Stunnel 4.07 and 4.08 don't build under HPUX 10.20. 4.06 appears to build, but doesn't appear to work---with a config file like this, running on the local host:
Yes, there is a bug with Stunnel -4.06. Yes, it will hang on HP-UX mchines because of the infinite loop error with daemon_loop ( ). And a patch was released to overcome this.
you can find the information about this on the list's archives at; http://mirt.net/pipermail/stunnel-users/2004-December/000224.html
I have attached that patch with this mail. Also I was able to compile stunenl- 4.07 on HP-UX 11.11 and 11.22, So it must compile on 10.20 series. Anyway post errors clearily on the list, we will help you.
-- Senthil Prabu.S