[lug] firewall logs
Warren Sanders
sanders at MontanaLinux.Org
Tue Jan 16 09:12:42 MST 2001
Over the past couple weeks I have set up my firewall to more than just
masquerade. I have @home and blocked their scans of <1024. Since then I
have been getting too many kernel: Packet logs. Here is an example:
Jan 16 08:48:52 Sandman kernel: Packet log: input DENY lo PROTO=17
24.11.6.X.X:138 24.11.X.X:138 L=249 S=0x00 I=32305 F=0x0000 T=64 (#2)
This is my ipchain listing:
[root at Sandman /root]# ipchains -L
Chain input (policy ACCEPT):
target prot opt source destination ports
DENY tcp ----l- 24.0.0.0/8 C317121-A.localdomain any ->
0:1024
DENY udp ----l- 24.0.0.0/8 C317121-A.localdomain any ->
0:1024
DENY icmp ----l- 24.0.0.0/8 C317121-A.localdomain any ->
0:1024
ACCEPT tcp ------ femail7.sdc1.sfba.home.com 10.0.0.0/24
any -> 1023:65535
ACCEPT tcp ------ femail8.sdc1.sfba.home.com 10.0.0.0/24
any -> 1023:65535
ACCEPT tcp ------ femail9.sdc1.sfba.home.com 10.0.0.0/24
any -> 1023:65535
ACCEPT tcp ------ femail10.sdc1.sfba.home.com 10.0.0.0/24
any -> 1023:65535
ACCEPT tcp ------ femail1.sdc1.sfba.home.com 10.0.0.0/24
any -> 1023:65535
ACCEPT tcp ------ femail2.sdc1.sfba.home.com 10.0.0.0/24
any -> 1023:65535
ACCEPT tcp ------ femail3.sdc1.sfba.home.com 10.0.0.0/24
any -> 1023:65535
ACCEPT tcp ------ femail4.sdc1.sfba.home.com 10.0.0.0/24
any -> 1023:65535
ACCEPT tcp ------ femail5.sdc1.sfba.home.com 10.0.0.0/24
any -> 1023:65535
ACCEPT tcp ------ femail6.sdc1.sfba.home.com 10.0.0.0/24
any -> 1023:65535
ACCEPT tcp ------ home-www.excite.com 10.0.0.0/24 any ->
1023:65355
ACCEPT tcp ------ proxy1.bllngs1.mt.home.com 10.0.0.0/24
any -> 1023:65535
ACCEPT tcp ------ proxy2.bllngs1.mt.home.com 10.0.0.0/24
any -> 1023:65535
ACCEPT tcp ------ news1.sttls1.wa.home.com 10.0.0.0/24 any
-> 1023:65535
ACCEPT tcp ------ home-www.excite.com 10.0.0.0/24 any ->
1023:65535
ACCEPT tcp ------ ns1.home.net 10.0.0.0/24 any ->
1023:65535
ACCEPT tcp ------ ns2.home.net 10.0.0.0/24 any ->
1023:65535
ACCEPT udp ------ ns1.home.net 10.0.0.0/24 any ->
1023:65535
ACCEPT udp ------ ns2.home.net 10.0.0.0/24 any ->
1023:65535
Chain forward (policy DENY):
target prot opt source destination ports
MASQ all ------ 10.0.0.0/24 anywhere n/a
Chain output (policy ACCEPT):
My concern is... Am I blocking my own packets some how? FYI I do have a
domain here but the NS is being hosted elsewhere.
--
Warren Sanders
http://MontanaLinux.Org
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