Date: Sun, 25 Oct 2015 11:17:09 -0400 From: "Michael B. Eichorn" <ike@michaeleichorn.com> To: Ernie Luzar <luzar722@gmail.com>, freebsd-questions <freebsd-questions@freebsd.org> Subject: Re: promiscuous mode messages Message-ID: <1445786229.29271.14.camel@michaeleichorn.com> In-Reply-To: <562CCC10.80509@gmail.com> References: <562CCC10.80509@gmail.com>
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[-- Attachment #1 --] On Sun, 2015-10-25 at 08:33 -0400, Ernie Luzar wrote: > Hello list > > I was reviewing the console log [/var/og/messages] and noticed these > messages. > > xlo: promiscuous mode enabled > xlo: promiscuous mode disabled > xlo: promiscuous mode enabled > xlo: promiscuous mode disabled > xlo: promiscuous mode enabled > xlo: promiscuous mode disabled > xlo: promiscuous mode enabled > xlo: promiscuous mode disabled > > Now to my knowledge I did nothing to cause this. > xl0 is the interface facing the public internet. Are you sure? Lots of networking/monitoring tools use promiscuous mode. In fact enabled/diabled like that is exactly what you will get if you run tcpdump without the -p option. > Could this have been a remote attacker? Not really. Promiscuous mode requires root to enable/disable. An attacker would need to be logged in and get root. Anyway try correlating the timestamps on /var/log/messages with /var/log/auth.log > How to disable xl0 from being able to enter promiscuous mode? Requires root to use already. Against a user with root resistance is futile. [-- Attachment #2 --] 0 *H 010 `He 0 *H 000]0 *H 01 0 UIL10U StartCom Ltd.1+0)U "Secure Digital Certificate Signing1806U/StartCom Class 1 Primary Intermediate Client CA0 150613202446Z 160614003550Z0H1 0 U ike@michaeleichorn.com1%0# *H ike@michaeleichorn.com0"0 *H 0 UՀ,k9D %Z|Y6J<rrK g;&|uNlUE9)V.[ט̊:qS](#v SYDz* CpugYݔ,v<`j(w aS#ڒ6n(K5'KVLåErv< J=[}W bLA%gޭnVb| I?M7D :$׃bM_T[,ƃ\ 00 U 0 0 U 0 U %0++0 U jj: γ+39啖0 U #0Sr풜\|~5NԸQ0!U 0ike@michaeleichorn.com0LU C0?0; +70*0.+"http://www.startssl.com/policy.pdf0+00' StartCom Certification Authority0This certificate was issued according to the Class 1 Validation requirements of the StartCom CA policy, reliance only for the intended purpose in compliance of the relying party obligations.06U /0-0+)'%http://crl.startssl.com/crtu1-crl.crl0+009+0-http://ocsp.startssl.com/sub/class1/client/ca0B+06http://aia.startssl.com/certs/sub.class1.client.ca.crt0#U 0http://www.startssl.com/0 *H x+ȐF}pw.X vF?rg P]EOp)L˻yA ;hi0u2]m [Sbp$_ gr Xm*YP3 #H>mKAǠt)HO|=@} 3ӝ'iO81> 03 v'h5U "H;ECZtpҗ4rWHu^6+i*kJL8shAV|5;?HMc\ j[j|+000]0 *H 01 0 UIL10U StartCom Ltd.1+0)U "Secure Digital Certificate Signing1806U/StartCom Class 1 Primary Intermediate Client CA0 150613202446Z 160614003550Z0H1 0 U ike@michaeleichorn.com1%0# *H ike@michaeleichorn.com0"0 *H 0 UՀ,k9D %Z|Y6J<rrK g;&|uNlUE9)V.[ט̊:qS](#v SYDz* CpugYݔ,v<`j(w aS#ڒ6n(K5'KVLåErv< J=[}W bLA%gޭnVb| I?M7D :$׃bM_T[,ƃ\ 00 U 0 0 U 0 U %0++0 U jj: γ+39啖0 U #0Sr풜\|~5NԸQ0!U 0ike@michaeleichorn.com0LU C0?0; +70*0.+"http://www.startssl.com/policy.pdf0+00' StartCom Certification Authority0This certificate was issued according to the Class 1 Validation requirements of the StartCom CA policy, reliance only for the intended purpose in compliance of the relying party obligations.06U /0-0+)'%http://crl.startssl.com/crtu1-crl.crl0+009+0-http://ocsp.startssl.com/sub/class1/client/ca0B+06http://aia.startssl.com/certs/sub.class1.client.ca.crt0#U 0http://www.startssl.com/0 *H x+ȐF}pw.X vF?rg P]EOp)L˻yA ;hi0u2]m [Sbp$_ gr Xm*YP3 #H>mKAǠt)HO|=@} 3ӝ'iO81> 03 v'h5U "H;ECZtpҗ4rWHu^6+i*kJL8shAV|5;?HMc\ j[j|+040 0 *H 0}1 0 UIL10U StartCom Ltd.1+0)U "Secure Digital Certificate Signing1)0'U StartCom Certification Authority0 071024210155Z 171024210155Z01 0 UIL10U StartCom Ltd.1+0)U "Secure Digital Certificate Signing1806U/StartCom Class 1 Primary Intermediate Client CA0"0 *H 0 -).2AUGo#G B|NDRpM-B=o -we5JQpa>O.#._<V [~**pz~3WG .ᘟMlr[<Ce6fqO"uxfWN#uicgkv$Lb%y`_{`xK'GN 00U 00U 0 U Sr풜\|~5NԸQ0 U #0N @[i04hCA0f+Z0X0'+0http://ocsp.startssl.com/ca0-+0!http://www.startssl.com/sfsca.crt0[U T0R0'%#!http://www.startssl.com/sfsca.crl0'%#!http://crl.startssl.com/sfsca.crl0U y0w0u +70f0.+"http://www.startssl.com/policy.pdf04+(http://www.startssl.com/intermediate.pdf0 *H }x,\c^ #wMq}>UK/^yX֏y frMIŲB61ymQҨݬZ0& ;@#13qۑ& ̢o 6r_;GO>*I( 74XS1r3)!LJy6Kotˆ# _wSr ;B ADp(fs 䰷6%.W0J3:bC<8t X1<Cn=t==wST~\wkBf|15zUP)(IjVB!OfI=bb\4-*em/нSJm7N[]'@ڽ D9Kr>R7/|o^I@ټ'Pa $ z9a'L)( I}vcH]۸D*W} m>Q|C.(,lQ10001 0 UIL10U StartCom Ltd.1+0)U "Secure Digital Certificate Signing1806U/StartCom Class 1 Primary Intermediate Client CA]0 `He 0 *H 1 *H 0 *H 1 151025151709Z0O *H 1B@l9IB&*.LQL+! a$T \1ؑRQO(:lºҒ1CL0 +71001 0 UIL10U StartCom Ltd.1+0)U "Secure Digital Certificate Signing1806U/StartCom Class 1 Primary Intermediate Client CA]0 *H 101 0 UIL10U StartCom Ltd.1+0)U "Secure Digital Certificate Signing1806U/StartCom Class 1 Primary Intermediate Client CA]0 *H k3{˗mE5TfW4߸d!jA ǬawW^G;p5Hܯ y+ -ҍm,$6 #[U{IOUf DA 2+O!p0 x?!myfVc '( W9oDzu _ k嚸MVs;UJtє+9=F1̮6:-$5
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