Hi,
Is it possible to configure stunnel to use the same port on different IP addresses that are Ethernet aliases?
I have successfully set up a configuration file accepting SSL connections. Firstly I did this on all IP addresses by using the following configuration lines:
accept = 443 connect = 80
This worked correctly.
I then attempted to setup a second configuration file on an aliased Ethernet address.
The configuration file settings are:
test1.conf accept = 10.168.1.132:443 connect = 10.168.1.132:80
test2.conf accept = 10.168.1.133:443 connect = 10.168.1.133:80
Stunnel is able to start the first configuration file, but not the second. The error message I can see when I run the second configuration file in the foreground is:
accept socket: FD=11 allocated (non-blocking mode) Option SO_REUSEADDR set on accept socket Error binding https to 10.168.1.133:443 bind: Address already in use (98)
and if I telnet to 10.168.1.133 on port 443 the connection is accepted.
I have attempted to use the binding socket options in the configuration files as described in the manual:
socket = a:SO_BINDTODEVICE=eth0:0 and socket = a:SO_BINDTODEVICE=eth0:1
However in this case stunnel will not start either configuration file. The error message I receive is: Option SO_REUSEADDR set on accept socket SO_BINDTODEVICE: No such device (19)
Is there a different way to configure stunnel to allow this to work? My ipconfig settings are below.
I am running the ubuntu 10.04 version of stunnel. The version output is:
stunnel 4.35 on x86_64-pc-linux-gnu with OpenSSL 1.0.0e 6 Sep 2011 Threading:PTHREAD SSL:ENGINE Sockets:POLL,IPv6 Auth:LIBWRAP
Thanks,
John
eth0:0 Link encap:Ethernet HWaddr 3c:4a:92:6d:0b:08 inet addr:10.168.1.132 Bcast:10.168.1.132 Mask:255.255.255.255 UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 Interrupt:16 Memory:f4000000-f4012800
eth0:1 Link encap:Ethernet HWaddr 3c:4a:92:6d:0b:08 inet addr:10.168.1.133 Bcast:10.168.1.133 Mask:255.255.255.255 UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 Interrupt:16 Memory:f4000000-f4012800