[CentOS] iptables question
mlists at zoominternet.net
Tue Oct 20 00:26:05 UTC 2009
On Monday 19 October 2009 17:18, Bowie Bailey wrote:
> The logs on my mail server are filling up with this kind of thing:
> Oct 19 17:03:51 bnofmail kernel: REJECT: IN=eth0 OUT=
> MAC=XX:XX:XX:XX:XX:XX:XX:XX:XX:XX:XX:XX:XX:XX SRC=220.127.116.11
> DST=XX.XX.XX.XX LEN=189 TOS=0x00 PREC=0x00 TTL=52 ID=6284 DF PROTO=TCP
> SPT=25 DPT=32776 WINDOW=65535 RES=0x00 ACK PSH URGP=0
> The source port is always 25 and the destination is a high-numbered
> port. The destination address is the private IP of the server. These
> seem to be related to outgoing email connections based on the source
> IPs, but I don't know why they are not part of an established
> connection. The mail server seems to be running just fine regardless of
> these blocked connections.
> Any ideas?
Are you running a mixed firewall rule set? Stateful and Connection or just
one or the other? Since you state a private address, I'm going to assume you
mean something in the 192.168 or similar space, is NATting an issue?
Linux User #296285
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