Nikos, thank you. I appended " mssclamp 1440 " in ipf.rule, it works now! And I have tried not use it but add "set link mtu 1440" in mpd.conf, and failed. Yes, the problem occurs when NATing, and mssclamp 1440 is the key. fbsd, thank you anyway. Arnold Lee 2006 -04-14
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