Firewall Wizards mailing list archives

big ICMP size


From: bugiu <gabij () osim ro>
Date: Tue, 03 Oct 2000 01:30:00 +0200

Hi admins ,

I have a distributed source attack with ICMP type 8 pack, size =1500 and
flag don't fragment set (DF) from a number of  8-10 sites.
The default policy discards this requests, but before contacting the
admins of this sites, do you know any similar reports or modified binary
that generates this type of traffic ?
here is a log extract of this activity :

-----------------------////////
Sep 21 11:00:20 iplist kernel: Packet log: input DENY eth0 PROTO=1
SS.SS.SS.SS:8 193.230.133.6:0 L=1500 S=0x00 I=36059 F=0x4000 T=233
-------------------------///////

11:38:03.748034 212.206.88.45 > bamse.osim.ro: icmp: echo request (DF)
(ttl 234, id 3266)
                         4500 05dc 0cc2 4000 ea01 0a76 SSSS SSSS
                         c1e6 8506 0800 f7ff 0000 0000 0000 0000
                         0000 0000 0000 0000 0000 0000 0000 0000
                         0000 0000 0000


any ideeas would be apreciated

gabi jipa



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