Dear all,

In my office, some users have a problem with Yahoo Messenger. Sometimes
it is offline and online again, sometimes it takes along time to login.
When I see in fw-1 log there were some drop log : destination to yahoo,
source from the workstation which has this problem with service http,
product SmartDefence, and its information is "TCP sequence validator:
SYN retransmit with different sequence". In netstat info at workstation,
the connection to yahoo is always SYN_SENT.

Please tell me what is problem actually and please help me to solve this
problem.

Thanks in advance.

Regards,
Suryanto

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