Can anyone explain what this is?

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1

This is some random messages that have started apearing on my screeen…

Also can some one guide me to the correct guide on how to block ips etc…

Message from syslogd@webserver at Aug 16 23:15:04 ...
 kernel:nf_ct_ftp: dropping packetIN= OUT=lo SRC=127.0.0.1 DST=127.0.0.1 LEN=100 TOS=0x00 PREC=0x00 TTL=64 ID=48819 DF PROTO=TCP SPT=21 DPT=57574 SEQ=917877035 ACK=3649620377 WINDOW=973 RES=0x00 ACK PSH URGP=0 OPT (0101080A5605B4975605B497) UID=0 GID=0

Message from syslogd@webserver at Aug 16 23:15:04 ...
 kernel:nf_ct_ftp: dropping packetIN= OUT=lo SRC=127.0.0.1 DST=127.0.0.1 LEN=112 TOS=0x00 PREC=0x00 TTL=64 ID=48820 DF PROTO=TCP SPT=21 DPT=57574 SEQ=917877035 ACK=3649620377 WINDOW=973 RES=0x00 ACK PSH URGP=0 OPT (0101080A5605B5605605B5600101050AD988C993D988C999) UID=0 GID=0

Message from syslogd@webserver at Aug 16 23:15:05 ...
 kernel:nf_ct_ftp: dropping packetIN= OUT=lo SRC=127.0.0.1 DST=127.0.0.1 LEN=100 TOS=0x00 PREC=0x00 TTL=64 ID=48821 DF PROTO=TCP SPT=21 DPT=57574 SEQ=917877035 ACK=3649620377 WINDOW=973 RES=0x00 ACK PSH URGP=0 OPT (0101080A5605B62D5605B560) UID=0 GID=0

Message from syslogd@webserver at Aug 16 23:15:05 ...
 kernel:nf_ct_ftp: dropping packetIN= OUT=lo SRC=127.0.0.1 DST=127.0.0.1 LEN=112 TOS=0x00 PREC=0x00 TTL=64 ID=48822 DF PROTO=TCP SPT=21 DPT=57574 SEQ=917877035 ACK=3649620377 WINDOW=973 RES=0x00 ACK PSH URGP=0 OPT (0101080A5605B6F25605B6F20101050AD988C993D988C999) UID=0 GID=0

Message from syslogd@webserver at Aug 16 23:15:05 ...
 kernel:nf_ct_ftp: dropping packetIN= OUT=lo SRC=127.0.0.1 DST=127.0.0.1 LEN=100 TOS=0x00 PREC=0x00 TTL=64 ID=48823 DF PROTO=TCP SPT=21 DPT=57574 SEQ=917877035 ACK=3649620377 WINDOW=973 RES=0x00 ACK PSH URGP=0 OPT (0101080A5605B7BF5605B6F2) UID=0 GID=0

Message from syslogd@webserver at Aug 16 23:15:05 ...
 kernel:nf_ct_ftp: dropping packetIN= OUT=lo SRC=127.0.0.1 DST=127.0.0.1 LEN=100 TOS=0x00 PREC=0x00 TTL=64 ID=48824 DF PROTO=TCP SPT=21 DPT=57574 SEQ=917877035 ACK=3649620377 WINDOW=973 RES=0x00 ACK PSH URGP=0 OPT (0101080A5605B9555605B6F2) UID=0 GID=0

Message from syslogd@webserver at Aug 16 23:15:06 ...
 kernel:nf_ct_ftp: dropping packetIN= OUT=lo SRC=127.0.0.1 DST=127.0.0.1 LEN=112 TOS=0x00 PREC=0x00 TTL=64 ID=48825 DF PROTO=TCP SPT=21 DPT=57574 SEQ=917877035 ACK=3649620377 WINDOW=973 RES=0x00 ACK PSH URGP=0 OPT (0101080A5605BA165605BA160101050AD988C993D988C999) UID=0 GID=0

Message from syslogd@webserver at Aug 16 23:15:06 ...
 kernel:nf_ct_ftp: dropping packetIN= OUT=lo SRC=127.0.0.1 DST=127.0.0.1 LEN=100 TOS=0x00 PREC=0x00 TTL=64 ID=48826 DF PROTO=TCP SPT=21 DPT=57574 SEQ=917877035 ACK=3649620377 WINDOW=973 RES=0x00 ACK PSH URGP=0 OPT (0101080A5605BAE05605BA16) UID=0 GID=0

Message from syslogd@webserver at Aug 16 23:15:06 ...
 kernel:nf_ct_ftp: dropping packetIN= OUT=lo SRC=127.0.0.1 DST=127.0.0.1 LEN=100 TOS=0x00 PREC=0x00 TTL=64 ID=48827 DF PROTO=TCP SPT=21 DPT=57574 SEQ=917877035 ACK=3649620377 WINDOW=973 RES=0x00 ACK PSH URGP=0 OPT (0101080A5605BC765605BA16) UID=0 GID=0

Message from syslogd@webserver at Aug 16 23:15:07 ...
 kernel:nf_ct_ftp: dropping packetIN= OUT=lo SRC=127.0.0.1 DST=127.0.0.1 LEN=100 TOS=0x00 PREC=0x00 TTL=64 ID=48828 DF PROTO=TCP SPT=21 DPT=57574 SEQ=917877035 ACK=3649620377 WINDOW=973 RES=0x00 ACK PSH URGP=0 OPT (0101080A5605BF9E5605BA16) UID=0 GID=0

Message from syslogd@webserver at Aug 16 23:15:07 ...
 kernel:nf_ct_ftp: dropping packetIN= OUT=lo SRC=127.0.0.1 DST=127.0.0.1 LEN=112 TOS=0x00 PREC=0x00 TTL=64 ID=48829 DF PROTO=TCP SPT=21 DPT=57574 SEQ=917877035 ACK=3649620377 WINDOW=973 RES=0x00 ACK PSH URGP=0 OPT (0101080A5605C05E5605C05E0101050AD988C993D988C999) UID=0 GID=0

Message from syslogd@webserver at Aug 16 23:15:07 ...
 kernel:nf_ct_ftp: dropping packetIN= OUT=lo SRC=127.0.0.1 DST=127.0.0.1 LEN=100 TOS=0x00 PREC=0x00 TTL=64 ID=48830 DF PROTO=TCP SPT=21 DPT=57574 SEQ=917877035 ACK=3649620377 WINDOW=973 RES=0x00 ACK PSH URGP=0 OPT (0101080A5605C12B5605C05E) UID=0 GID=0

Message from syslogd@webserver at Aug 16 23:15:08 ...
 kernel:nf_ct_ftp: dropping packetIN= OUT=lo SRC=127.0.0.1 DST=127.0.0.1 LEN=100 TOS=0x00 PREC=0x00 TTL=64 ID=48831 DF PROTO=TCP SPT=21 DPT=57574 SEQ=917877035 ACK=3649620377 WINDOW=973 RES=0x00 ACK PSH URGP=0 OPT (0101080A5605C2C15605C05E) UID=0 GID=0

Message from syslogd@webserver at Aug 16 23:15:09 ...
 kernel:nf_ct_ftp: dropping packetIN= OUT=lo SRC=127.0.0.1 DST=127.0.0.1 LEN=100 TOS=0x00 PREC=0x00 TTL=64 ID=48832 DF PROTO=TCP SPT=21 DPT=57574 SEQ=917877035 ACK=3649620377 WINDOW=973 RES=0x00 ACK PSH URGP=0 OPT (0101080A5605C5E95605C05E) UID=0 GID=0

Message from syslogd@webserver at Aug 16 23:15:10 ...
 kernel:nf_ct_ftp: dropping packetIN= OUT=lo SRC=127.0.0.1 DST=127.0.0.1 LEN=100 TOS=0x00 PREC=0x00 TTL=64 ID=48833 DF PROTO=TCP SPT=21 DPT=57574 SEQ=917877035 ACK=3649620377 WINDOW=973 RES=0x00 ACK PSH URGP=0 OPT (0101080A5605CC355605C05E) UID=0 GID=0

Message from syslogd@webserver at Aug 16 23:15:10 ...
 kernel:nf_ct_ftp: dropping packetIN= OUT=lo SRC=127.0.0.1 DST=127.0.0.1 LEN=112 TOS=0x00 PREC=0x00 TTL=64 ID=48834 DF PROTO=TCP SPT=21 DPT=57574 SEQ=917877035 ACK=3649620377 WINDOW=973 RES=0x00 ACK PSH URGP=0 OPT (0101080A5605CCEE5605CCEE0101050AD988C993D988C999) UID=0 GID=0

Message from syslogd@webserver at Aug 16 23:15:11 ...
 kernel:nf_ct_ftp: dropping packetIN= OUT=lo SRC=127.0.0.1 DST=127.0.0.1 LEN=100 TOS=0x00 PREC=0x00 TTL=64 ID=48835 DF PROTO=TCP SPT=21 DPT=57574 SEQ=917877035 ACK=3649620377 WINDOW=973 RES=0x00 ACK PSH URGP=0 OPT (0101080A5605CDBB5605CCEE) UID=0 GID=0

Message from syslogd@webserver at Aug 16 23:15:11 ...
 kernel:nf_ct_ftp: dropping packetIN= OUT=lo SRC=127.0.0.1 DST=127.0.0.1 LEN=100 TOS=0x00 PREC=0x00 TTL=64 ID=48836 DF PROTO=TCP SPT=21 DPT=57574 SEQ=917877035 ACK=3649620377 WINDOW=973 RES=0x00 ACK PSH URGP=0 OPT (0101080A5605CF515605CCEE) UID=0 GID=0

Message from syslogd@webserver at Aug 16 23:15:12 ...
 kernel:nf_ct_ftp: dropping packetIN= OUT=lo SRC=127.0.0.1 DST=127.0.0.1 LEN=100 TOS=0x00 PREC=0x00 TTL=64 ID=48837 DF PROTO=TCP SPT=21 DPT=57574 SEQ=917877035 ACK=3649620377 WINDOW=973 RES=0x00 ACK PSH URGP=0 OPT (0101080A5605D2785605CCEE) UID=0 GID=0

Message from syslogd@webserver at Aug 16 23:15:13 ...
 kernel:nf_ct_ftp: dropping packetIN= OUT=lo SRC=127.0.0.1 DST=127.0.0.1 LEN=100 TOS=0x00 PREC=0x00 TTL=64 ID=48838 DF PROTO=TCP SPT=21 DPT=57574 SEQ=917877035 ACK=3649620377 WINDOW=973 RES=0x00 ACK PSH URGP=0 OPT (0101080A5605D8C45605CCEE) UID=0 GID=0

Message from syslogd@webserver at Aug 16 23:15:17 ...
 kernel:nf_ct_ftp: dropping packetIN= OUT=lo SRC=127.0.0.1 DST=127.0.0.1 LEN=100 TOS=0x00 PREC=0x00 TTL=64 ID=48839 DF PROTO=TCP SPT=21 DPT=57574 SEQ=917877035 ACK=3649620377 WINDOW=973 RES=0x00 ACK PSH URGP=0 OPT (0101080A5605E5585605CCEE) UID=0 GID=0

Message from syslogd@webserver at Aug 16 23:15:17 ...
 kernel:nf_ct_ftp: dropping packetIN= OUT=lo SRC=127.0.0.1 DST=127.0.0.1 LEN=112 TOS=0x00 PREC=0x00 TTL=64 ID=48840 DF PROTO=TCP SPT=21 DPT=57574 SEQ=917877035 ACK=3649620377 WINDOW=973 RES=0x00 ACK PSH URGP=0 OPT (0101080A5605E60E5605E60E0101050AD988C993D988C999) UID=0 GID=0

Message from syslogd@webserver at Aug 16 23:15:17 ...
 kernel:nf_ct_ftp: dropping packetIN= OUT=lo SRC=127.0.0.1 DST=127.0.0.1 LEN=100 TOS=0x00 PREC=0x00 TTL=64 ID=48841 DF PROTO=TCP SPT=21 DPT=57574 SEQ=917877035 ACK=3649620377 WINDOW=973 RES=0x00 ACK PSH URGP=0 OPT (0101080A5605E6DB5605E60E) UID=0 GID=0

Message from syslogd@webserver at Aug 16 23:15:17 ...
 kernel:nf_ct_ftp: dropping packetIN= OUT=lo SRC=127.0.0.1 DST=127.0.0.1 LEN=100 TOS=0x00 PREC=0x00 TTL=64 ID=48842 DF PROTO=TCP SPT=21 DPT=57574 SEQ=917877035 ACK=3649620377 WINDOW=973 RES=0x00 ACK PSH URGP=0 OPT (0101080A5605E8715605E60E) UID=0 GID=0

Message from syslogd@webserver at Aug 16 23:15:18 ...
 kernel:nf_ct_ftp: dropping packetIN= OUT=lo SRC=127.0.0.1 DST=127.0.0.1 LEN=100 TOS=0x00 PREC=0x00 TTL=64 ID=48843 DF PROTO=TCP SPT=21 DPT=57574 SEQ=917877035 ACK=3649620377 WINDOW=973 RES=0x00 ACK PSH URGP=0 OPT (0101080A5605EB995605E60E) UID=0 GID=0

Message from syslogd@webserver at Aug 16 23:15:20 ...
 kernel:nf_ct_ftp: dropping packetIN= OUT=lo SRC=127.0.0.1 DST=127.0.0.1 LEN=100 TOS=0x00 PREC=0x00 TTL=64 ID=48844 DF PROTO=TCP SPT=21 DPT=57574 SEQ=917877035 ACK=3649620377 WINDOW=973 RES=0x00 ACK PSH URGP=0 OPT (0101080A5605F1E55605E60E) UID=0 GID=0

Message from syslogd@webserver at Aug 16 23:15:23 ...
 kernel:nf_ct_ftp: dropping packetIN= OUT=lo SRC=127.0.0.1 DST=127.0.0.1 LEN=100 TOS=0x00 PREC=0x00 TTL=64 ID=48845 DF PROTO=TCP SPT=21 DPT=57574 SEQ=917877035 ACK=3649620377 WINDOW=973 RES=0x00 ACK PSH URGP=0 OPT (0101080A5605FE795605E60E) UID=0 GID=0

Message from syslogd@webserver at Aug 16 23:15:30 ...
 kernel:nf_ct_ftp: dropping packetIN= OUT=lo SRC=127.0.0.1 DST=127.0.0.1 LEN=100 TOS=0x00 PREC=0x00 TTL=64 ID=48846 DF PROTO=TCP SPT=21 DPT=57574 SEQ=917877035 ACK=3649620377 WINDOW=973 RES=0x00 ACK PSH URGP=0 OPT (0101080A5606179D5605E60E) UID=0 GID=0

Message from syslogd@webserver at Aug 16 23:15:30 ...
 kernel:nf_ct_ftp: dropping packetIN= OUT=lo SRC=127.0.0.1 DST=127.0.0.1 LEN=112 TOS=0x00 PREC=0x00 TTL=64 ID=48847 DF PROTO=TCP SPT=21 DPT=57574 SEQ=917877035 ACK=3649620377 WINDOW=973 RES=0x00 ACK PSH URGP=0 OPT (0101080A5606184E5606184E0101050AD988C993D988C999) UID=0 GID=0

Message from syslogd@webserver at Aug 16 23:15:30 ...
 kernel:nf_ct_ftp: dropping packetIN= OUT=lo SRC=127.0.0.1 DST=127.0.0.1 LEN=100 TOS=0x00 PREC=0x00 TTL=64 ID=48848 DF PROTO=TCP SPT=21 DPT=57574 SEQ=917877035 ACK=3649620377 WINDOW=973 RES=0x00 ACK PSH URGP=0 OPT (0101080A5606191B5606184E) UID=0 GID=0

Message from syslogd@webserver at Aug 16 23:15:30 ...
 kernel:nf_ct_ftp: dropping packetIN= OUT=lo SRC=127.0.0.1 DST=127.0.0.1 LEN=100 TOS=0x00 PREC=0x00 TTL=64 ID=48849 DF PROTO=TCP SPT=21 DPT=57574 SEQ=917877035 ACK=3649620377 WINDOW=973 RES=0x00 ACK PSH URGP=0 OPT (0101080A56061AB15606184E) UID=0 GID=0

Message from syslogd@webserver at Aug 16 23:15:31 ...
 kernel:nf_ct_ftp: dropping packetIN= OUT=lo SRC=127.0.0.1 DST=127.0.0.1 LEN=100 TOS=0x00 PREC=0x00 TTL=64 ID=48850 DF PROTO=TCP SPT=21 DPT=57574 SEQ=917877035 ACK=3649620377 WINDOW=973 RES=0x00 ACK PSH URGP=0 OPT (0101080A56061DD95606184E) UID=0 GID=0

Message from syslogd@webserver at Aug 16 23:15:33 ...
 kernel:nf_ct_ftp: dropping packetIN= OUT=lo SRC=127.0.0.1 DST=127.0.0.1 LEN=100 TOS=0x00 PREC=0x00 TTL=64 ID=48851 DF PROTO=TCP SPT=21 DPT=57574 SEQ=917877035 ACK=3649620377 WINDOW=973 RES=0x00 ACK PSH URGP=0 OPT (0101080A560624255606184E) UID=0 GID=0

Message from syslogd@webserver at Aug 16 23:15:36 ...
 kernel:nf_ct_ftp: dropping packetIN= OUT=lo SRC=127.0.0.1 DST=127.0.0.1 LEN=100 TOS=0x00 PREC=0x00 TTL=64 ID=48852 DF PROTO=TCP SPT=21 DPT=57574 SEQ=917877035 ACK=3649620377 WINDOW=973 RES=0x00 ACK PSH URGP=0 OPT (0101080A560630B95606184E) UID=0 GID=0

Message from syslogd@webserver at Aug 16 23:15:42 ...
 kernel:nf_ct_ftp: dropping packetIN= OUT=lo SRC=127.0.0.1 DST=127.0.0.1 LEN=100 TOS=0x00 PREC=0x00 TTL=64 ID=48853 DF PROTO=TCP SPT=21 DPT=57574 SEQ=917877035 ACK=3649620377 WINDOW=973 RES=0x00 ACK PSH URGP=0 OPT (0101080A560649DD5606184E) UID=0 GID=0

Message from syslogd@webserver at Aug 16 23:15:55 ...
 kernel:nf_ct_ftp: dropping packetIN= OUT=lo SRC=127.0.0.1 DST=127.0.0.1 LEN=100 TOS=0x00 PREC=0x00 TTL=64 ID=48854 DF PROTO=TCP SPT=21 DPT=57574 SEQ=917877035 ACK=3649620377 WINDOW=973 RES=0x00 ACK PSH URGP=0 OPT (0101080A56067C215606184E) UID=0 GID=0

Message from syslogd@webserver at Aug 16 23:15:55 ...
 kernel:nf_ct_ftp: dropping packetIN= OUT=lo SRC=127.0.0.1 DST=127.0.0.1 LEN=112 TOS=0x00 PREC=0x00 TTL=64 ID=48855 DF PROTO=TCP SPT=21 DPT=57574 SEQ=917877035 ACK=3649620377 WINDOW=973 RES=0x00 ACK PSH URGP=0 OPT (0101080A56067CCE56067CCE0101050AD988C993D988C999) UID=0 GID=0

Message from syslogd@webserver at Aug 16 23:15:56 ...
 kernel:nf_ct_ftp: dropping packetIN= OUT=lo SRC=127.0.0.1 DST=127.0.0.1 LEN=100 TOS=0x00 PREC=0x00 TTL=64 ID=48856 DF PROTO=TCP SPT=21 DPT=57574 SEQ=917877035 ACK=3649620377 WINDOW=973 RES=0x00 ACK PSH URGP=0 OPT (0101080A56067D9B56067CCE) UID=0 GID=0

Message from syslogd@webserver at Aug 16 23:15:56 ...
 kernel:nf_ct_ftp: dropping packetIN= OUT=lo SRC=127.0.0.1 DST=127.0.0.1 LEN=100 TOS=0x00 PREC=0x00 TTL=64 ID=48857 DF PROTO=TCP SPT=21 DPT=57574 SEQ=917877035 ACK=3649620377 WINDOW=973 RES=0x00 ACK PSH URGP=0 OPT (0101080A56067F3156067CCE) UID=0 GID=0

Message from syslogd@webserver at Aug 16 23:15:57 ...
 kernel:nf_ct_ftp: dropping packetIN= OUT=lo SRC=127.0.0.1 DST=127.0.0.1 LEN=100 TOS=0x00 PREC=0x00 TTL=64 ID=48858 DF PROTO=TCP SPT=21 DPT=57574 SEQ=917877035 ACK=3649620377 WINDOW=973 RES=0x00 ACK PSH URGP=0 OPT (0101080A5606826156067CCE) UID=0 GID=0

Message from syslogd@webserver at Aug 16 23:15:58 ...
 kernel:nf_ct_ftp: dropping packetIN= OUT=lo SRC=127.0.0.1 DST=127.0.0.1 LEN=100 TOS=0x00 PREC=0x00 TTL=64 ID=48859 DF PROTO=TCP SPT=21 DPT=57574 SEQ=917877035 ACK=3649620377 WINDOW=973 RES=0x00 ACK PSH URGP=0 OPT (0101080A560688B356067CCE) UID=0 GID=0

Message from syslogd@webserver at Aug 16 23:16:02 ...
 kernel:nf_ct_ftp: dropping packetIN= OUT=lo SRC=127.0.0.1 DST=127.0.0.1 LEN=100 TOS=0x00 PREC=0x00 TTL=64 ID=48860 DF PROTO=TCP SPT=21 DPT=57574 SEQ=917877035 ACK=3649620377 WINDOW=973 RES=0x00 ACK PSH URGP=0 OPT (0101080A5606954756067CCE) UID=0 GID=0

Message from syslogd@webserver at Aug 16 23:16:08 ...
 kernel:nf_ct_ftp: dropping packetIN= OUT=lo SRC=127.0.0.1 DST=127.0.0.1 LEN=100 TOS=0x00 PREC=0x00 TTL=64 ID=48861 DF PROTO=TCP SPT=21 DPT=57574 SEQ=917877035 ACK=3649620377 WINDOW=973 RES=0x00 ACK PSH URGP=0 OPT (0101080A5606AE6B56067CCE) UID=0 GID=0

Message from syslogd@webserver at Aug 16 23:16:21 ...
 kernel:nf_ct_ftp: dropping packetIN= OUT=lo SRC=127.0.0.1 DST=127.0.0.1 LEN=100 TOS=0x00 PREC=0x00 TTL=64 ID=48862 DF PROTO=TCP SPT=21 DPT=57574 SEQ=917877035 ACK=3649620377 WINDOW=973 RES=0x00 ACK PSH URGP=0 OPT (0101080A5606E0AF56067CCE) UID=0 GID=0

Message from syslogd@webserver at Aug 16 23:16:47 ...
 kernel:nf_ct_ftp: dropping packetIN= OUT=lo SRC=127.0.0.1 DST=127.0.0.1 LEN=100 TOS=0x00 PREC=0x00 TTL=64 ID=48863 DF PROTO=TCP SPT=21 DPT=57574 SEQ=917877035 ACK=3649620377 WINDOW=973 RES=0x00 ACK PSH URGP=0 OPT (0101080A5607453356067CCE) UID=0 GID=0

Message from syslogd@webserver at Aug 16 23:16:47 ...
 kernel:nf_ct_ftp: dropping packetIN= OUT=lo SRC=127.0.0.1 DST=127.0.0.1 LEN=112 TOS=0x00 PREC=0x00 TTL=64 ID=48864 DF PROTO=TCP SPT=21 DPT=57574 SEQ=917877035 ACK=3649620377 WINDOW=973 RES=0x00 ACK PSH URGP=0 OPT (0101080A560745CE560745CE0101050AD988C993D988C999) UID=0 GID=0

Message from syslogd@webserver at Aug 16 23:16:47 ...
 kernel:nf_ct_ftp: dropping packetIN= OUT=lo SRC=127.0.0.1 DST=127.0.0.1 LEN=100 TOS=0x00 PREC=0x00 TTL=64 ID=48865 DF PROTO=TCP SPT=21 DPT=57574 SEQ=917877035 ACK=3649620377 WINDOW=973 RES=0x00 ACK PSH URGP=0 OPT (0101080A5607469B560745CE) UID=0 GID=0

Message from syslogd@webserver at Aug 16 23:16:48 ...
 kernel:nf_ct_ftp: dropping packetIN= OUT=lo SRC=127.0.0.1 DST=127.0.0.1 LEN=100 TOS=0x00 PREC=0x00 TTL=64 ID=48866 DF PROTO=TCP SPT=21 DPT=57574 SEQ=917877035 ACK=3649620377 WINDOW=973 RES=0x00 ACK PSH URGP=0 OPT (0101080A56074831560745CE) UID=0 GID=0

Message from syslogd@webserver at Aug 16 23:16:48 ...
 kernel:nf_ct_ftp: dropping packetIN= OUT=lo SRC=127.0.0.1 DST=127.0.0.1 LEN=100 TOS=0x00 PREC=0x00 TTL=64 ID=48867 DF PROTO=TCP SPT=21 DPT=57574 SEQ=917877035 ACK=3649620377 WINDOW=973 RES=0x00 ACK PSH URGP=0 OPT (0101080A56074B59560745CE) UID=0 GID=0

Message from syslogd@webserver at Aug 16 23:16:50 ...
 kernel:nf_ct_ftp: dropping packetIN= OUT=lo SRC=127.0.0.1 DST=127.0.0.1 LEN=100 TOS=0x00 PREC=0x00 TTL=64 ID=48868 DF PROTO=TCP SPT=21 DPT=57574 SEQ=917877035 ACK=3649620377 WINDOW=973 RES=0x00 ACK PSH URGP=0 OPT (0101080A560751A5560745CE) UID=0 GID=0

Message from syslogd@webserver at Aug 16 23:16:53 ...
 kernel:nf_ct_ftp: dropping packetIN= OUT=lo SRC=127.0.0.1 DST=127.0.0.1 LEN=100 TOS=0x00 PREC=0x00 TTL=64 ID=48869 DF PROTO=TCP SPT=21 DPT=57574 SEQ=917877035 ACK=3649620377 WINDOW=973 RES=0x00 ACK PSH URGP=0 OPT (0101080A56075E39560745CE) UID=0 GID=0

Thanks so much!

2

For me this looks like your ftp server has a config error: it takes localhost(127.0.0.1) as source an the output goes to the loopback(lo) interface. The connection doesn’t leave the server so the packets are being dropped. But why the kernel shows those messages is weird…
Google tells that the firewall is the issue an another website shows a (possible) fix: https://loginroot.com/getting-rid-of-kernelnf_ct_ftp-messages/

2 Likes
3

As @mikabeckerich said: It is a FTP Connection (Source Port is 21). In detail it is active FTP.
Check Wikipedia for the differences of active and passive FTP:

1 Like