diff --git a/packages/backend/migration/1697247230117-InstanceSilence.js b/packages/backend/migration/1697247230117-InstanceSilence.js
new file mode 100644
index 0000000000..bf8a1443eb
--- /dev/null
+++ b/packages/backend/migration/1697247230117-InstanceSilence.js
@@ -0,0 +1,16 @@
+/*
+ * SPDX-FileCopyrightText: syuilo and other misskey contributors
+ * SPDX-License-Identifier: AGPL-3.0-only
+ */
+
+export class InstanceSilence1697247230117 {
+    name = 'InstanceSilence1697247230117'
+
+    async up(queryRunner) {
+        await queryRunner.query(`ALTER TABLE "meta" ADD "silencedHosts" character varying(1024) array NOT NULL DEFAULT '{}'`);
+    }
+
+    async down(queryRunner) {
+        await queryRunner.query(`ALTER TABLE "flash" ALTER COLUMN "visibility" DROP NOT NULL`);
+    }
+}
diff --git a/packages/backend/src/core/UserFollowingService.ts b/packages/backend/src/core/UserFollowingService.ts
index beffcc2e9c..0a314c1193 100644
--- a/packages/backend/src/core/UserFollowingService.ts
+++ b/packages/backend/src/core/UserFollowingService.ts
@@ -5,7 +5,7 @@
 
 import { Inject, Injectable, OnModuleInit, forwardRef } from '@nestjs/common';
 import { ModuleRef } from '@nestjs/core';
-import { IsNull } from 'typeorm';
+import {DataSource, IsNull } from 'typeorm';
 import type { MiLocalUser, MiPartialLocalUser, MiPartialRemoteUser, MiRemoteUser, MiUser } from '@/models/User.js';
 import { IdentifiableError } from '@/misc/identifiable-error.js';
 import { QueueService } from '@/core/QueueService.js';
@@ -29,6 +29,8 @@ import { CacheService } from '@/core/CacheService.js';
 import type { Config } from '@/config.js';
 import { AccountMoveService } from '@/core/AccountMoveService.js';
 import Logger from '../logger.js';
+import { shouldSilenceInstance } from "@/misc/should-block-instance.js";
+
 
 const logger = new Logger('following/create');
 
@@ -52,6 +54,9 @@ export class UserFollowingService implements OnModuleInit {
 	constructor(
 		private moduleRef: ModuleRef,
 
+		@Inject(DI.db)
+		private db: DataSource,
+
 		@Inject(DI.config)
 		private config: Config,
 
@@ -121,12 +126,14 @@ export class UserFollowingService implements OnModuleInit {
 
 		// フォロー対象が鍵アカウントである or
 		// フォロワーがBotであり、フォロー対象がBotからのフォローに慎重である or
-		// フォロワーがローカルユーザーであり、フォロー対象がリモートユーザーである
+		// フォロワーがローカルユーザーであり、フォロー対象がリモートユーザーである or
+		// フォロワーがローカルユーザーであり、フォロー対象がサイレンスされているサーバーである
 		// 上記のいずれかに当てはまる場合はすぐフォローせずにフォローリクエストを発行しておく
 		if (
 			followee.isLocked ||
 			(followeeProfile.carefulBot && follower.isBot) ||
-			(this.userEntityService.isLocalUser(follower) && this.userEntityService.isRemoteUser(followee) && process.env.FORCE_FOLLOW_REMOTE_USER_FOR_TESTING !== 'true')
+			(this.userEntityService.isLocalUser(follower) && this.userEntityService.isRemoteUser(followee) && process.env.FORCE_FOLLOW_REMOTE_USER_FOR_TESTING !== 'true') ||
+			( this.userEntityService.isLocalUser(followee) && this.userEntityService.isRemoteUser(follower) && await shouldSilenceInstance(follower.host,this.db))
 		) {
 			let autoAccept = false;
 
diff --git a/packages/backend/src/core/entities/InstanceEntityService.ts b/packages/backend/src/core/entities/InstanceEntityService.ts
index 0e27e9df7f..15c1d07c1b 100644
--- a/packages/backend/src/core/entities/InstanceEntityService.ts
+++ b/packages/backend/src/core/entities/InstanceEntityService.ts
@@ -3,17 +3,23 @@
  * SPDX-License-Identifier: AGPL-3.0-only
  */
 
-import { Injectable } from '@nestjs/common';
+import {Inject, Injectable} from '@nestjs/common';
 import type { Packed } from '@/misc/json-schema.js';
 import type { } from '@/models/Blocking.js';
 import type { MiInstance } from '@/models/Instance.js';
 import { MetaService } from '@/core/MetaService.js';
 import { bindThis } from '@/decorators.js';
 import { UtilityService } from '../UtilityService.js';
+import {shouldSilenceInstance} from "@/misc/should-block-instance.js";
+import { DataSource } from 'typeorm';
+import {DI} from "@/di-symbols.js";
 
 @Injectable()
 export class InstanceEntityService {
 	constructor(
+		@Inject(DI.db)
+		private db: DataSource,
+
 		private metaService: MetaService,
 
 		private utilityService: UtilityService,
@@ -43,6 +49,7 @@ export class InstanceEntityService {
 			description: instance.description,
 			maintainerName: instance.maintainerName,
 			maintainerEmail: instance.maintainerEmail,
+			isSilenced: await shouldSilenceInstance(instance.host,this.db),
 			iconUrl: instance.iconUrl,
 			faviconUrl: instance.faviconUrl,
 			themeColor: instance.themeColor,
diff --git a/packages/backend/src/misc/fetch-meta.ts b/packages/backend/src/misc/fetch-meta.ts
new file mode 100644
index 0000000000..99964a300a
--- /dev/null
+++ b/packages/backend/src/misc/fetch-meta.ts
@@ -0,0 +1,40 @@
+import { DataSource } from 'typeorm';
+import { MiMeta } from "@/models/Meta.js";
+
+let cache: MiMeta;
+
+export async function fetchMeta(noCache = false , db: DataSource): Promise<MiMeta> {
+	if (!noCache && cache) return cache;
+
+	return await db.transaction(async (transactionalEntityManager) => {
+		// New IDs are prioritized because multiple records may have been created due to past bugs.
+		const metas = await transactionalEntityManager.find(MiMeta, {
+			order: {
+				id: "DESC",
+			},
+		});
+
+		const meta = metas[0];
+
+		if (meta) {
+			cache = meta;
+			return meta;
+		} else {
+			// If fetchMeta is called at the same time when meta is empty, this part may be called at the same time, so use fail-safe upsert.
+			const saved = await transactionalEntityManager
+				.upsert(
+					MiMeta,
+					{
+						id: "x",
+					},
+					["id"],
+				)
+				.then((x) =>
+					transactionalEntityManager.findOneByOrFail(MiMeta, x.identifiers[0]),
+				);
+
+			cache = saved;
+			return saved;
+		}
+	});
+}
diff --git a/packages/backend/src/misc/should-block-instance.ts b/packages/backend/src/misc/should-block-instance.ts
new file mode 100644
index 0000000000..0c38d3867e
--- /dev/null
+++ b/packages/backend/src/misc/should-block-instance.ts
@@ -0,0 +1,15 @@
+import { fetchMeta } from "@/misc/fetch-meta.js";
+import type { MiInstance } from "@/models/Instance.js";
+import type { MiMeta } from "@/models/Meta.js";
+import { DataSource } from "typeorm";
+
+export async function shouldSilenceInstance(
+	host: MiInstance["host"],
+	db : DataSource,
+	meta?: MiMeta,
+): Promise<boolean> {
+	const { silencedHosts } = meta ?? (await fetchMeta(true,db));
+	return silencedHosts.some(
+		(limitedHost: string) => host === limitedHost || host.endsWith(`.${limitedHost}`),
+	);
+}
diff --git a/packages/backend/src/models/Meta.ts b/packages/backend/src/models/Meta.ts
index d2bd0c26e9..23ae513ede 100644
--- a/packages/backend/src/models/Meta.ts
+++ b/packages/backend/src/models/Meta.ts
@@ -76,6 +76,11 @@ export class MiMeta {
 	})
 	public sensitiveWords: string[];
 
+	@Column('varchar', {
+		length: 1024, array: true, default: '{}',
+	})
+	public silencedHosts: string[];
+
 	@Column('varchar', {
 		length: 1024,
 		nullable: true,
diff --git a/packages/backend/src/models/json-schema/federation-instance.ts b/packages/backend/src/models/json-schema/federation-instance.ts
index ac07519f16..4ad84d02ff 100644
--- a/packages/backend/src/models/json-schema/federation-instance.ts
+++ b/packages/backend/src/models/json-schema/federation-instance.ts
@@ -93,6 +93,11 @@ export const packedFederationInstanceSchema = {
 			type: 'string',
 			optional: false, nullable: true,
 		},
+		isSilenced: {
+			type: "boolean",
+			optional: false,
+			nullable: false,
+		},
 		infoUpdatedAt: {
 			type: 'string',
 			optional: false, nullable: true,
diff --git a/packages/backend/src/server/api/endpoints/admin/meta.ts b/packages/backend/src/server/api/endpoints/admin/meta.ts
index 5a74456ab0..f294934344 100644
--- a/packages/backend/src/server/api/endpoints/admin/meta.ts
+++ b/packages/backend/src/server/api/endpoints/admin/meta.ts
@@ -105,6 +105,16 @@ export const meta = {
 				type: 'boolean',
 				optional: false, nullable: false,
 			},
+			silencedHosts: {
+				type: "array",
+				optional: true,
+				nullable: false,
+				items: {
+					type: "string",
+					optional: false,
+					nullable: false,
+				},
+			},
 			pinnedUsers: {
 				type: 'array',
 				optional: false, nullable: false,
@@ -367,6 +377,7 @@ export default class extends Endpoint<typeof meta, typeof paramDef> { // eslint-
 				pinnedUsers: instance.pinnedUsers,
 				hiddenTags: instance.hiddenTags,
 				blockedHosts: instance.blockedHosts,
+				silencedHosts: instance.silencedHosts,
 				sensitiveWords: instance.sensitiveWords,
 				preservedUsernames: instance.preservedUsernames,
 				hcaptchaSecretKey: instance.hcaptchaSecretKey,
diff --git a/packages/backend/src/server/api/endpoints/admin/update-meta.ts b/packages/backend/src/server/api/endpoints/admin/update-meta.ts
index 7db25e659f..c2d1f19b89 100644
--- a/packages/backend/src/server/api/endpoints/admin/update-meta.ts
+++ b/packages/backend/src/server/api/endpoints/admin/update-meta.ts
@@ -3,11 +3,11 @@
  * SPDX-License-Identifier: AGPL-3.0-only
  */
 
-import { Injectable } from '@nestjs/common';
-import type { MiMeta } from '@/models/Meta.js';
-import { ModerationLogService } from '@/core/ModerationLogService.js';
-import { Endpoint } from '@/server/api/endpoint-base.js';
-import { MetaService } from '@/core/MetaService.js';
+import {Injectable} from '@nestjs/common';
+import type {MiMeta} from '@/models/Meta.js';
+import {ModerationLogService} from '@/core/ModerationLogService.js';
+import {Endpoint} from '@/server/api/endpoint-base.js';
+import {MetaService} from '@/core/MetaService.js';
 
 export const meta = {
 	tags: ['admin'],
@@ -19,102 +19,119 @@ export const meta = {
 export const paramDef = {
 	type: 'object',
 	properties: {
-		disableRegistration: { type: 'boolean', nullable: true },
-		pinnedUsers: { type: 'array', nullable: true, items: {
-			type: 'string',
-		} },
-		hiddenTags: { type: 'array', nullable: true, items: {
-			type: 'string',
-		} },
-		blockedHosts: { type: 'array', nullable: true, items: {
-			type: 'string',
-		} },
-		sensitiveWords: { type: 'array', nullable: true, items: {
-			type: 'string',
-		} },
-		themeColor: { type: 'string', nullable: true, pattern: '^#[0-9a-fA-F]{6}$' },
-		mascotImageUrl: { type: 'string', nullable: true },
-		bannerUrl: { type: 'string', nullable: true },
-		serverErrorImageUrl: { type: 'string', nullable: true },
-		infoImageUrl: { type: 'string', nullable: true },
-		notFoundImageUrl: { type: 'string', nullable: true },
-		iconUrl: { type: 'string', nullable: true },
-		app192IconUrl: { type: 'string', nullable: true },
-		app512IconUrl: { type: 'string', nullable: true },
-		backgroundImageUrl: { type: 'string', nullable: true },
-		logoImageUrl: { type: 'string', nullable: true },
-		name: { type: 'string', nullable: true },
-		shortName: { type: 'string', nullable: true },
-		description: { type: 'string', nullable: true },
-		defaultLightTheme: { type: 'string', nullable: true },
-		defaultDarkTheme: { type: 'string', nullable: true },
-		cacheRemoteFiles: { type: 'boolean' },
-		cacheRemoteSensitiveFiles: { type: 'boolean' },
-		emailRequiredForSignup: { type: 'boolean' },
-		enableHcaptcha: { type: 'boolean' },
-		hcaptchaSiteKey: { type: 'string', nullable: true },
-		hcaptchaSecretKey: { type: 'string', nullable: true },
-		enableRecaptcha: { type: 'boolean' },
-		recaptchaSiteKey: { type: 'string', nullable: true },
-		recaptchaSecretKey: { type: 'string', nullable: true },
-		enableTurnstile: { type: 'boolean' },
-		turnstileSiteKey: { type: 'string', nullable: true },
-		turnstileSecretKey: { type: 'string', nullable: true },
-		sensitiveMediaDetection: { type: 'string', enum: ['none', 'all', 'local', 'remote'] },
-		sensitiveMediaDetectionSensitivity: { type: 'string', enum: ['medium', 'low', 'high', 'veryLow', 'veryHigh'] },
-		setSensitiveFlagAutomatically: { type: 'boolean' },
-		enableSensitiveMediaDetectionForVideos: { type: 'boolean' },
-		proxyAccountId: { type: 'string', format: 'misskey:id', nullable: true },
-		maintainerName: { type: 'string', nullable: true },
-		maintainerEmail: { type: 'string', nullable: true },
-		langs: { type: 'array', items: {
-			type: 'string',
-		} },
-		summalyProxy: { type: 'string', nullable: true },
-		deeplAuthKey: { type: 'string', nullable: true },
-		deeplIsPro: { type: 'boolean' },
-		enableEmail: { type: 'boolean' },
-		email: { type: 'string', nullable: true },
-		smtpSecure: { type: 'boolean' },
-		smtpHost: { type: 'string', nullable: true },
-		smtpPort: { type: 'integer', nullable: true },
-		smtpUser: { type: 'string', nullable: true },
-		smtpPass: { type: 'string', nullable: true },
-		enableServiceWorker: { type: 'boolean' },
-		swPublicKey: { type: 'string', nullable: true },
-		swPrivateKey: { type: 'string', nullable: true },
-		tosUrl: { type: 'string', nullable: true },
-		repositoryUrl: { type: 'string' },
-		feedbackUrl: { type: 'string' },
-		impressumUrl: { type: 'string' },
-		privacyPolicyUrl: { type: 'string' },
-		useObjectStorage: { type: 'boolean' },
-		objectStorageBaseUrl: { type: 'string', nullable: true },
-		objectStorageBucket: { type: 'string', nullable: true },
-		objectStoragePrefix: { type: 'string', nullable: true },
-		objectStorageEndpoint: { type: 'string', nullable: true },
-		objectStorageRegion: { type: 'string', nullable: true },
-		objectStoragePort: { type: 'integer', nullable: true },
-		objectStorageAccessKey: { type: 'string', nullable: true },
-		objectStorageSecretKey: { type: 'string', nullable: true },
-		objectStorageUseSSL: { type: 'boolean' },
-		objectStorageUseProxy: { type: 'boolean' },
-		objectStorageSetPublicRead: { type: 'boolean' },
-		objectStorageS3ForcePathStyle: { type: 'boolean' },
-		enableIpLogging: { type: 'boolean' },
-		enableActiveEmailValidation: { type: 'boolean' },
-		enableChartsForRemoteUser: { type: 'boolean' },
-		enableChartsForFederatedInstances: { type: 'boolean' },
-		enableServerMachineStats: { type: 'boolean' },
-		enableIdenticonGeneration: { type: 'boolean' },
-		serverRules: { type: 'array', items: { type: 'string' } },
-		preservedUsernames: { type: 'array', items: { type: 'string' } },
-		manifestJsonOverride: { type: 'string' },
-		perLocalUserUserTimelineCacheMax: { type: 'integer' },
-		perRemoteUserUserTimelineCacheMax: { type: 'integer' },
-		perUserHomeTimelineCacheMax: { type: 'integer' },
-		perUserListTimelineCacheMax: { type: 'integer' },
-		notesPerOneAd: { type: 'integer' },
+		disableRegistration: {type: 'boolean', nullable: true},
+		pinnedUsers: {
+			type: 'array', nullable: true, items: {
+				type: 'string',
+			}
+		},
+		hiddenTags: {
+			type: 'array', nullable: true, items: {
+				type: 'string',
+			}
+		},
+		blockedHosts: {
+			type: 'array', nullable: true, items: {
+				type: 'string',
+			}
+		},
+		sensitiveWords: {
+			type: 'array', nullable: true, items: {
+				type: 'string',
+			}
+		},
+		themeColor: {type: 'string', nullable: true, pattern: '^#[0-9a-fA-F]{6}$'},
+		mascotImageUrl: {type: 'string', nullable: true},
+		bannerUrl: {type: 'string', nullable: true},
+		serverErrorImageUrl: {type: 'string', nullable: true},
+		infoImageUrl: {type: 'string', nullable: true},
+		notFoundImageUrl: {type: 'string', nullable: true},
+		iconUrl: {type: 'string', nullable: true},
+		app192IconUrl: {type: 'string', nullable: true},
+		app512IconUrl: {type: 'string', nullable: true},
+		backgroundImageUrl: {type: 'string', nullable: true},
+		logoImageUrl: {type: 'string', nullable: true},
+		name: {type: 'string', nullable: true},
+		shortName: {type: 'string', nullable: true},
+		description: {type: 'string', nullable: true},
+		defaultLightTheme: {type: 'string', nullable: true},
+		defaultDarkTheme: {type: 'string', nullable: true},
+		cacheRemoteFiles: {type: 'boolean'},
+		cacheRemoteSensitiveFiles: {type: 'boolean'},
+		emailRequiredForSignup: {type: 'boolean'},
+		enableHcaptcha: {type: 'boolean'},
+		hcaptchaSiteKey: {type: 'string', nullable: true},
+		hcaptchaSecretKey: {type: 'string', nullable: true},
+		enableRecaptcha: {type: 'boolean'},
+		recaptchaSiteKey: {type: 'string', nullable: true},
+		recaptchaSecretKey: {type: 'string', nullable: true},
+		enableTurnstile: {type: 'boolean'},
+		turnstileSiteKey: {type: 'string', nullable: true},
+		turnstileSecretKey: {type: 'string', nullable: true},
+		sensitiveMediaDetection: {type: 'string', enum: ['none', 'all', 'local', 'remote']},
+		sensitiveMediaDetectionSensitivity: {type: 'string', enum: ['medium', 'low', 'high', 'veryLow', 'veryHigh']},
+		setSensitiveFlagAutomatically: {type: 'boolean'},
+		enableSensitiveMediaDetectionForVideos: {type: 'boolean'},
+		proxyAccountId: {type: 'string', format: 'misskey:id', nullable: true},
+		maintainerName: {type: 'string', nullable: true},
+		maintainerEmail: {type: 'string', nullable: true},
+		langs: {
+			type: 'array', items: {
+				type: 'string',
+			}
+		},
+		summalyProxy: {type: 'string', nullable: true},
+		deeplAuthKey: {type: 'string', nullable: true},
+		deeplIsPro: {type: 'boolean'},
+		enableEmail: {type: 'boolean'},
+		email: {type: 'string', nullable: true},
+		smtpSecure: {type: 'boolean'},
+		smtpHost: {type: 'string', nullable: true},
+		smtpPort: {type: 'integer', nullable: true},
+		smtpUser: {type: 'string', nullable: true},
+		smtpPass: {type: 'string', nullable: true},
+		enableServiceWorker: {type: 'boolean'},
+		swPublicKey: {type: 'string', nullable: true},
+		swPrivateKey: {type: 'string', nullable: true},
+		tosUrl: {type: 'string', nullable: true},
+		repositoryUrl: {type: 'string'},
+		feedbackUrl: {type: 'string'},
+		impressumUrl: {type: 'string'},
+		privacyPolicyUrl: {type: 'string'},
+		useObjectStorage: {type: 'boolean'},
+		objectStorageBaseUrl: {type: 'string', nullable: true},
+		objectStorageBucket: {type: 'string', nullable: true},
+		objectStoragePrefix: {type: 'string', nullable: true},
+		objectStorageEndpoint: {type: 'string', nullable: true},
+		objectStorageRegion: {type: 'string', nullable: true},
+		objectStoragePort: {type: 'integer', nullable: true},
+		objectStorageAccessKey: {type: 'string', nullable: true},
+		objectStorageSecretKey: {type: 'string', nullable: true},
+		objectStorageUseSSL: {type: 'boolean'},
+		objectStorageUseProxy: {type: 'boolean'},
+		objectStorageSetPublicRead: {type: 'boolean'},
+		objectStorageS3ForcePathStyle: {type: 'boolean'},
+		enableIpLogging: {type: 'boolean'},
+		enableActiveEmailValidation: {type: 'boolean'},
+		enableChartsForRemoteUser: {type: 'boolean'},
+		enableChartsForFederatedInstances: {type: 'boolean'},
+		enableServerMachineStats: {type: 'boolean'},
+		enableIdenticonGeneration: {type: 'boolean'},
+		serverRules: {type: 'array', items: {type: 'string'}},
+		preservedUsernames: {type: 'array', items: {type: 'string'}},
+		manifestJsonOverride: {type: 'string'},
+		perLocalUserUserTimelineCacheMax: {type: 'integer'},
+		perRemoteUserUserTimelineCacheMax: {type: 'integer'},
+		perUserHomeTimelineCacheMax: {type: 'integer'},
+		perUserListTimelineCacheMax: {type: 'integer'},
+		notesPerOneAd: {type: 'integer'},
+		silencedHosts: {
+			type: "array",
+			nullable: true,
+			items: {
+				type: "string",
+			},
+		},
 	},
 	required: [],
 } as const;
@@ -147,7 +164,14 @@ export default class extends Endpoint<typeof meta, typeof paramDef> { // eslint-
 			if (Array.isArray(ps.sensitiveWords)) {
 				set.sensitiveWords = ps.sensitiveWords.filter(Boolean);
 			}
-
+			if (Array.isArray(ps.silencedHosts)) {
+				let lastValue = "";
+				set.silencedHosts = ps.silencedHosts.sort().filter((h) => {
+					const lv = lastValue;
+					lastValue = h;
+					return h !== "" && h !== lv && !set.blockedHosts?.includes(h);
+				});
+			}
 			if (ps.themeColor !== undefined) {
 				set.themeColor = ps.themeColor;
 			}
diff --git a/packages/backend/src/server/api/endpoints/federation/instances.ts b/packages/backend/src/server/api/endpoints/federation/instances.ts
index be73e5dbb8..c8beefa9c7 100644
--- a/packages/backend/src/server/api/endpoints/federation/instances.ts
+++ b/packages/backend/src/server/api/endpoints/federation/instances.ts
@@ -36,6 +36,7 @@ export const paramDef = {
 		blocked: { type: 'boolean', nullable: true },
 		notResponding: { type: 'boolean', nullable: true },
 		suspended: { type: 'boolean', nullable: true },
+		silenced: { type: "boolean", nullable: true },
 		federating: { type: 'boolean', nullable: true },
 		subscribing: { type: 'boolean', nullable: true },
 		publishing: { type: 'boolean', nullable: true },
@@ -102,6 +103,23 @@ export default class extends Endpoint<typeof meta, typeof paramDef> { // eslint-
 				}
 			}
 
+			if (typeof ps.silenced === "boolean") {
+				const meta = await this.metaService.fetch(true);
+
+				if (ps.silenced) {
+					if (meta.silencedHosts.length === 0) {
+						return [];
+					}
+					query.andWhere("instance.host IN (:...silences)", {
+						silences: meta.silencedHosts,
+					});
+				} else if (meta.silencedHosts.length > 0) {
+					query.andWhere("instance.host NOT IN (:...silences)", {
+						silences: meta.silencedHosts,
+					});
+				}
+			}
+
 			if (typeof ps.federating === 'boolean') {
 				if (ps.federating) {
 					query.andWhere('((instance.followingCount > 0) OR (instance.followersCount > 0))');
diff --git a/packages/frontend/src/components/MkInstanceCardMini.vue b/packages/frontend/src/components/MkInstanceCardMini.vue
index de726e3aa4..6ca4266658 100644
--- a/packages/frontend/src/components/MkInstanceCardMini.vue
+++ b/packages/frontend/src/components/MkInstanceCardMini.vue
@@ -4,7 +4,7 @@ SPDX-License-Identifier: AGPL-3.0-only
 -->
 
 <template>
-<div :class="[$style.root, { yellow: instance.isNotResponding, red: instance.isBlocked, gray: instance.isSuspended }]">
+<div :class="[$style.root, { yellow: instance.isNotResponding, red: instance.isBlocked, gray: instance.isSuspended , blue:instance.isSilenced }]">
 	<img class="icon" :src="getInstanceIcon(instance)" alt="" loading="lazy"/>
 	<div class="body">
 		<span class="host">{{ instance.name ?? instance.host }}</span>
@@ -89,6 +89,12 @@ function getInstanceIcon(instance): string {
 		height: 30px;
 	}
 
+  &:global(.blue) {
+    --c: rgba(0, 42, 255, 0.15);
+    background-image: linear-gradient(45deg, var(--c) 16.67%, transparent 16.67%, transparent 50%, var(--c) 50%, var(--c) 66.67%, transparent 66.67%, transparent 100%);
+    background-size: 16px 16px;
+  }
+
 	&:global(.yellow) {
 		--c: rgb(255 196 0 / 15%);
 		background-image: linear-gradient(45deg, var(--c) 16.67%, transparent 16.67%, transparent 50%, var(--c) 50%, var(--c) 66.67%, transparent 66.67%, transparent 100%);
diff --git a/packages/frontend/src/pages/about.federation.vue b/packages/frontend/src/pages/about.federation.vue
index 2aa5af939b..4798160f15 100644
--- a/packages/frontend/src/pages/about.federation.vue
+++ b/packages/frontend/src/pages/about.federation.vue
@@ -18,6 +18,7 @@ SPDX-License-Identifier: AGPL-3.0-only
 				<option value="subscribing">{{ i18n.ts.subscribing }}</option>
 				<option value="publishing">{{ i18n.ts.publishing }}</option>
 				<option value="suspended">{{ i18n.ts.suspended }}</option>
+				<option value="silenced">{{ i18n.ts.silence }}</option>
 				<option value="blocked">{{ i18n.ts.blocked }}</option>
 				<option value="notResponding">{{ i18n.ts.notResponding }}</option>
 			</MkSelect>
@@ -75,6 +76,7 @@ const pagination = {
 			state === 'publishing' ? { publishing: true } :
 			state === 'suspended' ? { suspended: true } :
 			state === 'blocked' ? { blocked: true } :
+			state === 'silenced' ? {silenced: true} :
 			state === 'notResponding' ? { notResponding: true } :
 			{}),
 	})),
@@ -83,6 +85,7 @@ const pagination = {
 function getStatus(instance) {
 	if (instance.isSuspended) return 'Suspended';
 	if (instance.isBlocked) return 'Blocked';
+	if (instance.isSilenced) return 'Silenced'
 	if (instance.isNotResponding) return 'Error';
 	return 'Alive';
 }
diff --git a/packages/frontend/src/pages/admin/instance-block.vue b/packages/frontend/src/pages/admin/instance-block.vue
index 9a0f5e026b..35ee8a9379 100644
--- a/packages/frontend/src/pages/admin/instance-block.vue
+++ b/packages/frontend/src/pages/admin/instance-block.vue
@@ -5,14 +5,19 @@ SPDX-License-Identifier: AGPL-3.0-only
 
 <template>
 <MkStickyContainer>
-	<template #header><XHeader :actions="headerActions" :tabs="headerTabs"/></template>
-	<MkSpacer :contentMax="700" :marginMin="16" :marginMax="32">
+	<template #header><XHeader :actions="headerActions" v-model:tab="tab" :tabs="headerTabs"/></template>
+	<MkSpacer :contentMax="700" :marginMin="16" :marginMax="32" >
 		<FormSuspense :p="init">
-			<MkTextarea v-model="blockedHosts">
+			<MkTextarea v-if="tab === 'block'" v-model="blockedHosts">
 				<span>{{ i18n.ts.blockedInstances }}</span>
 				<template #caption>{{ i18n.ts.blockedInstancesDescription }}</template>
 			</MkTextarea>
-
+			<MkTextarea v-else-if="tab === 'silence'" v-model="silencedHosts" class="_formBlock">
+				<span>{{ i18n.ts.silencedInstances }}</span>
+				<template #caption>{{
+						i18n.ts.silencedInstancesDescription
+					}}</template>
+			</MkTextarea>
 			<MkButton primary @click="save"><i class="ti ti-device-floppy"></i> {{ i18n.ts.save }}</MkButton>
 		</FormSuspense>
 	</MkSpacer>
@@ -31,15 +36,20 @@ import { i18n } from '@/i18n.js';
 import { definePageMetadata } from '@/scripts/page-metadata.js';
 
 let blockedHosts: string = $ref('');
+let silencedHosts: string = $ref("");
+let tab = $ref("block");
 
 async function init() {
 	const meta = await os.api('admin/meta');
 	blockedHosts = meta.blockedHosts.join('\n');
+	silencedHosts = meta.silencedHosts.join('\n');
 }
 
 function save() {
 	os.apiWithDialog('admin/update-meta', {
 		blockedHosts: blockedHosts.split('\n') || [],
+		silencedHosts: silencedHosts.split("\n") || [],
+
 	}).then(() => {
 		fetchInstance();
 	});
@@ -47,7 +57,18 @@ function save() {
 
 const headerActions = $computed(() => []);
 
-const headerTabs = $computed(() => []);
+const headerTabs = $computed(() => [
+	{
+		key: "block",
+		title: i18n.ts.block,
+		icon: "ph-prohibit ph-bold ph-lg",
+	},
+	{
+		key: "silence",
+		title: i18n.ts.silence,
+		icon: "ph-eye-slash ph-bold ph-lg",
+	},
+]);
 
 definePageMetadata({
 	title: i18n.ts.instanceBlocking,
diff --git a/packages/frontend/src/pages/instance-info.vue b/packages/frontend/src/pages/instance-info.vue
index 2285e4c88e..dc9d4b9c6c 100644
--- a/packages/frontend/src/pages/instance-info.vue
+++ b/packages/frontend/src/pages/instance-info.vue
@@ -36,7 +36,8 @@ SPDX-License-Identifier: AGPL-3.0-only
 				<div class="_gaps_s">
 					<MkSwitch v-model="suspended" :disabled="!instance" @update:modelValue="toggleSuspend">{{ i18n.ts.stopActivityDelivery }}</MkSwitch>
 					<MkSwitch v-model="isBlocked" :disabled="!meta || !instance" @update:modelValue="toggleBlock">{{ i18n.ts.blockThisInstance }}</MkSwitch>
-					<MkButton @click="refreshMetadata"><i class="ti ti-refresh"></i> Refresh metadata</MkButton>
+                    <MkSwitch v-model="isSilenced" :disabled="!meta || !instance" @update:modelValue="toggleSilenced">{{ i18n.ts.silence }}</MkSwitch>
+                    <MkButton @click="refreshMetadata"><i class="ti ti-refresh"></i> Refresh metadata</MkButton>
 				</div>
 			</FormSection>
 
@@ -147,6 +148,7 @@ let meta = $ref<Misskey.entities.AdminInstanceMetadata | null>(null);
 let instance = $ref<Misskey.entities.Instance | null>(null);
 let suspended = $ref(false);
 let isBlocked = $ref(false);
+let isSilenced = $ref(false);
 let faviconUrl = $ref<string | null>(null);
 
 const usersPagination = {
@@ -169,7 +171,8 @@ async function fetch(): Promise<void> {
 	});
 	suspended = instance.isSuspended;
 	isBlocked = instance.isBlocked;
-	faviconUrl = getProxiedImageUrlNullable(instance.faviconUrl, 'preview') ?? getProxiedImageUrlNullable(instance.iconUrl, 'preview');
+    isSilenced = instance.isSilenced;
+    faviconUrl = getProxiedImageUrlNullable(instance.faviconUrl, 'preview') ?? getProxiedImageUrlNullable(instance.iconUrl, 'preview');
 }
 
 async function toggleBlock(): Promise<void> {
@@ -180,7 +183,14 @@ async function toggleBlock(): Promise<void> {
 		blockedHosts: isBlocked ? meta.blockedHosts.concat([host]) : meta.blockedHosts.filter(x => x !== host),
 	});
 }
-
+async function toggleSilenced(): Promise<void> {
+    if (!meta) throw new Error('No meta?');
+    if (!instance) throw new Error('No instance?');
+    const { host } = instance;
+    await os.api('admin/update-meta', {
+        silencedHosts: isSilenced ? meta.silencedHosts.concat([host]) : meta.silencedHosts.filter(x => x !== host),
+    });
+}
 async function toggleSuspend(): Promise<void> {
 	if (!instance) throw new Error('No instance?');
 	await os.api('admin/federation/update-instance', {
diff --git a/packages/misskey-js/src/entities.ts b/packages/misskey-js/src/entities.ts
index aed242d8aa..845dbed10c 100644
--- a/packages/misskey-js/src/entities.ts
+++ b/packages/misskey-js/src/entities.ts
@@ -385,6 +385,7 @@ export type InstanceMetadata = LiteInstanceMetadata | DetailedInstanceMetadata;
 export type AdminInstanceMetadata = DetailedInstanceMetadata & {
 	// TODO: There are more fields.
 	blockedHosts: string[];
+	silencedHosts: string[];
 	app192IconUrl: string | null;
 	app512IconUrl: string | null;
 	manifestJsonOverride: string;
@@ -544,6 +545,7 @@ export type Instance = {
 	lastCommunicatedAt: DateString;
 	isNotResponding: boolean;
 	isSuspended: boolean;
+	isSilenced: boolean;
 	isBlocked: boolean;
 	softwareName: string | null;
 	softwareVersion: string | null;