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Multiple parent nodes to one or two child nodes (mail)

Comments

9 comments

  • cPRex Jurassic Moderator
    Hey there! The short answer is "not yet" - according to our docs at cPanel Linked Nodes Guide | cPanel & WHM Documentation "We do not currently support configurations that link more than one parent node to a single child node." ELevate has no concept of this process as that is just for the local operating system itself. In that same guide I linked above, we say this about the mail traffic: In most cases, all IMAP, POP3, and SMTP traffic for distributed cPanel accounts goes to the mail child node. However, if this traffic arrives at the parent node (for example, cached DNS lookups), the parent node will: Create proxy IMAP and POP3 connections to the mail child node. Reroute SMTP mail delivery to the mail child node.
    so you'd want your mail processing tools to be on the child node.
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  • WebJIVE
    This is a great question and we're close to digging deeper into this as well. Questions I still have: 1. Does the parent or child node handle spam filtering (SPAMAssasign, ASSP, Mailscanner, etc.) at the parent or child mail node? 2. Do we need to continue using Imunify360 on the mail node as well as the parent node or would the cPanel products be good enough to protect the node? I realize that a mail-node is just a designation when installing a cPanel server vs the DNS only version which is why I have plugin questions. It comes down to can you install plugins on the mail node and if so, what are you limited to or should be considered when setting a node up? Thanks!
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  • cPRex Jurassic Moderator
    Hey there! I believe this section of our documentation will answer both of those questions, with the bold being my addition: Distributed accounts on a linked mail child node In most cases, all IMAP, POP3, and SMTP traffic for distributed cPanel accounts goes to the mail child node. However, if this traffic arrives at the parent node (for example, cached DNS lookups), the parent node will: Create proxy IMAP and POP3 connections to the mail child node. Reroute SMTP mail delivery to the mail child node.
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  • WebJIVE
    Thanks for the doc links. I'm still scratching my head on how SPAM would be handled?
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  • cPRex Jurassic Moderator
    The configuration changes happen on the parent in cPanel, but the spam processing happens on the child machine.
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  • WebJIVE
    The configuration changes happen on the parent in cPanel, but the spam processing happens on the child machine.

    This creates quite a problem for handling SPAM with SPAMAssasign or ASSP or other then since you can't install SPAM software on nodes?
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  • cPRex Jurassic Moderator
    SpamAssassin still works as normal, although at this point you are correct that you wouldn't be able to install third-party tools.
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  • WebJIVE
    SpamAssassin still works as normal, although at this point you are correct that you wouldn't be able to install third-party tools.

    So we have to use Spam Assassin until this gets opened up to plugins?
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  • cPRex Jurassic Moderator
    At this point, yes. Due to the relationship between the parent and child and how everything gets handled, and the fact this is still a bit new, customization options are limited or non-existent.
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