[Spread-users] Newbie: 2 servers, 1 linux, 1 NT, each has one deamon running, locally work fine, but can't communicate over the internet

[John Lane Schultz]

Something between your two daemons is probably blocking their point-to-point traffic to one another.  The culprit could be any number of things, but is most likely either a machine level or network level firewall somewhere in the mix.

You need to make sure that the port number you pick X (3333), port X + 1 and port X + 2 are all open for UDP traffic for all the daemons in your configuration.  You can try using sp_send and sp_recv to see if traffic can flow on those ports at all between your machines.  Or, you could try some other more basic utility (ping?) to check the same thing.

PS - If you are only going to have single machines in a segment, then set the segment address to be 127.0.0.1 so they don't bother any other machines in their subnet.  If you are going to have multiple daemons within a subnet, then use a multicast address (e.g. - 227.227.227.227) so that your daemons don't needlessly bother uninvolved machines by using the network broadcast address.

Cheers!
John

---
John Lane Schultz
Spread Concepts LLC
Phn: 443 838 2200 
Fax: 301 560 8875

Thursday, January 22, 2009, 2:29:39 AM, you wrote:

> Hi,
> here is the config file,same for both servers: 
>  
> Spread_Segment xxx.93.145.255:3333 {
> machine1 xxx.93.145.124
> }
> Spread_Segment yyy.154.219.255:3333 {
> machineB1 yyy.154.219.120
> }
>  
> On each server the deamon works fine, and client sessions can
> communicate, but there is no way to make both server deamona see
> each other and have the messages cross over the internet and reach the other deamon.
>  
> After starting up the deamons on each server, this is what I get: 
>  
> on server at yyy.154.219.120 (linux)

> ....
> Conf_load_conf_file: using file: spread.conf
> Successfully configured Segment 0 [xxx.93.145.255:3333] with 1 procs:
>                     machine1: xxx.93.145.124
> Successfully configured Segment 1 [yyy.154.219.255:3333] with 1 procs:
>                    machineB1: yyy.154.219.120
> Finished configuration file.
> Hash value for this configuration is: 1744128833
> Conf_load_conf_file: My name: machineB1, id: xyyy.154.219.120, port: 3333
> Membership id is ( -660939912, 1232603174)
> --------------------
> Configuration at machineB1 is:
> Num Segments 2
>         0       xxx.93.145.255    3333
>         1       xxyyy.154.219.255   3333
>                 machineB1               yyy.154.219.120
> ====================
>  
> <<<<<<<<<<<<<<<<
>  
> On server xxx.93.145.255    (NT)
>  

> Conf_load_conf_file: using file: spread.conf
> Successfully configured Segment 0 [xxx.93.145.124:3333] with 1 procs:
>                     machine1: xxx.93.145.124
> Successfully configured Segment 1 [yyy.154.219.120:3333] with 1 procs:
>                    machineB1: yyy.154.219.120
> Finished configuration file.
> Hash value for this configuration is: 2008767669
> Conf_load_conf_file: My name: machine1, id: xxx.93.145.124, port: 3333
> Membership id is ( -799174276, 1232608861)
> --------------------
> Configuration at machine1 is:
> Num Segments 2
>         1       xxx.93.145.124    3333
>                 machine1                xxx.93.145.124
>         0       yyy.154.219.120   3333
> ====================
>  
> <<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<
>  
> I can connect locally on each server using spuser, join a group and
> send messages. If I use several clients joining the same group, they all see each other.
> However. joining the same group on both severs across the internet
> will not get me anywhere. No client session from one server gets to the other server
> Now, both server have no firewall, I have disabled it on the NT and opened everything on the linux.
> Shoulnd't this work or am I missing something?
>  
> Hope someone can help, I haven't been able to figure it out.
>  
> Thanks in advance
> Paolo