Strange firewall log entries

Hi All! I have thousands(!!!) of such entries in logfile on my internet router linux box. 1. Packet log: output DENY ippp0 PROTO=1 [My ISDN Dynamic IP]:3 [ISP_DNS_IP]:3 L=56 S=0x00 I=11521 F=0x0000 T=127 (#3) Port 3 means "compressnet". Could/should I allow this compressnet (and how?) or just to disable loggging? 2. Packet log: input DENY ippp0 PROTO=1 [Some Inet IP]:8 [My ISDN Dynamic IP]:0 L=15 00 S=0x00 I=45898 F=0x4000 T=252 (#161) What is the Port 8, which is missing from /etc/services and what to do with that? Thanks, Slava.