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	<title>DNS &#8211; Miroslav Šraga</title>
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	<description>Sdílím své zkušenosti s Microsoft 365 a Azure</description>
	<lastBuildDate>Sat, 31 Aug 2024 13:55:19 +0000</lastBuildDate>
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		<title>Hromadné vygenerování CNAME záznamů pro DKIM</title>
		<link>https://www.sraga.cz/hromadne-vygenerovani-cname-zaznamu-pro-dkim/</link>
					<comments>https://www.sraga.cz/hromadne-vygenerovani-cname-zaznamu-pro-dkim/#respond</comments>
		
		<dc:creator><![CDATA[Miroslav Šraga]]></dc:creator>
		<pubDate>Sat, 31 Aug 2024 13:55:19 +0000</pubDate>
				<category><![CDATA[Exchange]]></category>
		<category><![CDATA[Microsoft 365]]></category>
		<category><![CDATA[PowerShell]]></category>
		<category><![CDATA[CNAME]]></category>
		<category><![CDATA[DKIM]]></category>
		<category><![CDATA[DNS]]></category>
		<guid isPermaLink="false">https://www.sraga.cz/?p=706</guid>

					<description><![CDATA[V rámci nasazování cloudových služeb se setkávám s potřebou hromadně vygenerovat CNAME záznamy pro DKIM. Tohoto lze poměrně jednoduše dosáhnout pomocí Exchange Online PowerShellu # pripojeni k Exchange Online PowerShell Connect-ExchangeOnline # nacteni domen $domains = Get-AcceptedDomain # vypis domen $domains # vytvoreni DKIM CNAME zaznamu pro vsechny domeny foreach ($domain in $domains) { $domainName ... <a title="Hromadné vygenerování CNAME záznamů pro DKIM" class="read-more" href="https://www.sraga.cz/hromadne-vygenerovani-cname-zaznamu-pro-dkim/" aria-label="Číst více o Hromadné vygenerování CNAME záznamů pro DKIM">Číst dál</a>]]></description>
										<content:encoded><![CDATA[		<div data-elementor-type="wp-post" data-elementor-id="706" class="elementor elementor-706" data-elementor-post-type="post">
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									<p>V rámci nasazování cloudových služeb se setkávám s potřebou hromadně vygenerovat CNAME záznamy pro DKIM. Tohoto lze poměrně jednoduše dosáhnout pomocí Exchange Online PowerShellu</p>								</div>
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					<pre class='line-numbers theme-okaidia' data-show-toolbar='yes'><code class='language-powershell'># pripojeni k Exchange Online PowerShell
Connect-ExchangeOnline</code></pre>				</div>
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																<a href="https://www.sraga.cz/wp-content/uploads/2024/08/EXOL-DKIM-1-Connect-ExchangeOnline.png" data-elementor-open-lightbox="yes" data-elementor-lightbox-title="EXOL-DKIM-1-Connect-ExchangeOnline" data-e-action-hash="#elementor-action%3Aaction%3Dlightbox%26settings%3DeyJpZCI6NzExLCJ1cmwiOiJodHRwczpcL1wvd3d3LnNyYWdhLmN6XC93cC1jb250ZW50XC91cGxvYWRzXC8yMDI0XC8wOFwvRVhPTC1ES0lNLTEtQ29ubmVjdC1FeGNoYW5nZU9ubGluZS5wbmcifQ%3D%3D">
							<img fetchpriority="high" decoding="async" width="768" height="139" src="https://www.sraga.cz/wp-content/uploads/2024/08/EXOL-DKIM-1-Connect-ExchangeOnline-768x139.png" class="attachment-medium_large size-medium_large wp-image-711" alt="pripojeni k Exchange Online PowerShell Connect-ExchangeOnline" srcset="https://www.sraga.cz/wp-content/uploads/2024/08/EXOL-DKIM-1-Connect-ExchangeOnline-768x139.png 768w, https://www.sraga.cz/wp-content/uploads/2024/08/EXOL-DKIM-1-Connect-ExchangeOnline-300x54.png 300w, https://www.sraga.cz/wp-content/uploads/2024/08/EXOL-DKIM-1-Connect-ExchangeOnline-1024x185.png 1024w, https://www.sraga.cz/wp-content/uploads/2024/08/EXOL-DKIM-1-Connect-ExchangeOnline-1536x278.png 1536w, https://www.sraga.cz/wp-content/uploads/2024/08/EXOL-DKIM-1-Connect-ExchangeOnline.png 1538w" sizes="(max-width: 768px) 100vw, 768px" />								</a>
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					<pre class='line-numbers theme-okaidia' data-show-toolbar='yes'><code class='language-powershell'># nacteni domen
$domains = Get-AcceptedDomain

# vypis domen
$domains</code></pre>				</div>
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																<a href="https://www.sraga.cz/wp-content/uploads/2024/08/EXOL-DKIM-2-Get-AcceptedDomain.png" data-elementor-open-lightbox="yes" data-elementor-lightbox-title="EXOL-DKIM-2-Get-AcceptedDomain" data-e-action-hash="#elementor-action%3Aaction%3Dlightbox%26settings%3DeyJpZCI6NzEwLCJ1cmwiOiJodHRwczpcL1wvd3d3LnNyYWdhLmN6XC93cC1jb250ZW50XC91cGxvYWRzXC8yMDI0XC8wOFwvRVhPTC1ES0lNLTItR2V0LUFjY2VwdGVkRG9tYWluLnBuZyJ9">
							<img decoding="async" width="768" height="191" src="https://www.sraga.cz/wp-content/uploads/2024/08/EXOL-DKIM-2-Get-AcceptedDomain-768x191.png" class="attachment-medium_large size-medium_large wp-image-710" alt="Get-AcceptedDomain" srcset="https://www.sraga.cz/wp-content/uploads/2024/08/EXOL-DKIM-2-Get-AcceptedDomain-768x191.png 768w, https://www.sraga.cz/wp-content/uploads/2024/08/EXOL-DKIM-2-Get-AcceptedDomain-300x75.png 300w, https://www.sraga.cz/wp-content/uploads/2024/08/EXOL-DKIM-2-Get-AcceptedDomain-1024x255.png 1024w, https://www.sraga.cz/wp-content/uploads/2024/08/EXOL-DKIM-2-Get-AcceptedDomain.png 1077w" sizes="(max-width: 768px) 100vw, 768px" />								</a>
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					<pre class='line-numbers theme-okaidia' data-show-toolbar='yes'><code class='language-powershell'># vytvoreni DKIM CNAME zaznamu pro vsechny domeny
foreach ($domain in $domains) {
    $domainName = $domain.DomainName
    New-DkimSigningConfig -DomainName $domainName -Enabled $true
}</code></pre>				</div>
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																<a href="https://www.sraga.cz/wp-content/uploads/2024/08/EXOL-DKIM-3-New-DkimSigningConfig.png" data-elementor-open-lightbox="yes" data-elementor-lightbox-title="EXOL-DKIM-3-New-DkimSigningConfig" data-e-action-hash="#elementor-action%3Aaction%3Dlightbox%26settings%3DeyJpZCI6NzA5LCJ1cmwiOiJodHRwczpcL1wvd3d3LnNyYWdhLmN6XC93cC1jb250ZW50XC91cGxvYWRzXC8yMDI0XC8wOFwvRVhPTC1ES0lNLTMtTmV3LURraW1TaWduaW5nQ29uZmlnLnBuZyJ9">
							<img decoding="async" width="768" height="247" src="https://www.sraga.cz/wp-content/uploads/2024/08/EXOL-DKIM-3-New-DkimSigningConfig-768x247.png" class="attachment-medium_large size-medium_large wp-image-709" alt="New-DkimSigningConfig" srcset="https://www.sraga.cz/wp-content/uploads/2024/08/EXOL-DKIM-3-New-DkimSigningConfig-768x247.png 768w, https://www.sraga.cz/wp-content/uploads/2024/08/EXOL-DKIM-3-New-DkimSigningConfig-300x97.png 300w, https://www.sraga.cz/wp-content/uploads/2024/08/EXOL-DKIM-3-New-DkimSigningConfig-1024x330.png 1024w, https://www.sraga.cz/wp-content/uploads/2024/08/EXOL-DKIM-3-New-DkimSigningConfig-1536x494.png 1536w, https://www.sraga.cz/wp-content/uploads/2024/08/EXOL-DKIM-3-New-DkimSigningConfig.png 1796w" sizes="(max-width: 768px) 100vw, 768px" />								</a>
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					<pre class='line-numbers theme-okaidia' data-show-toolbar='yes'><code class='language-powershell'># zobrazeni vsech DKIM CNAME zaznamu
foreach ($domain in $domains) {
    $dkimConfig = Get-DkimSigningConfig -Identity $domain.DomainName
    Write-Output &quot;Domain: $($domain.DomainName)&quot;
    Write-Output &quot;Selector1 CNAME: $($dkimConfig.Selector1CNAME)&quot;
    Write-Output &quot;Selector2 CNAME: $($dkimConfig.Selector2CNAME)&quot;
    Write-Output &quot;&quot;
}</code></pre>				</div>
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																<a href="https://www.sraga.cz/wp-content/uploads/2024/08/EXOL-DKIM-4-Get-DkimSigningConfig.png" data-elementor-open-lightbox="yes" data-elementor-lightbox-title="EXOL-DKIM-4-Get-DkimSigningConfig" data-e-action-hash="#elementor-action%3Aaction%3Dlightbox%26settings%3DeyJpZCI6NzA4LCJ1cmwiOiJodHRwczpcL1wvd3d3LnNyYWdhLmN6XC93cC1jb250ZW50XC91cGxvYWRzXC8yMDI0XC8wOFwvRVhPTC1ES0lNLTQtR2V0LURraW1TaWduaW5nQ29uZmlnLnBuZyJ9">
							<img loading="lazy" decoding="async" width="602" height="334" src="https://www.sraga.cz/wp-content/uploads/2024/08/EXOL-DKIM-4-Get-DkimSigningConfig.png" class="attachment-medium_large size-medium_large wp-image-708" alt="Get-DkimSigningConfig" srcset="https://www.sraga.cz/wp-content/uploads/2024/08/EXOL-DKIM-4-Get-DkimSigningConfig.png 602w, https://www.sraga.cz/wp-content/uploads/2024/08/EXOL-DKIM-4-Get-DkimSigningConfig-300x166.png 300w" sizes="(max-width: 602px) 100vw, 602px" />								</a>
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									<p>Výstup z obrazovky stačí zkopírovat a zaslat správci domén, aby správně nastavil selector1 a selector2 na jednotlivých doménách a následně DKIM aktivovat.</p>								</div>
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		<item>
		<title>Vytvoření DMARC záznamu pro fallback doménu onmicrosoft.com</title>
		<link>https://www.sraga.cz/vytvoreni-dmarc-zaznamu-domenu-onmicrosoft-com/</link>
					<comments>https://www.sraga.cz/vytvoreni-dmarc-zaznamu-domenu-onmicrosoft-com/#respond</comments>
		
		<dc:creator><![CDATA[c]]></dc:creator>
		<pubDate>Wed, 07 Feb 2024 10:55:09 +0000</pubDate>
				<category><![CDATA[Bezpečnost]]></category>
		<category><![CDATA[DMARC]]></category>
		<category><![CDATA[DNS]]></category>
		<category><![CDATA[Exchange]]></category>
		<category><![CDATA[SPAM]]></category>
		<guid isPermaLink="false">https://www.sraga.cz/?p=151</guid>

					<description><![CDATA[DMARC je protokol pro ověřování e-mailů. Je navržen tak, aby umožnil majitelům e-mailových domén chránit svou doménu před neoprávněným použitím, což se běžně nazývá e-mailový spoofing. DMARC funguje společně se Sender Policy Framework (SPF) a DomainKeys Identified Mail (DKIM) pro ověření odesílatelů pošty. Věděli jste že DMARC záznam můžete nastavit také pro výchozí doménu onmicrosoft.com, ... <a title="Vytvoření DMARC záznamu pro fallback doménu onmicrosoft.com" class="read-more" href="https://www.sraga.cz/vytvoreni-dmarc-zaznamu-domenu-onmicrosoft-com/" aria-label="Číst více o Vytvoření DMARC záznamu pro fallback doménu onmicrosoft.com">Číst dál</a>]]></description>
										<content:encoded><![CDATA[		<div data-elementor-type="wp-post" data-elementor-id="151" class="elementor elementor-151" data-elementor-post-type="post">
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									<p>DMARC je protokol pro ověřování e-mailů. Je navržen tak, aby umožnil <strong>majitelům e-mailových domén chránit svou doménu před neoprávněným použitím</strong>, což se běžně nazývá e-mailový spoofing. DMARC funguje společně se Sender Policy Framework (SPF) a DomainKeys Identified Mail (DKIM) pro ověření odesílatelů pošty.</p>								</div>
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						<span class="elementor-alert-title">Věděli jste</span>
			
						<span class="elementor-alert-description">že DMARC záznam můžete nastavit také pro výchozí doménu onmicrosoft.com, takzvanou fallback doménu nebo také Microsoft Online Email Routing Address?</span>
			
			
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									<ol><li>Otevřete si <a href="https://admin.microsoft.com" target="_blank" rel="noopener">Microsoft 365 Admin Centrum</a></li><li>Rozbalte <strong>Settings</strong> (Nastavení)</li><li>Klikněte na <strong>Domains</strong> (Domény)</li><li>Klikněte na vaši <strong>.onmicrosoft.com doménu</strong></li></ol>								</div>
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																<a href="https://www.sraga.cz/wp-content/uploads/2024/02/DMARC-onmicrosoft_1.png" data-elementor-open-lightbox="yes" data-elementor-lightbox-title="DMARC-onmicrosoft_1" data-e-action-hash="#elementor-action%3Aaction%3Dlightbox%26settings%3DeyJpZCI6MTU2LCJ1cmwiOiJodHRwczpcL1wvd3d3LnNyYWdhLmN6XC93cC1jb250ZW50XC91cGxvYWRzXC8yMDI0XC8wMlwvRE1BUkMtb25taWNyb3NvZnRfMS5wbmcifQ%3D%3D">
							<img loading="lazy" decoding="async" width="768" height="677" src="https://www.sraga.cz/wp-content/uploads/2024/02/DMARC-onmicrosoft_1-768x677.png" class="attachment-medium_large size-medium_large wp-image-156" alt="DMARC záznam pro doménu onmicrosoft.com" srcset="https://www.sraga.cz/wp-content/uploads/2024/02/DMARC-onmicrosoft_1-768x677.png 768w, https://www.sraga.cz/wp-content/uploads/2024/02/DMARC-onmicrosoft_1-300x265.png 300w, https://www.sraga.cz/wp-content/uploads/2024/02/DMARC-onmicrosoft_1-1024x903.png 1024w, https://www.sraga.cz/wp-content/uploads/2024/02/DMARC-onmicrosoft_1.png 1169w" sizes="(max-width: 768px) 100vw, 768px" />								</a>
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									<p>5. Klikněte na záložku <strong>DNS Recods</strong> (DNS záznamy)<br />6. Klikněte na <strong>+Add record</strong> (Přidat záznamú</p>								</div>
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																<a href="https://www.sraga.cz/wp-content/uploads/2024/02/DMARC-onmicrosoft_2.png" data-elementor-open-lightbox="yes" data-elementor-lightbox-title="DMARC-onmicrosoft_2" data-e-action-hash="#elementor-action%3Aaction%3Dlightbox%26settings%3DeyJpZCI6MTU1LCJ1cmwiOiJodHRwczpcL1wvd3d3LnNyYWdhLmN6XC93cC1jb250ZW50XC91cGxvYWRzXC8yMDI0XC8wMlwvRE1BUkMtb25taWNyb3NvZnRfMi5wbmcifQ%3D%3D">
							<img loading="lazy" decoding="async" width="768" height="677" src="https://www.sraga.cz/wp-content/uploads/2024/02/DMARC-onmicrosoft_2-768x677.png" class="attachment-medium_large size-medium_large wp-image-155" alt="DMARC záznam pro doménu onmicrosoft.com" srcset="https://www.sraga.cz/wp-content/uploads/2024/02/DMARC-onmicrosoft_2-768x677.png 768w, https://www.sraga.cz/wp-content/uploads/2024/02/DMARC-onmicrosoft_2-300x265.png 300w, https://www.sraga.cz/wp-content/uploads/2024/02/DMARC-onmicrosoft_2-1024x903.png 1024w, https://www.sraga.cz/wp-content/uploads/2024/02/DMARC-onmicrosoft_2.png 1169w" sizes="(max-width: 768px) 100vw, 768px" />								</a>
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									<p>7. Vyberte typ záznamu TXT<br />8. Název záznamu _dmarc<br />9. Hodnota záznamu dle potřeby (none, quarantine, reject)</p><p>Více informací o<a href="https://www.cloudpartner.cz/dmarc-jak-zlepsit-dorucitelnost-vasich-e-mailu/" target="_blank" rel="noopener"> nastavení DMARC záznamu</a> můžete najít třeba <a href="https://www.cloudpartner.cz/dmarc-jak-zlepsit-dorucitelnost-vasich-e-mailu/" target="_blank" rel="noopener">zde</a>.</p><p>10. Nastavení uložte pomocí tlačítka <strong>Save</strong> (Uložit)</p>								</div>
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			<pre data-line="" class="highlight-height language-javascript line-numbers">
				<code readonly="true" class="language-javascript">
					<xmp>v=DMARC1; p=quarantine; pct=100

v=DMARC1; p=reject; pct=100</xmp>
				</code>
			</pre>
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																<a href="https://www.sraga.cz/wp-content/uploads/2024/02/DMARC-onmicrosoft_3.png" data-elementor-open-lightbox="yes" data-elementor-lightbox-title="DMARC-onmicrosoft_3" data-e-action-hash="#elementor-action%3Aaction%3Dlightbox%26settings%3DeyJpZCI6MTU0LCJ1cmwiOiJodHRwczpcL1wvd3d3LnNyYWdhLmN6XC93cC1jb250ZW50XC91cGxvYWRzXC8yMDI0XC8wMlwvRE1BUkMtb25taWNyb3NvZnRfMy5wbmcifQ%3D%3D">
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									<p>11. DMARC záznam je vytvořen. Zkontrolovat si jej můžete například pomocí nástroje <a href="https://www.mxtoolbox.com" target="_blank" rel="noopener">mxtoolbox.com</a></p>								</div>
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