diff --git a/package-lock.json b/package-lock.json
index 9556570..4f9e072 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -8,6 +8,7 @@
       "name": "@cloud-cli/dns",
       "version": "0.0.0",
       "dependencies": {
+        "@cloud-cli/cli": "^1.6.0",
         "@cloud-cli/exec": "^1.0.4"
       },
       "devDependencies": {
@@ -602,6 +603,17 @@
       "integrity": "sha512-0hYQ8SB4Db5zvZB4axdMHGwEaQjkZzFjQiN9LVYvIFB2nSUHW9tYpxWriPrWDASIxiaXax83REcLxuSdnGPZtw==",
       "dev": true
     },
+    "node_modules/@cloud-cli/cli": {
+      "version": "1.6.0",
+      "resolved": "https://registry.npmjs.org/@cloud-cli/cli/-/cli-1.6.0.tgz",
+      "integrity": "sha512-caPn+/VAOIfoh4Q5b90X2EveTR+p+Vv4EufCfLJxU5CkWfTxTqWosGXjaVigS4sELyP3hiOv4kB+ZbhCy/eDWw==",
+      "dependencies": {
+        "yargs": "^17.6.2"
+      },
+      "bin": {
+        "cy": "dist/run.js"
+      }
+    },
     "node_modules/@cloud-cli/exec": {
       "version": "1.0.4",
       "resolved": "https://registry.npmjs.org/@cloud-cli/exec/-/exec-1.0.4.tgz",
@@ -1179,7 +1191,6 @@
       "version": "5.0.1",
       "resolved": "https://registry.npmjs.org/ansi-regex/-/ansi-regex-5.0.1.tgz",
       "integrity": "sha512-quJQXlTSUGL2LH9SUXo8VwsY4soanhgo6LNSm84E1LBcE8s3O0wpdiRzyR9z/ZZJMlMWv37qOOb9pdJlMUEKFQ==",
-      "dev": true,
       "engines": {
         "node": ">=8"
       }
@@ -1188,7 +1199,6 @@
       "version": "4.3.0",
       "resolved": "https://registry.npmjs.org/ansi-styles/-/ansi-styles-4.3.0.tgz",
       "integrity": "sha512-zbB9rCJAT1rbjiVDb2hqKFHNYLxgtk8NURxZ3IZwD3F6NtxbXZQCnnSi1Lkx+IDohdPlFp222wVALIheZJQSEg==",
-      "dev": true,
       "dependencies": {
         "color-convert": "^2.0.1"
       },
@@ -1485,7 +1495,6 @@
       "version": "8.0.1",
       "resolved": "https://registry.npmjs.org/cliui/-/cliui-8.0.1.tgz",
       "integrity": "sha512-BSeNnyus75C4//NQ9gQt1/csTXyo/8Sb+afLAkzAptFuMsod9HFokGNudZpi/oQV73hnVK+sR+5PVRMd+Dr7YQ==",
-      "dev": true,
       "dependencies": {
         "string-width": "^4.2.0",
         "strip-ansi": "^6.0.1",
@@ -1515,7 +1524,6 @@
       "version": "2.0.1",
       "resolved": "https://registry.npmjs.org/color-convert/-/color-convert-2.0.1.tgz",
       "integrity": "sha512-RRECPsj7iu/xb5oKYcsFHSppFNnsj/52OVTRKb4zP5onXwVF3zVmmToNcOfGC+CRDpfK/U584fMg38ZHCaElKQ==",
-      "dev": true,
       "dependencies": {
         "color-name": "~1.1.4"
       },
@@ -1526,8 +1534,7 @@
     "node_modules/color-name": {
       "version": "1.1.4",
       "resolved": "https://registry.npmjs.org/color-name/-/color-name-1.1.4.tgz",
-      "integrity": "sha512-dOy+3AuW3a2wNbZHIuMZpTcgjGuLU/uBL/ubcZF9OXbDo8ff4O8yVp5Bf0efS8uEoYo5q4Fx7dY9OgQGXgAsQA==",
-      "dev": true
+      "integrity": "sha512-dOy+3AuW3a2wNbZHIuMZpTcgjGuLU/uBL/ubcZF9OXbDo8ff4O8yVp5Bf0efS8uEoYo5q4Fx7dY9OgQGXgAsQA=="
     },
     "node_modules/concat-map": {
       "version": "0.0.1",
@@ -1641,8 +1648,7 @@
     "node_modules/emoji-regex": {
       "version": "8.0.0",
       "resolved": "https://registry.npmjs.org/emoji-regex/-/emoji-regex-8.0.0.tgz",
-      "integrity": "sha512-MSjYzcWNOA0ewAHpz0MxpYFvwg6yjy1NG3xteoqz644VCo/RPgnr1/GGt+ic3iJTzQ8Eu3TdM14SawnVUmGE6A==",
-      "dev": true
+      "integrity": "sha512-MSjYzcWNOA0ewAHpz0MxpYFvwg6yjy1NG3xteoqz644VCo/RPgnr1/GGt+ic3iJTzQ8Eu3TdM14SawnVUmGE6A=="
     },
     "node_modules/error-ex": {
       "version": "1.3.2",
@@ -1657,7 +1663,6 @@
       "version": "3.1.1",
       "resolved": "https://registry.npmjs.org/escalade/-/escalade-3.1.1.tgz",
       "integrity": "sha512-k0er2gUkLf8O0zKJiAhmkTnJlTvINGv7ygDNPbeIsX/TJjGJZHuh9B2UxbsaEkmlEo9MfhrSzmhIlhRlI2GXnw==",
-      "dev": true,
       "engines": {
         "node": ">=6"
       }
@@ -1882,7 +1887,6 @@
       "version": "2.0.5",
       "resolved": "https://registry.npmjs.org/get-caller-file/-/get-caller-file-2.0.5.tgz",
       "integrity": "sha512-DyFP3BM/3YHTQOCUL/w0OZHR0lpKeGrxotcHWcqNEdnltqFwXVfhEBQ94eIo34AfQpo0rGki4cyIiftY06h2Fg==",
-      "dev": true,
       "engines": {
         "node": "6.* || 8.* || >= 10.*"
       }
@@ -2045,7 +2049,6 @@
       "version": "3.0.0",
       "resolved": "https://registry.npmjs.org/is-fullwidth-code-point/-/is-fullwidth-code-point-3.0.0.tgz",
       "integrity": "sha512-zymm5+u+sCsSWyD9qNaejV3DFvhCKclKdizYaJUuHA83RLjb7nSuGnddCHGv0hk+KY7BMAlsWeK4Ueg6EV6XQg==",
-      "dev": true,
       "engines": {
         "node": ">=8"
       }
@@ -3521,7 +3524,6 @@
       "version": "2.1.1",
       "resolved": "https://registry.npmjs.org/require-directory/-/require-directory-2.1.1.tgz",
       "integrity": "sha512-fGxEI7+wsG9xrvdjsrlmL22OMTTiHRwAMroiEeMgq8gzoLC/PQr7RsRDSTLUg/bZAZtF+TVIkHc6/4RIKrui+Q==",
-      "dev": true,
       "engines": {
         "node": ">=0.10.0"
       }
@@ -3705,7 +3707,6 @@
       "version": "4.2.3",
       "resolved": "https://registry.npmjs.org/string-width/-/string-width-4.2.3.tgz",
       "integrity": "sha512-wKyQRQpjJ0sIp62ErSZdGsjMJWsap5oRNihHhu6G7JVO/9jIB6UyevL+tXuOqrng8j/cxKTWyWUwvSTriiZz/g==",
-      "dev": true,
       "dependencies": {
         "emoji-regex": "^8.0.0",
         "is-fullwidth-code-point": "^3.0.0",
@@ -3719,7 +3720,6 @@
       "version": "6.0.1",
       "resolved": "https://registry.npmjs.org/strip-ansi/-/strip-ansi-6.0.1.tgz",
       "integrity": "sha512-Y38VPSHcqkFrCpFnQ9vuSXmquuv5oXOKpGeT6aGrr3o3Gc9AlVa6JBfUSOCnbxGGZF+/0ooI7KrPuUSztUdU5A==",
-      "dev": true,
       "dependencies": {
         "ansi-regex": "^5.0.1"
       },
@@ -4225,7 +4225,6 @@
       "version": "7.0.0",
       "resolved": "https://registry.npmjs.org/wrap-ansi/-/wrap-ansi-7.0.0.tgz",
       "integrity": "sha512-YVGIj2kamLSTxw6NsZjoBxfSwsn0ycdesmc4p+Q21c5zPuZ1pl+NfxVdxPtdHvmNVOQ6XSYG4AUtyt/Fi7D16Q==",
-      "dev": true,
       "dependencies": {
         "ansi-styles": "^4.0.0",
         "string-width": "^4.1.0",
@@ -4261,7 +4260,6 @@
       "version": "5.0.8",
       "resolved": "https://registry.npmjs.org/y18n/-/y18n-5.0.8.tgz",
       "integrity": "sha512-0pfFzegeDWJHJIAmTLRP2DwHjdF5s7jo9tuztdQxAhINCdvS+3nGINqPd00AphqJR/0LhANUS6/+7SCb98YOfA==",
-      "dev": true,
       "engines": {
         "node": ">=10"
       }
@@ -4276,7 +4274,6 @@
       "version": "17.7.1",
       "resolved": "https://registry.npmjs.org/yargs/-/yargs-17.7.1.tgz",
       "integrity": "sha512-cwiTb08Xuv5fqF4AovYacTFNxk62th7LKJ6BL9IGUpTJrWoU7/7WdQGTP2SjKf1dUNBGzDd28p/Yfs/GI6JrLw==",
-      "dev": true,
       "dependencies": {
         "cliui": "^8.0.1",
         "escalade": "^3.1.1",
@@ -4294,7 +4291,6 @@
       "version": "21.1.1",
       "resolved": "https://registry.npmjs.org/yargs-parser/-/yargs-parser-21.1.1.tgz",
       "integrity": "sha512-tVpsJW7DdjecAiFpbIB1e3qxIQsE6NoPc5/eTdrbbIC4h0LVsWhnoa3g+m2HclBIujHzsxZ4VJVA+GUuc2/LBw==",
-      "dev": true,
       "engines": {
         "node": ">=12"
       }
@@ -4766,6 +4762,14 @@
       "integrity": "sha512-0hYQ8SB4Db5zvZB4axdMHGwEaQjkZzFjQiN9LVYvIFB2nSUHW9tYpxWriPrWDASIxiaXax83REcLxuSdnGPZtw==",
       "dev": true
     },
+    "@cloud-cli/cli": {
+      "version": "1.6.0",
+      "resolved": "https://registry.npmjs.org/@cloud-cli/cli/-/cli-1.6.0.tgz",
+      "integrity": "sha512-caPn+/VAOIfoh4Q5b90X2EveTR+p+Vv4EufCfLJxU5CkWfTxTqWosGXjaVigS4sELyP3hiOv4kB+ZbhCy/eDWw==",
+      "requires": {
+        "yargs": "^17.6.2"
+      }
+    },
     "@cloud-cli/exec": {
       "version": "1.0.4",
       "resolved": "https://registry.npmjs.org/@cloud-cli/exec/-/exec-1.0.4.tgz",
@@ -5256,14 +5260,12 @@
     "ansi-regex": {
       "version": "5.0.1",
       "resolved": "https://registry.npmjs.org/ansi-regex/-/ansi-regex-5.0.1.tgz",
-      "integrity": "sha512-quJQXlTSUGL2LH9SUXo8VwsY4soanhgo6LNSm84E1LBcE8s3O0wpdiRzyR9z/ZZJMlMWv37qOOb9pdJlMUEKFQ==",
-      "dev": true
+      "integrity": "sha512-quJQXlTSUGL2LH9SUXo8VwsY4soanhgo6LNSm84E1LBcE8s3O0wpdiRzyR9z/ZZJMlMWv37qOOb9pdJlMUEKFQ=="
     },
     "ansi-styles": {
       "version": "4.3.0",
       "resolved": "https://registry.npmjs.org/ansi-styles/-/ansi-styles-4.3.0.tgz",
       "integrity": "sha512-zbB9rCJAT1rbjiVDb2hqKFHNYLxgtk8NURxZ3IZwD3F6NtxbXZQCnnSi1Lkx+IDohdPlFp222wVALIheZJQSEg==",
-      "dev": true,
       "requires": {
         "color-convert": "^2.0.1"
       }
@@ -5474,7 +5476,6 @@
       "version": "8.0.1",
       "resolved": "https://registry.npmjs.org/cliui/-/cliui-8.0.1.tgz",
       "integrity": "sha512-BSeNnyus75C4//NQ9gQt1/csTXyo/8Sb+afLAkzAptFuMsod9HFokGNudZpi/oQV73hnVK+sR+5PVRMd+Dr7YQ==",
-      "dev": true,
       "requires": {
         "string-width": "^4.2.0",
         "strip-ansi": "^6.0.1",
@@ -5497,7 +5498,6 @@
       "version": "2.0.1",
       "resolved": "https://registry.npmjs.org/color-convert/-/color-convert-2.0.1.tgz",
       "integrity": "sha512-RRECPsj7iu/xb5oKYcsFHSppFNnsj/52OVTRKb4zP5onXwVF3zVmmToNcOfGC+CRDpfK/U584fMg38ZHCaElKQ==",
-      "dev": true,
       "requires": {
         "color-name": "~1.1.4"
       }
@@ -5505,8 +5505,7 @@
     "color-name": {
       "version": "1.1.4",
       "resolved": "https://registry.npmjs.org/color-name/-/color-name-1.1.4.tgz",
-      "integrity": "sha512-dOy+3AuW3a2wNbZHIuMZpTcgjGuLU/uBL/ubcZF9OXbDo8ff4O8yVp5Bf0efS8uEoYo5q4Fx7dY9OgQGXgAsQA==",
-      "dev": true
+      "integrity": "sha512-dOy+3AuW3a2wNbZHIuMZpTcgjGuLU/uBL/ubcZF9OXbDo8ff4O8yVp5Bf0efS8uEoYo5q4Fx7dY9OgQGXgAsQA=="
     },
     "concat-map": {
       "version": "0.0.1",
@@ -5591,8 +5590,7 @@
     "emoji-regex": {
       "version": "8.0.0",
       "resolved": "https://registry.npmjs.org/emoji-regex/-/emoji-regex-8.0.0.tgz",
-      "integrity": "sha512-MSjYzcWNOA0ewAHpz0MxpYFvwg6yjy1NG3xteoqz644VCo/RPgnr1/GGt+ic3iJTzQ8Eu3TdM14SawnVUmGE6A==",
-      "dev": true
+      "integrity": "sha512-MSjYzcWNOA0ewAHpz0MxpYFvwg6yjy1NG3xteoqz644VCo/RPgnr1/GGt+ic3iJTzQ8Eu3TdM14SawnVUmGE6A=="
     },
     "error-ex": {
       "version": "1.3.2",
@@ -5606,8 +5604,7 @@
     "escalade": {
       "version": "3.1.1",
       "resolved": "https://registry.npmjs.org/escalade/-/escalade-3.1.1.tgz",
-      "integrity": "sha512-k0er2gUkLf8O0zKJiAhmkTnJlTvINGv7ygDNPbeIsX/TJjGJZHuh9B2UxbsaEkmlEo9MfhrSzmhIlhRlI2GXnw==",
-      "dev": true
+      "integrity": "sha512-k0er2gUkLf8O0zKJiAhmkTnJlTvINGv7ygDNPbeIsX/TJjGJZHuh9B2UxbsaEkmlEo9MfhrSzmhIlhRlI2GXnw=="
     },
     "escape-string-regexp": {
       "version": "2.0.0",
@@ -5774,8 +5771,7 @@
     "get-caller-file": {
       "version": "2.0.5",
       "resolved": "https://registry.npmjs.org/get-caller-file/-/get-caller-file-2.0.5.tgz",
-      "integrity": "sha512-DyFP3BM/3YHTQOCUL/w0OZHR0lpKeGrxotcHWcqNEdnltqFwXVfhEBQ94eIo34AfQpo0rGki4cyIiftY06h2Fg==",
-      "dev": true
+      "integrity": "sha512-DyFP3BM/3YHTQOCUL/w0OZHR0lpKeGrxotcHWcqNEdnltqFwXVfhEBQ94eIo34AfQpo0rGki4cyIiftY06h2Fg=="
     },
     "get-package-type": {
       "version": "0.1.0",
@@ -5892,8 +5888,7 @@
     "is-fullwidth-code-point": {
       "version": "3.0.0",
       "resolved": "https://registry.npmjs.org/is-fullwidth-code-point/-/is-fullwidth-code-point-3.0.0.tgz",
-      "integrity": "sha512-zymm5+u+sCsSWyD9qNaejV3DFvhCKclKdizYaJUuHA83RLjb7nSuGnddCHGv0hk+KY7BMAlsWeK4Ueg6EV6XQg==",
-      "dev": true
+      "integrity": "sha512-zymm5+u+sCsSWyD9qNaejV3DFvhCKclKdizYaJUuHA83RLjb7nSuGnddCHGv0hk+KY7BMAlsWeK4Ueg6EV6XQg=="
     },
     "is-generator-fn": {
       "version": "2.1.0",
@@ -7012,8 +7007,7 @@
     "require-directory": {
       "version": "2.1.1",
       "resolved": "https://registry.npmjs.org/require-directory/-/require-directory-2.1.1.tgz",
-      "integrity": "sha512-fGxEI7+wsG9xrvdjsrlmL22OMTTiHRwAMroiEeMgq8gzoLC/PQr7RsRDSTLUg/bZAZtF+TVIkHc6/4RIKrui+Q==",
-      "dev": true
+      "integrity": "sha512-fGxEI7+wsG9xrvdjsrlmL22OMTTiHRwAMroiEeMgq8gzoLC/PQr7RsRDSTLUg/bZAZtF+TVIkHc6/4RIKrui+Q=="
     },
     "resolve": {
       "version": "1.22.1",
@@ -7144,7 +7138,6 @@
       "version": "4.2.3",
       "resolved": "https://registry.npmjs.org/string-width/-/string-width-4.2.3.tgz",
       "integrity": "sha512-wKyQRQpjJ0sIp62ErSZdGsjMJWsap5oRNihHhu6G7JVO/9jIB6UyevL+tXuOqrng8j/cxKTWyWUwvSTriiZz/g==",
-      "dev": true,
       "requires": {
         "emoji-regex": "^8.0.0",
         "is-fullwidth-code-point": "^3.0.0",
@@ -7155,7 +7148,6 @@
       "version": "6.0.1",
       "resolved": "https://registry.npmjs.org/strip-ansi/-/strip-ansi-6.0.1.tgz",
       "integrity": "sha512-Y38VPSHcqkFrCpFnQ9vuSXmquuv5oXOKpGeT6aGrr3o3Gc9AlVa6JBfUSOCnbxGGZF+/0ooI7KrPuUSztUdU5A==",
-      "dev": true,
       "requires": {
         "ansi-regex": "^5.0.1"
       }
@@ -7506,7 +7498,6 @@
       "version": "7.0.0",
       "resolved": "https://registry.npmjs.org/wrap-ansi/-/wrap-ansi-7.0.0.tgz",
       "integrity": "sha512-YVGIj2kamLSTxw6NsZjoBxfSwsn0ycdesmc4p+Q21c5zPuZ1pl+NfxVdxPtdHvmNVOQ6XSYG4AUtyt/Fi7D16Q==",
-      "dev": true,
       "requires": {
         "ansi-styles": "^4.0.0",
         "string-width": "^4.1.0",
@@ -7532,8 +7523,7 @@
     "y18n": {
       "version": "5.0.8",
       "resolved": "https://registry.npmjs.org/y18n/-/y18n-5.0.8.tgz",
-      "integrity": "sha512-0pfFzegeDWJHJIAmTLRP2DwHjdF5s7jo9tuztdQxAhINCdvS+3nGINqPd00AphqJR/0LhANUS6/+7SCb98YOfA==",
-      "dev": true
+      "integrity": "sha512-0pfFzegeDWJHJIAmTLRP2DwHjdF5s7jo9tuztdQxAhINCdvS+3nGINqPd00AphqJR/0LhANUS6/+7SCb98YOfA=="
     },
     "yallist": {
       "version": "3.1.1",
@@ -7545,7 +7535,6 @@
       "version": "17.7.1",
       "resolved": "https://registry.npmjs.org/yargs/-/yargs-17.7.1.tgz",
       "integrity": "sha512-cwiTb08Xuv5fqF4AovYacTFNxk62th7LKJ6BL9IGUpTJrWoU7/7WdQGTP2SjKf1dUNBGzDd28p/Yfs/GI6JrLw==",
-      "dev": true,
       "requires": {
         "cliui": "^8.0.1",
         "escalade": "^3.1.1",
@@ -7559,8 +7548,7 @@
     "yargs-parser": {
       "version": "21.1.1",
       "resolved": "https://registry.npmjs.org/yargs-parser/-/yargs-parser-21.1.1.tgz",
-      "integrity": "sha512-tVpsJW7DdjecAiFpbIB1e3qxIQsE6NoPc5/eTdrbbIC4h0LVsWhnoa3g+m2HclBIujHzsxZ4VJVA+GUuc2/LBw==",
-      "dev": true
+      "integrity": "sha512-tVpsJW7DdjecAiFpbIB1e3qxIQsE6NoPc5/eTdrbbIC4h0LVsWhnoa3g+m2HclBIujHzsxZ4VJVA+GUuc2/LBw=="
     },
     "yn": {
       "version": "3.1.1",
diff --git a/package.json b/package.json
index 3a631a3..1d7f9ed 100644
--- a/package.json
+++ b/package.json
@@ -23,6 +23,7 @@
     "@cloud-cli/typescript-config": "^1.0.0"
   },
   "dependencies": {
+    "@cloud-cli/cli": "^1.6.0",
     "@cloud-cli/exec": "^1.0.4"
   }
 }
diff --git a/src/index.spec.ts b/src/index.spec.ts
index ca9ab4e..1ff4475 100644
--- a/src/index.spec.ts
+++ b/src/index.spec.ts
@@ -1,12 +1,18 @@
-import { DNS } from './index';
-import dns from './index';
+import dns, { parseDNSLine } from './index';
 import fs from 'fs';
 import * as exec from '@cloud-cli/exec';
+import { init } from '@cloud-cli/cli';
+
+beforeEach(() => {
+  jest.spyOn(fs, 'writeFileSync').mockImplementation();
+  jest.spyOn(fs, 'readFileSync').mockImplementation(() => '');
+});
 
 describe('dns', () => {
   it('should parse a DNS configuration line', () => {
     const line = 'address=/foo/1.2.3.4';
-    const output = DNS.parse(line);
+    const output = parseDNSLine(line);
+
     expect(output).toEqual({ target: '1.2.3.4', domain: 'foo' });
   });
 
@@ -15,9 +21,9 @@ describe('dns', () => {
     const buffer = `address=/test/1.2.3.4\naddress=/foo/5.6.7.8`;
     jest.spyOn(fs, 'existsSync').mockImplementation(() => fileExists);
     jest.spyOn(fs, 'readFileSync').mockImplementation(() => buffer);
-    
+
     expect(dns.list()).toEqual([]);
-    
+
     fileExists = true;
     const list = dns.list();
     expect(list).toEqual([
@@ -57,4 +63,13 @@ describe('dns', () => {
       await expect(dns.reload()).rejects.toEqual(new Error('Failed to reload'));
     });
   });
+
+  describe('dns configuration', () => {
+    it('should configure the default target', () => {
+      dns[init]({ defaultTarget: '1.1.2.2' });
+      dns.add({ domain: 'bar' });
+
+      expect(fs.writeFileSync).toHaveBeenCalledWith(expect.any(String), 'address=/bar/1.1.2.2');
+    });
+  })
 });
diff --git a/src/index.ts b/src/index.ts
index e2dd427..3afc43f 100644
--- a/src/index.ts
+++ b/src/index.ts
@@ -1,10 +1,17 @@
-import { writeFileSync, readFileSync, existsSync } from 'fs';
+import fs from 'fs';
 import { join } from 'path';
 import { exec } from '@cloud-cli/exec';
+import { init } from '@cloud-cli/cli';
+
+interface DNSConfig {
+  defaultTarget?: string;
+}
 
 const lineParse = /^address=\/(.+)\/(.+)$/;
 const filePath = join(process.cwd(), 'configuration', 'apps.conf');
-const defaultTarget = process.env.DEFAULT_TARGET || '127.0.0.1';
+const dnsConfig: DNSConfig = {
+  defaultTarget: '127.0.0.1'
+};
 
 interface DomainAndTarget {
   domain: string;
@@ -15,13 +22,13 @@ function add(input: DomainAndTarget) {
   let current = list();
 
   if (!input.target) {
-    input.target = defaultTarget;
+    input.target = dnsConfig.defaultTarget;
   }
 
   current = current.filter(item => item.domain !== input.domain);
   current.push(input);
   save(current);
-  
+
   return true;
 }
 
@@ -33,11 +40,11 @@ function remove(input: DomainAndTarget) {
 }
 
 function list(): DomainAndTarget[] {
-  if (!existsSync(filePath)) {
+  if (!fs.existsSync(filePath)) {
     return [];
   }
 
-  const input = readFileSync(filePath, 'utf8');
+  const input = fs.readFileSync(filePath, 'utf8');
   const entries = input
     .trim()
     .split('\n')
@@ -52,14 +59,21 @@ async function reload() {
   return cmd.ok || Promise.reject(new Error('Failed to reload'));
 }
 
+function addDnsConfig(options: DNSConfig) {
+  if (options && options.defaultTarget) {
+    dnsConfig.defaultTarget = options.defaultTarget;
+  }
+}
+
 function save(list: DomainAndTarget[]) {
-  const txt = list.map(line => `address=/${line.domain}/${line.target || defaultTarget}`);
-  writeFileSync(filePath, txt.join('\n'));
+  const txt = list.map(line => `address=/${line.domain}/${line.target}`);
+  console.log('save', filePath, txt);
+  fs.writeFileSync(filePath, txt.join('\n'));
 }
 
-function parseDNSLine(line: string) {
+export function parseDNSLine(line: string) {
   const parts = line.match(lineParse);
   return { domain: parts[1], target: parts[2] }
 }
 
-export default { add, remove, list, reload }
+export default { add, remove, list, reload, [init]: addDnsConfig }