => ip.match(cidr));
-    if (denied) {
+    const match = ipaddr.subnetMatch(ip, ranges, "none");
+    if (match === name) {
       req.log.warn({ ip: req.ip, list: name }, "Request denied by blacklist");
       return res.status(403).json({ error: `Forbidden (by ${name})` });
+    } else {
+      return next();
     }
-    return next();
   };
-  middleware.ranges = [] as string[];
-  middleware.updateRanges = (ranges: string[] | string) => {
-    cidrs = Array.isArray(ranges) ? ranges.slice() : [ranges];
-    matchers = parseCidrs(cidrs);
-    log.info({ list: name, matchers }, "IP blacklist configured");
+  middleware.ranges = cidrs;
+  middleware.updateRanges = (r: string[] | string) => {
+    cidrs = Array.isArray(r) ? r.slice() : [r];
+    const parsed = parseCidrs(cidrs);
+    ranges = { [name]: parsed };
     middleware.ranges = cidrs;
+    log.info({ list: name, ranges }, "IP blacklist configured");
   };
+
   middleware.updateRanges(base);
 
   blacklists.set(name, middleware);
diff --git a/src/shared/views/partials/shared_header.ejs b/src/shared/views/partials/shared_header.ejs
index 8a5b14e..93079f0 100644
--- a/src/shared/views/partials/shared_header.ejs
+++ b/src/shared/views/partials/shared_header.ejs
@@ -100,5 +100,3 @@
   <script nonce="" src="https://assets.evulid.cc/js/evulid-matomo.js"></script><noscript><p><img src="https://mato.evulid.cc/matomo.php?idsite=8&amp;rec=1" style="border:0" alt="" /></p></noscript></head>
   <body>
     <%- include("partials/shared_flash", { flashData: flash }) %>
-  </body>
-</html>
diff --git a/src/user/web/views/partials/user_challenge_widget.ejs b/src/user/web/views/partials/user_challenge_widget.ejs
index dd06f72..15f238b 100644
--- a/src/user/web/views/partials/user_challenge_widget.ejs
+++ b/src/user/web/views/partials/user_challenge_widget.ejs
@@ -335,7 +335,7 @@
     elapsedTime += (Date.now() - lastUpdateTime) / 1000;
     lastUpdateTime = Date.now();
     const hashRate = totalHashes / elapsedTime;
-    const expectedTimeRemaining = (workFactor - totalHashes) / hashRate;
+    const timeRemaining = (workFactor - totalHashes) / hashRate;
     const progress = 100 * (1 - Math.exp(-totalHashes / workFactor));
 
     const formatTime = (time) => {
@@ -362,11 +362,11 @@
 
     document.getElementById("captcha-progress").style.width = Math.min(progress, 100) + "%";
     document.getElementById("captcha-progress-text").value = `
-Average hashes needed: ${workFactor.toLocaleString()}
+Solution probability: 1 in ${workFactor.toLocaleString()} hashes
 Hashes computed: ${totalHashes.toLocaleString()}${note}
 Elapsed time: ${formatTime(elapsedTime)}
 Hash rate: ${hashRate.toFixed(2)} H/s
 Workers: ${workers.length}${isMobileWebkit ? " (iOS/iPadOS detected)" : ""}
-${active ? `Approx. time remaining: ${formatTime(expectedTimeRemaining)}` : "Verification task stopped"}`.trim();
+${active ? `Average time remaining: ${formatTime(timeRemaining)}` : "Verification task stopped"}`.trim();
   }
 </script>