Date: Wed, 8 May 2024 23:19:59 +0200 From: Dirk-Willem van Gulik <dirkx@webweaving.org> To: Lexi Winter <lexi@le-fay.org> Cc: FreeBSD Hackers <freebsd-hackers@freebsd.org> Subject: Re: IPv6 and IPv4 combined rules in pf.conf Message-ID: <5258A000-3483-467F-8FE9-B3F986D62BB3@webweaving.org> In-Reply-To: <6005DECF-10AA-487F-8F95-317B4227E988@webweaving.org> References: <0C18B410-E90B-4295-B09E-43B48F9191A4@webweaving.org> <ZjvdI2LzAYEIMjCy@ilythia.eden.le-fay.org> <6005DECF-10AA-487F-8F95-317B4227E988@webweaving.org>
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--Apple-Mail=_E7A94B88-4767-4051-AD41-387F9DEDB4CA
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On 8 May 2024, at 22:41, Dirk-Willem van Gulik <dirkx@webweaving.org> =
wrote:
>=20
>> On 8 May 2024, at 22:14, Lexi Winter <lexi@le-fay.org> wrote:
>>=20
>> Dirk-Willem van Gulik:
>>> For dual stack hosts; with both an IPv4 and IPv6 CIDR that they are
>>> listening to - is there a recommended way to setup pf.conf to avoid
>>> mistakes/duplication ?
>>=20
>>> To avoid duplication in constructs such as:
>>=20
>>> # Foo app servers
>>> foobarserver_host4=3D231.17.X.Y
>>> foobarserver_host6=3Dfe80::5246:=E2=80=A6
>>>=20
>>> # Load balancers - direct or via tun0 in post/fail-back=20
>>> bar_net=3DX.Y.Z.Z #=20
>>> bar_net6=3Dfe80::5246:=E2=80=A6 #=20
>>> =E2=80=A6
>>>=20
>>> pass in on { tun0, $ext_if } proto udp from $bar_net to =
$foobarserver_host4 port 2194 keep state
>>> pass in on { tun0, $ext_if } proto udp6 from bar_net6 $var to =
$foobarserver_host6 port 2194 keep state
>>=20
>>> Is there some recommended way of doing this in stock FreeBSD ? Or =
does
>>> one usually end up with some sort of macro/generate style solution ?
>>=20
>> i would suggest something like this:
>>=20
>> table <foobarserver> {
>> 231.17.X.Y
>> fe80::5246:...
>> }
>>=20
>> table <bar-net> {
>> ...
>> }
>>=20
>> pass on { tun0, $ext_if } proto udp from <bar-net> \
>> to <foobarserver> port 2194
>=20
> Ok - excellent - =C8=99o one can mix IPv4 and IPv6 in a list - and =
=E2=80=98udp=E2=80=99 no longer needs to be =E2=80=98udp6=E2=80=99 (and =
same for tcp6 and icmp6 v.s. tcp/icmp_=E2=80=94 pf guesses this right =
based on the address ?
Ignore - that works perfectly - with inet/inet6 thrown in where I need =
to make the distinction.
Thanks !
Dw.
--Apple-Mail=_E7A94B88-4767-4051-AD41-387F9DEDB4CA
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charset=utf-8
<html><head><meta http-equiv=3D"content-type" content=3D"text/html; =
charset=3Dutf-8"></head><body style=3D"overflow-wrap: break-word; =
-webkit-nbsp-mode: space; line-break: after-white-space;">On 8 May 2024, =
at 22:41, Dirk-Willem van Gulik <dirkx@webweaving.org> =
wrote:<div><blockquote type=3D"cite"><div><div style=3D"caret-color: =
rgb(0, 0, 0); font-family: Helvetica; font-size: 12px; font-style: =
normal; font-variant-caps: normal; font-weight: 400; letter-spacing: =
normal; text-align: start; text-indent: 0px; text-transform: none; =
white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; =
text-decoration: none;"><br><blockquote type=3D"cite"><div>On 8 May =
2024, at 22:14, Lexi Winter <lexi@le-fay.org> wrote:</div><br =
class=3D"Apple-interchange-newline"><div><span style=3D"caret-color: =
rgb(0, 0, 0); font-family: Helvetica; font-size: 12px; font-style: =
normal; font-variant-caps: normal; font-weight: 400; letter-spacing: =
normal; text-align: start; text-indent: 0px; text-transform: none; =
white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; =
text-decoration: none; float: none; display: inline =
!important;">Dirk-Willem van Gulik:</span><br style=3D"caret-color: =
rgb(0, 0, 0); font-family: Helvetica; font-size: 12px; font-style: =
normal; font-variant-caps: normal; font-weight: 400; letter-spacing: =
normal; text-align: start; text-indent: 0px; text-transform: none; =
white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; =
text-decoration: none;"><blockquote type=3D"cite" style=3D"font-family: =
Helvetica; font-size: 12px; font-style: normal; font-variant-caps: =
normal; font-weight: 400; letter-spacing: normal; text-align: start; =
text-indent: 0px; text-transform: none; white-space: normal; =
word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration: =
none;">For dual stack hosts; with both an IPv4 and IPv6 CIDR that they =
are<br>listening to - is there a recommended way to setup pf.conf to =
avoid<br>mistakes/duplication ?<br></blockquote><br style=3D"caret-color: =
rgb(0, 0, 0); font-family: Helvetica; font-size: 12px; font-style: =
normal; font-variant-caps: normal; font-weight: 400; letter-spacing: =
normal; text-align: start; text-indent: 0px; text-transform: none; =
white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; =
text-decoration: none;"><blockquote type=3D"cite" style=3D"font-family: =
Helvetica; font-size: 12px; font-style: normal; font-variant-caps: =
normal; font-weight: 400; letter-spacing: normal; text-align: start; =
text-indent: 0px; text-transform: none; white-space: normal; =
word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration: =
none;">To avoid duplication in constructs such as:<br></blockquote><br =
style=3D"caret-color: rgb(0, 0, 0); font-family: Helvetica; font-size: =
12px; font-style: normal; font-variant-caps: normal; font-weight: 400; =
letter-spacing: normal; text-align: start; text-indent: 0px; =
text-transform: none; white-space: normal; word-spacing: 0px; =
-webkit-text-stroke-width: 0px; text-decoration: none;"><blockquote =
type=3D"cite" style=3D"font-family: Helvetica; font-size: 12px; =
font-style: normal; font-variant-caps: normal; font-weight: 400; =
letter-spacing: normal; text-align: start; text-indent: 0px; =
text-transform: none; white-space: normal; word-spacing: 0px; =
-webkit-text-stroke-width: 0px; text-decoration: none;"><span =
class=3D"Apple-tab-span" style=3D"white-space: pre;"> </span># Foo app =
servers<br><span class=3D"Apple-tab-span" style=3D"white-space: pre;"> =
</span>foobarserver_host4=3D231.17.X.Y<br><span class=3D"Apple-tab-span" =
style=3D"white-space: pre;"> =
</span>foobarserver_host6=3Dfe80::5246:=E2=80=A6<br><br><span =
class=3D"Apple-tab-span" style=3D"white-space: pre;"> </span># Load =
balancers - direct or via tun0 in post/fail-back<span =
class=3D"Apple-converted-space"> </span><br><span =
class=3D"Apple-tab-span" style=3D"white-space: pre;"> =
</span>bar_net=3DX.Y.Z.Z #<span =
class=3D"Apple-converted-space"> </span><br><span =
class=3D"Apple-tab-span" style=3D"white-space: pre;"> =
</span>bar_net6=3Dfe80::5246:=E2=80=A6 #<span =
class=3D"Apple-converted-space"> </span><br><span =
class=3D"Apple-tab-span" style=3D"white-space: pre;"> =
</span>=E2=80=A6<br><br><span class=3D"Apple-tab-span" =
style=3D"white-space: pre;"> </span>pass in on { tun0, $ext_if } =
proto udp from $bar_net to $foobarserver_host4 port 2194 =
keep state<br><span class=3D"Apple-tab-span" style=3D"white-space: =
pre;"> </span>pass in on { tun0, $ext_if } proto udp6 from =
bar_net6 $var to $foobarserver_host6 port 2194 keep =
state<br></blockquote><br style=3D"caret-color: rgb(0, 0, 0); =
font-family: Helvetica; font-size: 12px; font-style: normal; =
font-variant-caps: normal; font-weight: 400; letter-spacing: normal; =
text-align: start; text-indent: 0px; text-transform: none; white-space: =
normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; =
text-decoration: none;"><blockquote type=3D"cite" style=3D"font-family: =
Helvetica; font-size: 12px; font-style: normal; font-variant-caps: =
normal; font-weight: 400; letter-spacing: normal; text-align: start; =
text-indent: 0px; text-transform: none; white-space: normal; =
word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration: =
none;">Is there some recommended way of doing this in stock FreeBSD ? Or =
does<br>one usually end up with some sort of macro/generate style =
solution ?<br></blockquote><br style=3D"caret-color: rgb(0, 0, 0); =
font-family: Helvetica; font-size: 12px; font-style: normal; =
font-variant-caps: normal; font-weight: 400; letter-spacing: normal; =
text-align: start; text-indent: 0px; text-transform: none; white-space: =
normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; =
text-decoration: none;"><span style=3D"caret-color: rgb(0, 0, 0); =
font-family: Helvetica; font-size: 12px; font-style: normal; =
font-variant-caps: normal; font-weight: 400; letter-spacing: normal; =
text-align: start; text-indent: 0px; text-transform: none; white-space: =
normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; =
text-decoration: none; float: none; display: inline !important;">i would =
suggest something like this:</span><br style=3D"caret-color: rgb(0, 0, =
0); font-family: Helvetica; font-size: 12px; font-style: normal; =
font-variant-caps: normal; font-weight: 400; letter-spacing: normal; =
text-align: start; text-indent: 0px; text-transform: none; white-space: =
normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; =
text-decoration: none;"><br style=3D"caret-color: rgb(0, 0, 0); =
font-family: Helvetica; font-size: 12px; font-style: normal; =
font-variant-caps: normal; font-weight: 400; letter-spacing: normal; =
text-align: start; text-indent: 0px; text-transform: none; white-space: =
normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; =
text-decoration: none;"><span class=3D"Apple-tab-span" =
style=3D"caret-color: rgb(0, 0, 0); font-family: Helvetica; font-size: =
12px; font-style: normal; font-variant-caps: normal; font-weight: 400; =
letter-spacing: normal; text-align: start; text-indent: 0px; =
text-transform: none; white-space: pre; word-spacing: 0px; =
-webkit-text-stroke-width: 0px; text-decoration: none;"> =
</span><span style=3D"caret-color: rgb(0, 0, 0); font-family: Helvetica; =
font-size: 12px; font-style: normal; font-variant-caps: normal; =
font-weight: 400; letter-spacing: normal; text-align: start; =
text-indent: 0px; text-transform: none; white-space: normal; =
word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration: =
none; float: none; display: inline !important;">table =
<foobarserver> {</span><br style=3D"caret-color: rgb(0, 0, 0); =
font-family: Helvetica; font-size: 12px; font-style: normal; =
font-variant-caps: normal; font-weight: 400; letter-spacing: normal; =
text-align: start; text-indent: 0px; text-transform: none; white-space: =
normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; =
text-decoration: none;"><span class=3D"Apple-tab-span" =
style=3D"caret-color: rgb(0, 0, 0); font-family: Helvetica; font-size: =
12px; font-style: normal; font-variant-caps: normal; font-weight: 400; =
letter-spacing: normal; text-align: start; text-indent: 0px; =
text-transform: none; white-space: pre; word-spacing: 0px; =
-webkit-text-stroke-width: 0px; text-decoration: none;"> =
</span><span class=3D"Apple-tab-span" style=3D"caret-color: rgb(0, 0, =
0); font-family: Helvetica; font-size: 12px; font-style: normal; =
font-variant-caps: normal; font-weight: 400; letter-spacing: normal; =
text-align: start; text-indent: 0px; text-transform: none; white-space: =
pre; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration: =
none;"> </span><span style=3D"caret-color: rgb(0, 0, 0); font-family: =
Helvetica; font-size: 12px; font-style: normal; font-variant-caps: =
normal; font-weight: 400; letter-spacing: normal; text-align: start; =
text-indent: 0px; text-transform: none; white-space: normal; =
word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration: =
none; float: none; display: inline !important;">231.17.X.Y</span><br =
style=3D"caret-color: rgb(0, 0, 0); font-family: Helvetica; font-size: =
12px; font-style: normal; font-variant-caps: normal; font-weight: 400; =
letter-spacing: normal; text-align: start; text-indent: 0px; =
text-transform: none; white-space: normal; word-spacing: 0px; =
-webkit-text-stroke-width: 0px; text-decoration: none;"><span =
class=3D"Apple-tab-span" style=3D"caret-color: rgb(0, 0, 0); =
font-family: Helvetica; font-size: 12px; font-style: normal; =
font-variant-caps: normal; font-weight: 400; letter-spacing: normal; =
text-align: start; text-indent: 0px; text-transform: none; white-space: =
pre; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration: =
none;"> </span><span class=3D"Apple-tab-span" style=3D"caret-color: =
rgb(0, 0, 0); font-family: Helvetica; font-size: 12px; font-style: =
normal; font-variant-caps: normal; font-weight: 400; letter-spacing: =
normal; text-align: start; text-indent: 0px; text-transform: none; =
white-space: pre; word-spacing: 0px; -webkit-text-stroke-width: 0px; =
text-decoration: none;"> </span><span style=3D"caret-color: =
rgb(0, 0, 0); font-family: Helvetica; font-size: 12px; font-style: =
normal; font-variant-caps: normal; font-weight: 400; letter-spacing: =
normal; text-align: start; text-indent: 0px; text-transform: none; =
white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; =
text-decoration: none; float: none; display: inline =
!important;">fe80::5246:...</span><br style=3D"caret-color: rgb(0, 0, =
0); font-family: Helvetica; font-size: 12px; font-style: normal; =
font-variant-caps: normal; font-weight: 400; letter-spacing: normal; =
text-align: start; text-indent: 0px; text-transform: none; white-space: =
normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; =
text-decoration: none;"><span class=3D"Apple-tab-span" =
style=3D"caret-color: rgb(0, 0, 0); font-family: Helvetica; font-size: =
12px; font-style: normal; font-variant-caps: normal; font-weight: 400; =
letter-spacing: normal; text-align: start; text-indent: 0px; =
text-transform: none; white-space: pre; word-spacing: 0px; =
-webkit-text-stroke-width: 0px; text-decoration: none;"> =
</span><span style=3D"caret-color: rgb(0, 0, 0); font-family: Helvetica; =
font-size: 12px; font-style: normal; font-variant-caps: normal; =
font-weight: 400; letter-spacing: normal; text-align: start; =
text-indent: 0px; text-transform: none; white-space: normal; =
word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration: =
none; float: none; display: inline !important;">}</span><br =
style=3D"caret-color: rgb(0, 0, 0); font-family: Helvetica; font-size: =
12px; font-style: normal; font-variant-caps: normal; font-weight: 400; =
letter-spacing: normal; text-align: start; text-indent: 0px; =
text-transform: none; white-space: normal; word-spacing: 0px; =
-webkit-text-stroke-width: 0px; text-decoration: none;"><br =
style=3D"caret-color: rgb(0, 0, 0); font-family: Helvetica; font-size: =
12px; font-style: normal; font-variant-caps: normal; font-weight: 400; =
letter-spacing: normal; text-align: start; text-indent: 0px; =
text-transform: none; white-space: normal; word-spacing: 0px; =
-webkit-text-stroke-width: 0px; text-decoration: none;"><span =
class=3D"Apple-tab-span" style=3D"caret-color: rgb(0, 0, 0); =
font-family: Helvetica; font-size: 12px; font-style: normal; =
font-variant-caps: normal; font-weight: 400; letter-spacing: normal; =
text-align: start; text-indent: 0px; text-transform: none; white-space: =
pre; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration: =
none;"> </span><span style=3D"caret-color: rgb(0, 0, 0); font-family: =
Helvetica; font-size: 12px; font-style: normal; font-variant-caps: =
normal; font-weight: 400; letter-spacing: normal; text-align: start; =
text-indent: 0px; text-transform: none; white-space: normal; =
word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration: =
none; float: none; display: inline !important;">table <bar-net> =
{</span><br style=3D"caret-color: rgb(0, 0, 0); font-family: Helvetica; =
font-size: 12px; font-style: normal; font-variant-caps: normal; =
font-weight: 400; letter-spacing: normal; text-align: start; =
text-indent: 0px; text-transform: none; white-space: normal; =
word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration: =
none;"><span class=3D"Apple-tab-span" style=3D"caret-color: rgb(0, 0, =
0); font-family: Helvetica; font-size: 12px; font-style: normal; =
font-variant-caps: normal; font-weight: 400; letter-spacing: normal; =
text-align: start; text-indent: 0px; text-transform: none; white-space: =
pre; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration: =
none;"> </span><span class=3D"Apple-tab-span" style=3D"caret-color: =
rgb(0, 0, 0); font-family: Helvetica; font-size: 12px; font-style: =
normal; font-variant-caps: normal; font-weight: 400; letter-spacing: =
normal; text-align: start; text-indent: 0px; text-transform: none; =
white-space: pre; word-spacing: 0px; -webkit-text-stroke-width: 0px; =
text-decoration: none;"> </span><span style=3D"caret-color: =
rgb(0, 0, 0); font-family: Helvetica; font-size: 12px; font-style: =
normal; font-variant-caps: normal; font-weight: 400; letter-spacing: =
normal; text-align: start; text-indent: 0px; text-transform: none; =
white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; =
text-decoration: none; float: none; display: inline =
!important;">...</span><br style=3D"caret-color: rgb(0, 0, 0); =
font-family: Helvetica; font-size: 12px; font-style: normal; =
font-variant-caps: normal; font-weight: 400; letter-spacing: normal; =
text-align: start; text-indent: 0px; text-transform: none; white-space: =
normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; =
text-decoration: none;"><span class=3D"Apple-tab-span" =
style=3D"caret-color: rgb(0, 0, 0); font-family: Helvetica; font-size: =
12px; font-style: normal; font-variant-caps: normal; font-weight: 400; =
letter-spacing: normal; text-align: start; text-indent: 0px; =
text-transform: none; white-space: pre; word-spacing: 0px; =
-webkit-text-stroke-width: 0px; text-decoration: none;"> =
</span><span style=3D"caret-color: rgb(0, 0, 0); font-family: Helvetica; =
font-size: 12px; font-style: normal; font-variant-caps: normal; =
font-weight: 400; letter-spacing: normal; text-align: start; =
text-indent: 0px; text-transform: none; white-space: normal; =
word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration: =
none; float: none; display: inline !important;">}</span><br =
style=3D"caret-color: rgb(0, 0, 0); font-family: Helvetica; font-size: =
12px; font-style: normal; font-variant-caps: normal; font-weight: 400; =
letter-spacing: normal; text-align: start; text-indent: 0px; =
text-transform: none; white-space: normal; word-spacing: 0px; =
-webkit-text-stroke-width: 0px; text-decoration: none;"><br =
style=3D"caret-color: rgb(0, 0, 0); font-family: Helvetica; font-size: =
12px; font-style: normal; font-variant-caps: normal; font-weight: 400; =
letter-spacing: normal; text-align: start; text-indent: 0px; =
text-transform: none; white-space: normal; word-spacing: 0px; =
-webkit-text-stroke-width: 0px; text-decoration: none;"><span =
class=3D"Apple-tab-span" style=3D"caret-color: rgb(0, 0, 0); =
font-family: Helvetica; font-size: 12px; font-style: normal; =
font-variant-caps: normal; font-weight: 400; letter-spacing: normal; =
text-align: start; text-indent: 0px; text-transform: none; white-space: =
pre; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration: =
none;"> </span><span style=3D"caret-color: rgb(0, 0, 0); font-family: =
Helvetica; font-size: 12px; font-style: normal; font-variant-caps: =
normal; font-weight: 400; letter-spacing: normal; text-align: start; =
text-indent: 0px; text-transform: none; white-space: normal; =
word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration: =
none; float: none; display: inline !important;">pass on { tun0, $ext_if =
} proto udp from <bar-net> \</span><br style=3D"caret-color: =
rgb(0, 0, 0); font-family: Helvetica; font-size: 12px; font-style: =
normal; font-variant-caps: normal; font-weight: 400; letter-spacing: =
normal; text-align: start; text-indent: 0px; text-transform: none; =
white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; =
text-decoration: none;"><span class=3D"Apple-tab-span" =
style=3D"caret-color: rgb(0, 0, 0); font-family: Helvetica; font-size: =
12px; font-style: normal; font-variant-caps: normal; font-weight: 400; =
letter-spacing: normal; text-align: start; text-indent: 0px; =
text-transform: none; white-space: pre; word-spacing: 0px; =
-webkit-text-stroke-width: 0px; text-decoration: none;"> =
</span><span class=3D"Apple-tab-span" style=3D"caret-color: rgb(0, 0, =
0); font-family: Helvetica; font-size: 12px; font-style: normal; =
font-variant-caps: normal; font-weight: 400; letter-spacing: normal; =
text-align: start; text-indent: 0px; text-transform: none; white-space: =
pre; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration: =
none;"> </span><span style=3D"caret-color: rgb(0, 0, 0); font-family: =
Helvetica; font-size: 12px; font-style: normal; font-variant-caps: =
normal; font-weight: 400; letter-spacing: normal; text-align: start; =
text-indent: 0px; text-transform: none; white-space: normal; =
word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration: =
none; float: none; display: inline !important;">to <foobarserver> =
port 2194</span><br style=3D"caret-color: rgb(0, 0, 0); font-family: =
Helvetica; font-size: 12px; font-style: normal; font-variant-caps: =
normal; font-weight: 400; letter-spacing: normal; text-align: start; =
text-indent: 0px; text-transform: none; white-space: normal; =
word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration: =
none;"></div></blockquote><div><br></div>Ok - excellent - =C8=99o one =
can mix IPv4 and IPv6 in a list - and =E2=80=98udp=E2=80=99 no longer =
needs to be =E2=80=98udp6=E2=80=99 (and same for tcp6 and icmp6 v.s. =
tcp/icmp_=E2=80=94 pf guesses this right based on the address =
?</div></div></blockquote><br></div><div>Ignore - that works perfectly - =
with inet/inet6 thrown in where I need to make the =
distinction.</div><div><br></div><div>Thanks =
!</div><div><br></div><div>Dw.</div><br></body></html>=
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