Hi, on a firewall test system with newly installed iptables packet filter, I get the following log entries: Jun 18 11:38:48 lnxsrv2 kernel: RULE 9 -- Deny IN=eth0 OUT= MAC=ff:ff:ff:ff:ff:ff:00:60:67:78:2e:37:08:00 SRC=192.168.1.12 DST=255.255.255.255 LEN=44 TOS=0x00 PREC=0x00 TTL=64 ID=0 DF PROTO=UDP SPT=32769 DPT=7741 LEN=24 Jun 18 11:38:48 lnxsrv2 kernel: RULE 9 -- Deny IN=eth0 OUT= MAC=ff:ff:ff:ff:ff:ff:00:60:67:78:2e:37:08:00 SRC=192.168.1.12 DST=255.255.255.255 LEN=44 TOS=0x00 PREC=0x00 TTL=64 ID=0 DF PROTO=UDP SPT=32769 DPT=7741 LEN=24 The source host is an internal work PC, the internal net is DHCP based. What could be the source of these UDP packets? DHCP? DNS? Any clues? Best regards, Jochen