[stunnel-users] Connection refused, then connects

[Flo Rance]

And in addition, if you want to know which service is already listening to
a port, you can use: sudo lsof -nP -iTCP:465 -sTCP:LISTEN

On Fri, May 17, 2019 at 9:07 AM Peter Pentchev <roam at ringlet.net> wrote:

> On Fri, May 17, 2019 at 01:54:47PM +1000, James Brown wrote:
> > Can anyone tell me why It tries ::1:25 first and fails before connecting
> to 127.0.0.1:25?
> >
> > 2019.05.17 13:48:34 LOG5[21]: Service [ssmtp465] accepted connection
> from ::ffff:192.168.1.76:49170
> > 2019.05.17 13:48:34 LOG3[21]: s_connect: connect ::1:25: Connection
> refused (61)
> > 2019.05.17 13:48:34 LOG5[21]: s_connect: connected 127.0.0.1:25
> > 2019.05.17 13:48:34 LOG5[21]: Service [ssmtp465] connected remote server
> from 127.0.0.1:56701
> >
> > /usr/local/etc/stunnel/stunnel.conf has:
> >
> > [ssmtp465]
> > client = no
> > accept  = 465
> > connect = 25
> > options = NO_SSLv2
> > #transparent = source
>
> You have specified only a port number, not an address; thus, stunnel
> assumes
> the local host address. You have not explicitly told it to only use IPv4
> addresses, so it tries the IPv6 local host address (::1) first; when that
> fails, it falls back to the IPv4 local host address (127.0.0.1).
>
> If you change the line to "connect = 127.0.0.1:25" like for your other
> service, it will go straight to the IPv4 local host address.
>
> Hope that helps!
>
> G'luck,
> Peter
>
> --
> Peter Pentchev  roam@{ringlet.net,debian.org,FreeBSD.org} pp at storpool.com
> PGP key:        http://people.FreeBSD.org/~roam/roam.key.asc
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