Hi all...! I'm working with Mandrake Linux Rel. 10.0 (official), kernel 2.6.3-7 MDK, using SCTP LIB- 1.0.3. I tried to establish two SCTP associations between a server process and two client processes. I’m working on a single PC, so I opened a shell for the server (ECHO_SERVER), and 2 shells for the client (TERMINAL). Both clients are using the same IP address (127.0.0.1), but different source port number. Server process is using IP address 127.0.0.1, and a source port number. I used ETHERAL to monitor all the traffic. When the association starts, between client#1 (C#1) and server (S), ETHERAL shows: INIT from C#1-->S INIT ACK from S-->C#1 COOKIE ECHO from C#1-->S COOKIE ACK from S-->C#1. When the second association starts, between client#2 and server: ETHERAL sees: INIT from C#2-->S INIT ACK from S-->C#2 COOKIE ECHO from C#2-->S COOKIE ACK from S-->C#1. It works right.. But when I try to do the same thing, between applications running on different hosts (the hosts are on the same LAN), I have encountered some problems..! The configuration is as following: Server host source IP address=IPA; client host IP source address=IP B; For the server host (IP A) I opened a shell (ECHO_SERVER); for the client host (IP B) I opened 2 shells (TERMINAL). First, I started the association between client#1 and server: ETHERAL sees: INIT from IPB (C#1)---> IP A (S); INIT ACK from IP A (S)--->IP B (C#1); COOKIE ECHO from IP B (C#1)--->IP A(S) COOKIE ACK from IP A(S)--->IP B(C#1). First association is successful established! After, I tried to start a second association, between client #2 and server: ETHERAL sees: INIT from IPB (C#2)---> IP A (S) INIT ACK from IP A (S)--->IP B (C#2) ABORT from IP B (C#2)--->IP A (S) COOKIE ECHO from IP B(C#2)--->IP A(S) COOKIE ACK from IP A--->IP B(C#2) HEARTBEAT from IP B(C#1)--->IP A(S) HEARTBEAT ACK from IP A(S)--->IP B(C#1) ABORT from IP B (C#1)--->IP A (S) HEARTBEAT from IP B(C#2)--->IP A(S) HEARTBEAT ACK from IP A(S)--->IP B(C#2) ABORT from IP B (C#2)--->IP A (S) HEARTBEAT from IP B(C#1)--->IP A(S); and...both the associations are terminated! Has someone experienced the same behavior? Why is there this strange packets traffic?... Could someone help me please?Best regards, LUCA.