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From: Richard Tweed <rtweed@thoughtmachine.net>
Date: Fri, 12 Apr 2019 14:00:40 +0100
Message-ID: <CAG_gbDAh05r6GUoSN3tUCGMzYt3kdZpshAFidRBHFgzBuTCebQ@mail.gmail.com>
Subject: [alpine-user] Support request - Force DNS requests to go over TCP
To: alpine-user@lists.alpinelinux.org
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Hi all,

I've run into a situation where I need DNS resolution to always be over TCP
rather than UDP due to AWS dropping DNS packets frequently enough to be a
problem. On glibc based environments I can use the use-vc option in the
resolv.conf file.
http://man7.org/linux/man-pages/man5/resolv.conf.5.html
On Alpine this doesn't seem to be supported and I would love to hear any
suggestions about achieving this behaviour.

Feel free to CC me on this discussion

Many thanks,

--=20

Richard Finlay Tweed

--=20




Thought Machine Group a limited company registered in England & Wales.

Registered number: 11114277.=C2=A0
Registered Office:=C2=A05 New Street Square,=20
London EC4A 3TW=20
<https://maps.google.com/?q=3D5+New+Street+Square,+London+EC4A+3TW&entry=3D=
gmail&source=3Dg>.



The content of this email is confidential and intended for the recipient=20
specified in message only. It is strictly forbidden to share any part of=20
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<div dir=3D"ltr">Hi all,<div><br></div><div>I&#39;ve run into a situation w=
here I need DNS resolution to always be over TCP rather than UDP due to AWS=
 dropping DNS packets frequently enough to be a problem. On glibc based env=
ironments I can use the use-vc option in the resolv.conf file.=C2=A0<br><a =
href=3D"http://man7.org/linux/man-pages/man5/resolv.conf.5.html" target=3D"=
_blank">http://man7.org/linux/man-pages/man5/resolv.conf.5.html</a><br clea=
r=3D"all"><div>On Alpine this doesn&#39;t seem to be supported and I would =
love to hear any suggestions about achieving this behaviour.<br><br>Feel fr=
ee to CC me on this discussion<br><br></div><div>Many thanks,</div></div><d=
iv><br></div>-- <br><div dir=3D"ltr" class=3D"gmail_signature" data-smartma=
il=3D"gmail_signature"><div dir=3D"ltr"><div><div dir=3D"ltr"><span><p dir=
=3D"ltr" style=3D"line-height:1.38;margin-top:0pt;margin-bottom:10pt"><span=
 style=3D"background-color:transparent;color:rgb(0,0,0);font-family:Arial;f=
ont-size:12pt;white-space:pre-wrap">Richard Finlay Tweed</span><br></p><p d=
ir=3D"ltr" style=3D"line-height:1.38;margin-top:0pt;margin-bottom:0pt"><br>=
</p></span></div></div></div></div></div>

<br>
<div style=3D"font-family:arial,sans-serif;font-size:12.8px;background-colo=
r:rgb(255,255,255);color:rgb(80,0,80)"><img src=3D"https://ci4.googleuserco=
ntent.com/proxy/-mLbb7BUDvhPg4cAanUHXqKeyCu8a5tSujknlPTBqKIuZwITHaVjzPa5X9W=
J1sRQsnrSxIZptkHUtISWPxURbjhAiY6Z6XB-sz2IzguKop8TG4IMXKewx6gaNxDoW3UxzW1UeE=
ioTltL6yJLZO0K4tH97E9s3ykHt2xgk0z35jwuu_nZiBTse6qz_oZ7tV-gkeQzTybzePb5IYcaq=
BzuBA=3Ds0-d-e1-ft#https://docs.google.com/uc?export=3Ddownload&amp;id=3D1B=
4AgxA3qV6xhJUJg8KGzg2-bU-Qa4Kt9&amp;revid=3D0B3AGZEUNjoVtWmc1QURYTTMzbDYrRE=
JWMkFvL2U2Nmd0S0lzPQ" width=3D"46" height=3D"96" style=3D"color:rgb(34,34,3=
4);font-family:arial,helvetica,sans-serif;font-size:large"><font size=3D"2"=
 face=3D"arial, helvetica, sans-serif" color=3D"#444444"><br></font></div><=
div style=3D"font-family:arial,sans-serif;font-size:12.8px;background-color=
:rgb(255,255,255);color:rgb(80,0,80)"><br></div><div style=3D"font-family:a=
rial,sans-serif;font-size:12.8px;background-color:rgb(255,255,255);color:rg=
b(80,0,80)"><font size=3D"1" face=3D"arial, helvetica, sans-serif" color=3D=
"#444444">Thought Machine Group a limited company registered in England &am=
p; Wales.</font></div><div style=3D"font-family:arial,sans-serif;font-size:=
12.8px;background-color:rgb(255,255,255);color:rgb(80,0,80)"><font size=3D"=
1" face=3D"arial, helvetica, sans-serif" color=3D"#444444">Registered numbe=
r: 11114277.=C2=A0</font></div><div style=3D"font-family:arial,sans-serif;f=
ont-size:12.8px;background-color:rgb(255,255,255);color:rgb(80,0,80)"><font=
 size=3D"1" face=3D"arial, helvetica, sans-serif" color=3D"#444444">Registe=
red Office:=C2=A0<a href=3D"https://maps.google.com/?q=3D5+New+Street+Squar=
e,+London+EC4A+3TW&amp;entry=3Dgmail&amp;source=3Dg" style=3D"color:rgb(17,=
85,204)" target=3D"_blank">5 New Street Square, London EC4A 3TW</a>.</font>=
</div><div style=3D"font-family:arial,sans-serif;font-size:12.8px;backgroun=
d-color:rgb(255,255,255);color:rgb(80,0,80)"><font size=3D"1" face=3D"arial=
, helvetica, sans-serif" color=3D"#444444"><br></font></div><div style=3D"b=
ackground-color:rgb(255,255,255)"><font color=3D"#444444" face=3D"Arial" si=
ze=3D"1"><span style=3D"white-space:pre-wrap">The content of this email is =
confidential and intended for the recipient specified in message only. It i=
s strictly forbidden to share any part of this message with any third party=
, without a written consent of the sender. If you received this message by =
mistake, please reply to this message and follow with its deletion, so that=
 we can ensure such a mistake does not occur in the future.</span></font></=
div>
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