Date: Thu, 25 Sep 2014 11:24:01 -0700 From: Laszlo Danielisz <laszlo.danielisz@yahoo.com> To: "freebsd-pf@freebsd.org" <freebsd-pf@freebsd.org> Subject: referer filtering Message-ID: <1411669441.95769.YahooMailNeo@web160705.mail.bf1.yahoo.com>
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Hi, I was wondering how is possible to accept a connection, lets say on port 80 only if it comes from a specified referer. Let's say there is a link on server A (IP 1.1.1.1) pointing to server B (IP 2.2.2.2). And server B will only accept the connection if it was sent by A. Any ideas? Thx! Laszlo From owner-freebsd-pf@FreeBSD.ORG Thu Sep 25 19:45:35 2014 Return-Path: <owner-freebsd-pf@FreeBSD.ORG> Delivered-To: freebsd-pf@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:1900:2254:206a::19:1]) (using TLSv1 with cipher ADH-AES256-SHA (256/256 bits)) (No client certificate requested) by hub.freebsd.org (Postfix) with ESMTPS id 1FC79FCE for <freebsd-pf@freebsd.org>; Thu, 25 Sep 2014 19:45:35 +0000 (UTC) Received: from mail.smarty.az (mail.smarty.az [109.235.196.155]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (Client did not present a certificate) by mx1.freebsd.org (Postfix) with ESMTPS id C16526A1 for <freebsd-pf@freebsd.org>; Thu, 25 Sep 2014 19:45:33 +0000 (UTC) Received: from [192.168.1.202] (pop-shaki-199.azeronline.com [62.217.138.199]) (using TLSv1 with cipher RC4-MD5 (128/128 bits)) (No client certificate requested) by mail.smarty.az (Postfix) with ESMTPSA id 98FBB1FEABFC for <freebsd-pf@freebsd.org>; Fri, 26 Sep 2014 00:37:37 +0500 (AZST) Date: Fri, 26 Sep 2014 00:37:31 +0500 Subject: Re: referer filtering From: Javad Mustafayev <javad@smarty.az> To: Laszlo Danielisz via freebsd-pf <freebsd-pf@freebsd.org> MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: base64 X-BeenThere: freebsd-pf@freebsd.org X-Mailman-Version: 2.1.18-1 Precedence: list List-Id: "Technical discussion and general questions about packet filter \(pf\)" <freebsd-pf.freebsd.org> List-Unsubscribe: <http://lists.freebsd.org/mailman/options/freebsd-pf>, <mailto:freebsd-pf-request@freebsd.org?subject=unsubscribe> List-Archive: <http://lists.freebsd.org/pipermail/freebsd-pf/>; List-Post: <mailto:freebsd-pf@freebsd.org> List-Help: <mailto:freebsd-pf-request@freebsd.org?subject=help> List-Subscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-pf>, <mailto:freebsd-pf-request@freebsd.org?subject=subscribe> X-List-Received-Date: Thu, 25 Sep 2014 19:45:35 -0000 SGksIGkgY2FuIHN1Z2dlc3QgY29uZmlnIGJlbG93CgpsZXRzIHNheSB0aGlzIGNvbmZpZyB3aWxs IGJlIG9uIHNlcnZlciBCJ3MgcGYuY29uZi4gYW5kIHlvdXIgbmV0d29yayBpbnRlcmZhY2Ugb2Yg QiBpcCBhZGRyZXNzIDIuMi4yLjIgaXMgYmdlMAoKdGhlbiB5b3UgY2FuIHVzZSB0aGUgZm9sbG93 aW5nIGNvbmZpZwoKI3BmLmNvbmYKI21hY3JvcwoKZXh0X2lmPSJiZ2UwIgpBPSIxLjEuMS4xIgpC PSIyLjIuMi4yIgoKI2dsb2JhbCBvcHRpb25zCnNldCBibG9jay1wb2xpY3kgcmV0dXJuICNvciB5 b3UgY2FuIHVzZSBkcm9wCnNldCBza2lwIG9uIGxvMApzZXQgbG9naW50ZXJmYWNlICRleHRfaWYg I29wdGlvbmFsCgojYWxsIG90aGVyIGNvbmZpZ3VyYXRpb25zCgojaGVyZSB5b3UgYmxvY2sgYWxs CgpibG9jayByZXR1cm4gaW4gYWxsICNvciB5b3UgY2FuIHVzZSBkcm9wIDopCgojYW5kIGhlcmUg YWxsb3cgVENQIGNvbm5lY3Rpb25zIG9uIHBvcnQgODAgb25seSBmcm9tIEEoMS4xLjEuMSkgdG8g QigyLjIuMi4yKQoKcGFzcyBpbiBsb2cgb24gJGV4dF9pZiBpbmV0IHByb3RvIHRjcCBmcm9tICRB IHRvICRCIHBvcnQgODAga2VlcCBzdGF0ZQoKdGhhdCdzIGFsbC4gaXRzIHNvIHNpbXBsZSBjb25m aWd1cmF0aW9uIGZpbGUuIHlvdSBjYW4gZmluZCBtb3JlIGFkdmFuY2VkIGFuZCBmYW5jeSBjb25m aWd1cmF0aW9uIG1vZGVscyBvbiB0aGUgd2ViLiBidXQgaSBzdWdnZXN0IHBmIG1hbnVhbCA7KSAK Z29vZCBsdWNrLgotLQoK4oCi4oCi4oCiLwpuYW1lOsKgwqDCoMKgwqDCoMKgwqDCoMKgwqDCoMKg wqDCoMKgwqDCoMKgwqDCoMKgIEphdmFkIE11c3RhZmF5ZXYKdGl0bGU6wqDCoMKgwqDCoMKgwqDC oMKgwqDCoMKgwqDCoMKgwqDCoMKgwqAgU3lzdGVtIEFkbWluaXN0cmF0b3IKY29tcGFueTrCoMKg wqDCoMKgwqDCoMKgwqDCoMKgwqDCoMKgwqDCoMKgwqDCoMKgwqDCoMKgwqDCoMKgwqAgU21hcnR5 IExMQwptb2JpbGU6wqDCoMKgwqDCoMKgwqDCoMKgwqDCoMKgwqDCoMKgwqAgMDA5OTQuNTEuOTI3 LjExLjk5Cm1haWw6wqDCoMKgwqDCoMKgwqDCoMKgwqDCoMKgwqDCoMKgwqDCoMKgwqDCoMKgwqDC oMKgwqDCoCBqYXZhZEBzbWFydHkuYXoKd2ViLm1haWw6wqDCoMKgIGoubXVzdGFmYXlldkBnbWFp bC5jb20KwqDigKLigKLigKIvCsKgCgpPbiBTZXAgMjUsIDIwMTQgMTE6MjQgUE0sIExhc3psbyBE YW5pZWxpc3ogdmlhIGZyZWVic2QtcGYgPGZyZWVic2QtcGZAZnJlZWJzZC5vcmc+IHdyb3RlOgo+ Cj4gSGksIAo+Cj4gSSB3YXMgd29uZGVyaW5nIGhvdyBpcyBwb3NzaWJsZSB0byBhY2NlcHQgYSBj b25uZWN0aW9uLCBsZXRzIHNheSBvbiBwb3J0IDgwIG9ubHkgaWYgaXQgY29tZXMgZnJvbSBhIHNw ZWNpZmllZCByZWZlcmVyLiAKPiBMZXQncyBzYXkgdGhlcmUgaXMgYSBsaW5rIG9uIHNlcnZlciBB IChJUCAxLjEuMS4xKSBwb2ludGluZyB0byBzZXJ2ZXIgQiAoSVAgMi4yLjIuMikuIEFuZCBzZXJ2 ZXIgQiB3aWxsIG9ubHkgYWNjZXB0IHRoZSBjb25uZWN0aW9uIGlmIGl0IHdhcyBzZW50IGJ5IEEu IAo+Cj4gQW55IGlkZWFzPyAKPgo+IFRoeCEgCj4gTGFzemxvIAo+IF9fX19fX19fX19fX19fX19f X19fX19fX19fX19fX19fX19fX19fX19fX19fX19fIAo+IGZyZWVic2QtcGZAZnJlZWJzZC5vcmcg bWFpbGluZyBsaXN0IAo+IGh0dHA6Ly9saXN0cy5mcmVlYnNkLm9yZy9tYWlsbWFuL2xpc3RpbmZv L2ZyZWVic2QtcGYgCj4gVG8gdW5zdWJzY3JpYmUsIHNlbmQgYW55IG1haWwgdG8gImZyZWVic2Qt cGYtdW5zdWJzY3JpYmVAZnJlZWJzZC5vcmciIAo=
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