diff --git a/backend/src/services/acme-cloudflare.ts b/backend/src/services/acme-cloudflare.ts
index 2ea0ba0..5aab41d 100644
--- a/backend/src/services/acme-cloudflare.ts
+++ b/backend/src/services/acme-cloudflare.ts
@@ -1,4 +1,3 @@
-import { createHash } from "node:crypto"
 import * as acme from "acme-client"
 import type { Server } from "../db/schema.js"
 import {
@@ -38,7 +37,6 @@ export async function testCloudflareToken(token: string): Promise<void> {
 }
 
 async function resolveZoneId(token: string, domain: string, defaultZoneId?: string): Promise<string> {
-  if (defaultZoneId?.trim()) return defaultZoneId.trim()
   const labels = domain.split(".").filter(Boolean)
   for (let i = 0; i < labels.length - 1; i++) {
     const guess = labels.slice(i).join(".")
@@ -48,6 +46,7 @@ async function resolveZoneId(token: string, domain: string, defaultZoneId?: stri
     )
     if (zones[0]?.id) return zones[0].id
   }
+  if (defaultZoneId?.trim()) return defaultZoneId.trim()
   throw new Error(`Не удалось определить зону Cloudflare для ${domain}`)
 }
 
@@ -73,10 +72,6 @@ async function deleteTxtRecord(token: string, zoneId: string, recordId: string):
   await cloudflareRequest(token, `/zones/${zoneId}/dns_records/${recordId}`, { method: "DELETE" })
 }
 
-function dns01Digest(keyAuthorization: string): string {
-  return createHash("sha256").update(keyAuthorization).digest("base64url")
-}
-
 async function sleep(ms: number) {
   await new Promise((resolve) => setTimeout(resolve, ms))
 }
@@ -89,6 +84,15 @@ async function getOrCreateAccountKey(): Promise<Buffer> {
   return key
 }
 
+async function ensureAcmeAccount(client: acme.Client): Promise<void> {
+  try {
+    client.getAccountUrl()
+    return
+  } catch {
+    await client.createAccount({ termsOfServiceAgreed: true })
+  }
+}
+
 export async function issueCertificateWithCloudflareDns(params: {
   server: Server
   certName: string
@@ -110,6 +114,7 @@ export async function issueCertificateWithCloudflareDns(params: {
     directoryUrl: settings.directoryUrl,
     accountKey,
   })
+  await ensureAcmeAccount(client)
 
   const altNames = domains.slice(1)
   const privateKey = params.keyType === "ec256"
@@ -129,11 +134,10 @@ export async function issueCertificateWithCloudflareDns(params: {
     for (const authz of authorizations) {
       const challenge = authz.challenges.find((c) => c.type === "dns-01")
       if (!challenge) throw new Error(`Нет DNS-01 challenge для ${authz.identifier.value}`)
-      const keyAuthorization = await client.getChallengeKeyAuthorization(challenge)
-      const digest = dns01Digest(keyAuthorization)
+      const txtValue = await client.getChallengeKeyAuthorization(challenge)
       const zoneId = await resolveZoneId(token, authz.identifier.value, settings.defaultZoneId)
       const recordName = `_acme-challenge.${authz.identifier.value}`
-      const recordId = await createTxtRecord(token, zoneId, recordName, digest)
+      const recordId = await createTxtRecord(token, zoneId, recordName, txtValue)
       txtCleanups.push({ zoneId, recordId })
     }
 
@@ -156,16 +160,16 @@ export async function issueCertificateWithCloudflareDns(params: {
     const safeBase = params.certName.replace(/[^a-zA-Z0-9._-]+/g, "_")
     const certFile = `${safeBase}.crt`
     const keyFile = `${safeBase}.key`
-    await clientRos.uploadTextFile(certFile, certPem)
-    await clientRos.uploadTextFile(keyFile, privateKey.toString("utf8"))
+    const certRouterFile = await clientRos.uploadTextFile(certFile, certPem)
+    const keyRouterFile = await clientRos.uploadTextFile(keyFile, privateKey.toString("utf8"))
     await clientRos.importCertificate({
-      fileName: certFile,
+      fileName: certRouterFile,
       name: params.certName,
       trusted: true,
       trustStore: params.trustStore.join(","),
     })
     await clientRos.importCertificate({
-      fileName: keyFile,
+      fileName: keyRouterFile,
       name: params.certName,
       trusted: true,
       trustStore: params.trustStore.join(","),
diff --git a/backend/src/services/mikrotik.ts b/backend/src/services/mikrotik.ts
index 9cfe357..6a69c4a 100644
--- a/backend/src/services/mikrotik.ts
+++ b/backend/src/services/mikrotik.ts
@@ -156,6 +156,62 @@ function rosPost(
   })
 }
 
+function rosPut(
+  params: MikrotikConnectParams,
+  path: string,
+  body: Record<string, string>,
+  timeoutMs: number,
+): Promise<unknown> {
+  return new Promise((resolve, reject) => {
+    const basePath = params.apiPath ?? "/rest"
+    const authHeader = "Basic " + Buffer.from(`${params.username}:${params.password}`).toString("base64")
+    const payload = JSON.stringify(body)
+
+    const options: https.RequestOptions = {
+      hostname: params.host,
+      port: params.port,
+      path: basePath + path,
+      method: "PUT",
+      headers: {
+        Authorization: authHeader,
+        "Content-Type": "application/json",
+        "Content-Length": Buffer.byteLength(payload),
+      },
+      rejectUnauthorized: params.useSsl ? params.verifySsl : undefined,
+    }
+
+    const lib = params.useSsl ? https : http
+    const timer = setTimeout(() => {
+      req.destroy(new Error(`Connection to ${params.host}:${params.port} timed out after ${timeoutMs / 1000}s`))
+    }, timeoutMs)
+
+    const req = lib.request(options, (res) => {
+      let buf = ""
+      res.setEncoding("utf8")
+      res.on("data", (chunk: string) => { buf += chunk })
+      res.on("end", () => {
+        clearTimeout(timer)
+        if (!res.statusCode || res.statusCode < 200 || res.statusCode >= 300) {
+          reject(new MikrotikError(res.statusCode ?? 0, path, buf))
+          return
+        }
+        try {
+          resolve(buf.trim() ? JSON.parse(buf) : {})
+        } catch {
+          reject(new Error(`Invalid JSON from RouterOS: ${buf.slice(0, 200)}`))
+        }
+      })
+    })
+
+    req.on("error", (err) => {
+      clearTimeout(timer)
+      reject(err)
+    })
+    req.write(payload)
+    req.end()
+  })
+}
+
 function rosDelete(
   params: MikrotikConnectParams,
   path: string,
@@ -270,6 +326,18 @@ function unwrapRestSingle<T extends object>(raw: unknown): T {
   throw new Error("RouterOS REST: неожиданное тело ответа")
 }
 
+function routerFileBasename(fileName: string): string {
+  return fileName.replace(/^\/+/, "").split("/").pop() ?? fileName
+}
+
+function matchesUploadedFile(entryName: string, requested: string): boolean {
+  const base = routerFileBasename(requested)
+  return entryName === requested
+    || entryName === base
+    || entryName === `flash/${base}`
+    || entryName.endsWith(`/${base}`)
+}
+
 // ── MikrotikClient ─────────────────────────────────────────────────────────────
 
 export class MikrotikClient {
@@ -295,6 +363,10 @@ export class MikrotikClient {
     return rosPost(this.params, path, body, timeoutMs, signal) as Promise<T>
   }
 
+  async put<T>(path: string, body: Record<string, string>, timeoutMs = 15_000): Promise<T> {
+    return rosPut(this.params, path, body, timeoutMs) as Promise<T>
+  }
+
   async delete(path: string, timeoutMs = 10_000): Promise<void> {
     return rosDelete(this.params, path, timeoutMs)
   }
@@ -437,8 +509,49 @@ export class MikrotikClient {
     return raw.filter((row): row is Record<string, string | undefined> => row != null && typeof row === "object")
   }
 
-  async uploadTextFile(fileName: string, contents: string, timeoutMs = 30_000): Promise<void> {
-    await this.post("/file", { name: fileName, contents }, timeoutMs)
+  async listFiles(): Promise<Array<{ name: string }>> {
+    const raw = await this.get<unknown>("/file")
+    if (!Array.isArray(raw)) return []
+    return raw
+      .filter((row): row is Record<string, unknown> => row != null && typeof row === "object")
+      .map((row) => ({ name: String(row.name ?? "") }))
+      .filter((row) => row.name.length > 0)
+  }
+
+  private async resolveUploadedFileName(requested: string): Promise<string> {
+    const files = await this.listFiles()
+    const match = files.find((file) => matchesUploadedFile(file.name, requested))
+    if (!match) {
+      throw new Error(`Файл ${routerFileBasename(requested)} не найден на RouterOS после загрузки`)
+    }
+    return match.name
+  }
+
+  async uploadTextFile(fileName: string, contents: string, timeoutMs = 30_000): Promise<string> {
+    const normalized = routerFileBasename(fileName)
+    const payload = contents.endsWith("\n") ? contents : `${contents}\n`
+    const candidates = [`flash/${normalized}`, normalized]
+    let lastError: unknown
+
+    for (const name of candidates) {
+      try {
+        await this.put("/file", { name, contents: payload }, timeoutMs)
+        return await this.resolveUploadedFileName(name)
+      } catch (error) {
+        lastError = error
+      }
+
+      try {
+        await this.post("/file/add", { name, contents: payload, type: "file" }, timeoutMs)
+        return await this.resolveUploadedFileName(name)
+      } catch (error) {
+        lastError = error
+      }
+    }
+
+    throw lastError instanceof Error
+      ? lastError
+      : new Error(`Не удалось загрузить файл ${normalized} на RouterOS`)
   }
 
   async importCertificate(params: {