From owner-freebsd-security Mon Nov 15 4: 8:20 1999 Delivered-To: freebsd-security@freebsd.org Received: from adm.sci-nnov.ru (adm.sci-nnov.ru [195.122.226.2]) by hub.freebsd.org (Postfix) with ESMTP id D277C14C89 for ; Mon, 15 Nov 1999 04:08:08 -0800 (PST) (envelope-from vlad@sandy.ru) Received: from anonymous.sandy.ru (anonymous.sandy.ru [195.122.226.12]) by adm.sci-nnov.ru (8.9.3/Dmiter-4.1) with ESMTP id PAA64035; Mon, 15 Nov 1999 15:03:18 +0300 (MSK) Date: Mon, 15 Nov 1999 15:03:22 +0300 From: Vladimir Dubrovin X-Mailer: The Bat! (v1.34) S/N D33CD428 Reply-To: Vladimir Dubrovin Organization: Sandy Info X-Priority: 3 (Normal) Message-ID: <19627.991115@sandy.ru> To: "Francisco Reyes" Cc: freebsd-security@FreeBSD.ORG Subject: Re: Is this an attack? ICMP packets coming from my own IP In-reply-To: <199911151140.GAA50607@sanson.reyes.somos.net> References: <199911151140.GAA50607@sanson.reyes.somos.net> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit Sender: owner-freebsd-security@FreeBSD.ORG Precedence: bulk X-Loop: FreeBSD.org 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