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TechnitiumSoftware / DnsServer

Technitium DNS Server
https://technitium.com/dns/
GNU General Public License v3.0
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Bug: truncated TXT records for relayed domains #143

Closed shawnkhall closed 4 years ago

shawnkhall commented 4 years ago

Using Technitium DNS Server 4.1

The following DNS request truncates the multi-line SPF/TXT record:

nslookup -type=txt spf.messagingengine.com 127.0.0.1

spf.messagingengine.com text =
    "v=spf1 ip4:66.111.4.25 ip4:66.111.4.26 ip4:66.111.4.27 ip4:66.111.4.28 ip4:66.111.4.29 ip4:66.111.4.221 ip4:66.111.4.222 ip4:66"`

This is what should be returned:

nslookup -type=txt spf.messagingengine.com 8.8.8.8

spf.messagingengine.com text =
    "v=spf1 ip4:66.111.4.25 ip4:66.111.4.26 ip4:66.111.4.27 ip4:66.111.4.28 ip4:66.111.4.29 ip4:66.111.4.221 ip4:66.111.4.222 ip4:66"
    ".111.4.224 ip4:66.111.4.225 ip4:66.111.4.229 ip4:66.111.4.230 ip4:64.147.123.17 ip4:64.147.123.18 ip4:64.147.123.19 ip4:64.147."
    "123.20 ip4:64.147.123.21 ip4:64.147.123.24 ip4:64.147.123.25 ip4:64.147.123.26 ip4:64.147.123.27 ip4:64.147.123.28 ip4:64.147.1"
    "23.29 -all"`

That's a huge difference and will result in errors if I use Technitium DNS for my email servers.

Don't get me wrong - their SPF record is ugly - but it's well-formed and should be respected as-is even though it's ugly.

ShreyasZare commented 4 years ago

Thanks for the feedback. This bug was already spotted and fixed here.

This change is deployed to dnsclient.net web app for testing and you can click here to see if the record is read correctly.

Next release coming in a couple of weeks will have the code changes for correctly reading the TXT records.

ShreyasZare commented 4 years ago

The issue has been fixed in the new release.