Strange problem with url redirecting when clicking on a link

[Poul-Henning Kamp]

In message <4896CF2F.3030209 at smile.fr>, Damien Sarazin writes:

>The issue is that when the client clicked on a link, the url was 
>redirect towards the port 81 and given that varnish is listening on the 
>port 80 the pages were not normally displayed.

That sounds utterly impossible.

Is there any chance that the client has server:80 configured as
HTTP proxy ?

-- 
Poul-Henning Kamp       | UNIX since Zilog Zeus 3.20
phk at FreeBSD.ORG         | TCP/IP since RFC 956
FreeBSD committer       | BSD since 4.3-tahoe    
Never attribute to malice what can adequately be explained by incompetence.