Date: Mon, 15 Nov 1999 15:03:22 +0300 From: Vladimir Dubrovin <vlad@sandy.ru> To: "Francisco Reyes" <fran@reyes.somos.net> Cc: freebsd-security@FreeBSD.ORG Subject: Re: Is this an attack? ICMP packets coming from my own IP Message-ID: <19627.991115@sandy.ru> In-Reply-To: <199911151140.GAA50607@sanson.reyes.somos.net> References: <199911151140.GAA50607@sanson.reyes.somos.net>
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Hello Francisco Reyes, 15.11.99 14:38, you wrote: Is this an attack? ICMP packets coming from my own IP; F> Some days back I ran a news server, Leafnode++, for 2 days. The server got Hijacked because I failed to F> secure it. Ever since I have been paying close attention to my logs. F> I have ICMP packets enabled, but I log them. Last night I noticed numerous ICMP packets, but the ones F> that worried me the most were some coming from an IP which is the IP I use on that box: 207.240.212.43 F> Is this some form of attack? It's your ping of your own machine. icmp:0.0 is ping request icmp:0.8 is ping reply. As you can see every packet is both in and out. F> ipfw: 3100 Accept ICMP:8.0 207.240.212.43 207.240.212.43 out via tun0 F> ipfw: 3100 Accept ICMP:8.0 207.240.212.43 207.240.212.43 in via tun0 F> ipfw: 3100 Accept ICMP:0.0 207.240.212.43 207.240.212.43 out via tun0 F> ipfw: 3100 Accept ICMP:0.0 207.240.212.43 207.240.212.43 in via tun0 F> ipfw: 3100 Accept ICMP:8.0 207.240.212.43 207.240.212.43 out via tun0 F> ipfw: 3100 Accept ICMP:8.0 207.240.212.43 207.240.212.43 in via tun0 F> How can they forge my own IP? Should I mention this to my ISP? F> To Unsubscribe: send mail to majordomo@FreeBSD.org F> with "unsubscribe freebsd-security" in the body of the message +=-=-=-=-=-=-=-=-=+ |Vladimir Dubrovin| | Sandy Info, ISP | +=-=-=-=-=-=-=-=-=+ To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-security" in the body of the message
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