Hello,

On 5/10/23 00:28, d3rIIIe15ter Tier wrote:
Please advise why you strongly advise running stunnel in a chroot jail?

Because:

1. It's insanely easy to do (it literally IS just "chroot=/path/to/jail")

and

2. If there is a problem with stunnel (e.g. security issue), the amount of damage an attacker can do is significantly limited

-chris

On Tue, May 9, 2023 at 5:59 PM Christopher Schultz <ch...@christopherschultz.net <mailto:ch...@christopherschultz.net>> wrote:

    Hello,

    On 5/9/23 11:13, d3rIIIe15ter Tier wrote:
     > After giving access to var/log/secure/stunnel.log, I now get logs!
     >
     > There I get the following error:
     >
     > Cannot create  pid file /var/run/stunnel4.pid
     > create: Permission denied (13)

    What is the euid of the stunnel process? Does it have access to that
    path? Are you using a chroot jail? (You should be.) Does that path
    exist
    in the chroot jail? Can the stunnel user write to that path?

    -chris

     > On Tue, May 9, 2023 at 4:34 PM d3rIIIe15ter Tier
    <trashra...@gmail.com <mailto:trashra...@gmail.com>
     > <mailto:trashra...@gmail.com <mailto:trashra...@gmail.com>>> wrote:
     >
     >     You are right... bad mistake.
     >
     >     Now I get:  cannot open log file - which I am sure is a
    permission
     >     thing since I need to use sudo to be able to write to that file.
     >     Any ideas further?
     >
     >     On Tue, May 9, 2023 at 4:21 PM Christopher Schultz
     >     <ch...@christopherschultz.net
    <mailto:ch...@christopherschultz.net>
    <mailto:ch...@christopherschultz.net
    <mailto:ch...@christopherschultz.net>>>
     >     wrote:
     >
     >         Hello,
     >
     >         On 5/9/23 10:17, d3rIIIe15ter Tier wrote:
     >          > I have tried changing the location to
     >          >
     >          > var/log/stunnel4/stunnel.log
     >          > var/log/stunnel4/stunnelLog
     >          > var/log/secure/
     >          > var/log/secure/stunnel.log
     >          > etc/stunnel/stunnel.log
     >          > etc/stunnel/stunnelLog
     >          >
     >          > don't know how to fix it yet...
     >         I don't think the *value* is the problem. The problem is that
     >         you have
     >         defined "output" somewhere that isn't valid, such as within a
     >         specific
     >         service's section instead of as a global setting.
     >
     >         -chris
     >
     >          > On Tue, May 9, 2023 at 3:54 PM Christopher Schultz
     >          > <ch...@christopherschultz.net
    <mailto:ch...@christopherschultz.net>
     >         <mailto:ch...@christopherschultz.net
    <mailto:ch...@christopherschultz.net>>
     >         <mailto:ch...@christopherschultz.net
    <mailto:ch...@christopherschultz.net>
     >         <mailto:ch...@christopherschultz.net
    <mailto:ch...@christopherschultz.net>>>> wrote:
     >          >
     >          >     Hello,
     >          >
     >          >     On 5/9/23 09:40, trashra...@gmail.com
    <mailto:trashra...@gmail.com>
     >         <mailto:trashra...@gmail.com
    <mailto:trashra...@gmail.com>> <mailto:trashra...@gmail.com
    <mailto:trashra...@gmail.com>
     >         <mailto:trashra...@gmail.com <mailto:trashra...@gmail.com>>>
     >          >     wrote:
     >          >      > Hi,  I am on Debian - when I run "sudo stunnel
     >         stunnel.conf" I
     >          >     get the following output:
     >          >      >
     >          >      > [ ] Clients allowed=500
     >          >      > [.] stunnel 5.56 on x86_64-pc-linux-gnu platform
     >          >      > [.] Compiled with OpenSSL 1.1.1k  25 Mar 2021
     >          >      > [.] Running  with OpenSSL 1.1.1n  15 Mar 2022
     >          >      > [.] Threading:PTHREAD Sockets:POLL,IPv6,SYSTEMD
     >          >     TLS:ENGINE,FIPS,OCSP,PSK,SNI Auth:LIBWRAP
     >          >      > [ ] errno: (*__errno_location ())
     >          >      > [.] Reading configuration from file
     >         /etc/stunnel/stunnel.conf
     >          >      > [.] UTF-8 byte order mark not detected
     >          >      > [.] FIPS mode disabled
     >          >      > [ ] Compression disabled
     >          >      > [ ] No PRNG seeding was required
     >          >      > [!] /etc/stunnel/stunnel.conf:24: "output =
     >         /tmp/stunnel.log":
     >          >     Specified option name is not valid here
     >          >      > [ ] Deallocating section defaults
     >          >      >
     >          >      > When I run "sudo netstat -tulnp | grep -i
    stunnel"  I
     >         also get no
     >          >     output - which means that stunnel is not starting up?
     >          >
     >          >     The log message seems pretty specific to me. Maybe you
     >         should fix that?
     >          >
     >          >     -chris
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