Re: Is it correct to think of interfaces vs routers as in "where the packet ends up going"?
Phil Whineray <[email protected]> Thu, 3 Jan 2019 18:41:00 +0000
| Newsgroups | gmane.comp.security.firewalls.firehol.user |
|---|---|
| Message-ID | <20190103184100.GA12694@xps> |
SGkKCk9uIFRodSwgSmFuIDAzLCAyMDE5IGF0IDAxOjA2OjM4UE0gKzAxMDAsIFdvanRlayBTd2lh dGVrIHdyb3RlOgo+IEhlbGxvIGV2ZXJ5b25lCj4gCj4gSSBhbSB0cnlpbmcgdG8gbWFrZSBzZW5z ZSBhZ2FpbiBvZiBpbnRlcmZhY2UgdnMgcm91dGVyIGFmdGVyIHJlYWRpbmcgYSBmZXcKPiB0aW1l cyBodHRwczovL2ZpcmVob2wub3JnL2d1aWRlcy9maXJlaG9sLXdlbGNvbWUvCj4gCj4gSWYgd2Ug YXNzdW1lIHRoZSBmb2xsb3dpbmcgdG9wb2xvZ3kgd2l0aCB0aHJlZSBob3N0cywgdGhlIG1pZGRs ZSBvbmUgaGF2aW5nCj4gdHdvIGludGVyZmFjZXM6Cj4gCj4gWzEwLjAuMC4xXSAtLS0gW2V0aDAg PSAxMC4wLjAuMjU0ICAgZXRoMSA9IDEwLjEuMS4yNTRdIC0tLSBbMTAuMS4xLjFdCj4gCj4gdGhl cmUgYXJlIHNlcnZpY2VzIHdoaWNoIHByb2R1Y2UgYW5kIGNvbnN1bWUgcGFja2V0cyBvbiBlYWNo IG9mIHRoZQo+IGludGVyZmFjZXMgKG9uIGVhY2ggb2YgdGhlIGhvc3RzKS4gSSB3aWxsIHRyeSB0 byBzdW1tYXJpemUgdGhlIHBvc3NpYmxlCj4gY2FzZXMgZm90IHRyYWZmaWMgZmFtaWxpZXM6Cj4g Cj4gMTAuMC4wLjEgLT4gMTAuMS4xLjEgLSBtYW5hZ2VkIHZpYSAicm91dGVyIiBiZWNhdXNlIHRo ZSBwYWNrZXRzIGVudGVyIGV0aDAKPiBhbmQgbGVhdmUgdmlhIGV0aDEgd2l0aG91dCBvdGhlciBp bnRlcmFjdGlvbnMgd2l0aCB0aGUgZmlyZXdhbGwKPiAxMC4wLjAuMjU0IC0+IDEwLjEuMS4yNTQg LSBtYW5hZ2VkIGJ5ICJpbnRlcmZhY2UiIGFzIGFsbCB0cmFmZmljIGlzIGxvY2FsLAo+IG5ldmVy IGxlYXZlcyB0aGUgZmlyZXdhbGwKPiAxMC4wLjAuMSAtPiAxMC4wLjAuMjU0IC0gbWFuYWdlZCAi aW50ZXJmYWNlIiBhcyB0aGUgcGFja2V0IGVudGVycyB0aGUKPiBmaXJld2FsbCBidXQgc3RvcHMg YXQgdGhlIGVudGVyaW5nIGludGVyZmFjZQo+IAo+IE5vdyB0aGUgb25lcyBJIHN0cnVnZ2xlIHdp dGg6CgpGb3IgYW4gImludGVyZmFjZSIgZmlyZWhvbCBnZW5lcmF0ZXMgSU5QVVQgYW5kIE9VVFBV VCBpcHRhYmxlcyBydWxlcwphbmQgZm9yIGEgInJvdXRlciIgaXQgZ2VuZXJhdGVzIEZPUldBUkQg cnVsZXMuCgpUaGUgcmVzdCBvZiB0aGUgYmVoYXZpb3VyIGlzIGRldGVybWluZWQgYnkgbmV0Zmls dGVyIGFuZCBMaW51eC4gV2hhdApkb2VzIHRoYXQgbWVhbiBpbiBwcmFjdGljZT8KCjEuIEFueSBw YWNrZXQgd2hpY2ggaXMgZGVzdGluZWQgZm9yIHRoaXMgaG9zdCB3aW5kcyB1cCBpbiBhbiBpbnRl cmZhY2UKICAgKG9yIGdldHMgZHJvcHBlZCBmb3Igbm90IG1hdGNoaW5nIGFuIGludGVyZmFjZSkK CjIuIEFueSBvdGhlciBwYWNrZXQgaXMgaGFuZGxlZCBieSBhIHJvdXRlciAob3IgaXMgZHJvcHBl ZCBmb3Igbm90CiAgIG1hdGNoaW5nIG9uZSkKCj4gMTAuMC4wLjI1NCAtPiAxMC4wLjAuMSAtIEkg ZG8gbm90IGtub3c6IG9uIHRoZSBvbmUgaGFuZSB0aGUgdHJhZmZpYyBnb2VzCj4gdGhyb3VnaCB0 aGUgZmlyZXdhbGwgKG9yIGF0IGxlYXN0IC0gbGVhdmVzIGl0KSwgYnV0IG9uIHRoZSBvdGhlciBo YW5kIGl0Cj4gZG9lcyBub3QgImNyb3NzIiBpdCwgdGhhdCBpcyBvbmx5IG9uZSBpbnRlcmZhY2Ug aXMgdXNlZAoKVGhpcyBjYXNlIGlzIHNpbXBsZSAtIGl0IGlzIGp1c3QgKDEpIGFib3ZlLgoKPiAx MC4wLjAuMSAtPiAxMC4xLjEuMjU0IC0gSSBkbyBub3Qga25vdzogdGhlIHBhY2tldCBlbnRlcnMg dGhlIGZpcmV3YWxsLAo+IGdvZXMgZnJvbSBvbmUgaW50ZXJmYWNlIHRvIGFub3RoZXIgYnV0IGRv ZXMgbm90IGxlYXZlIHRoZSBmaXJld2FsbCAoYWdhaW4sCj4gbm8gImNyb3NzaW5nIikKPgo+IElu IG90aGVyIHdvcmRzOiBpcyB0aGUgcnVsZSB0aGF0IGEgcGFja2V0IG11c3QgY29tZSBpbiBhbmQg b3V0IGZyb20gYQo+IGZpcmV3YWxsIHRvIGJlIG1hbmFnZWQgYnkgInJvdXRlciIgYW5kIGFueSBv dGhlciBjYXNlIGlzIG1hbmFnZWQgYnkgdGhlCj4gImludGVyZmFjZSIgd2hpY2ggZXZlbnR1YWxs eSByZWNlaXZlcyB0aGUgcGFja2V0IChldmVuIGlmIGl0IHdlbnQgdGhyb3VnaAo+IGFub3RoZXIg b25lIG9uIHRoZSB3YXkpPwoKVGhhdCdzIGEgZmFpciBzdW1tYXJ5IGV4Y2VwdCBmb3IgdGhlIGxh c3QgYml0OgoKVGhlIHBhY2tldCBkb2VzIG5vdCByZWFsbHkgY3Jvc3MgdGhlIGZpcmV3YWxsIGlu IGFueSBzZW5zZSwgd2hlbiBpdAphcnJpdmVzIGl0IGRvZXNuJ3QgbWF0dGVyIHdoYXQgcGh5c2lj YWwgKG9yIHZpcnR1YWwpIGRldmljZSBpdCBhcnJpdmVzCm9uLCBpZiB0aGUgSVAgbWF0Y2hlcyBh bnkgYmVsb25naW5nIHRvIHRoZSBtYWNoaW5lIGl0IHdpbGwgYmUgaGFuZGxlZAp2aWEgSU5QVVQs IHNvIGl0IGlzIHN0aWxsICgxKS4KClRoZSBJUHMgYXNzaWduZWQgdG8gZGV2aWNlcyBvbmx5IHJl YWxseSBtYXR0ZXIgZm9yIHRoZSBuZXR3b3JrCmNvbW11bmljYXRpb25zIHRoZW1zZWx2ZXMsIGku ZS4gd2hhdCBJUCB0byBnaXZlIHRvIGFuIG91dGdvaW5nCmNvbm5lY3Rpb24sIHdoYXQgQVJQIHJl c3BvbnNlcyB0byBnaXZlIGV0Yy4KCkZvciB0aG9zZSB3aG8gd2FudCB0byB1bmRlcnN0YW5kIGhv dyBOQVQgYWZmZWN0cyB0aGluZ3MsIHRoZSBETkFUCihwcmVyb3V0aW5nIE5BVCkgZ2V0cyBhcHBs aWVkIGJlZm9yZSB0aGUgZGVzdGluYXRpb24gKElOUFVUIG9yIEZPUldBUkQpCmRlY2lzaW9uIGlz IG1hZGUgYW5kIHRoZSBTTkFUIChwb3N0cm91dGluZyBOQVQpIGFmdGVyIHRoZSBGT1JXQVJEL09V VFBVVApkZWNpc2lvbi4gVGhpcyBkaWFncmFtIHNob3dzIHRoZSBnb3J5IGRldGFpbDoKCmh0dHA6 Ly91cGxvYWQud2lraW1lZGlhLm9yZy93aWtpcGVkaWEvY29tbW9ucy8zLzM3L05ldGZpbHRlci1w YWNrZXQtZmxvdy5zdmcKCkhvcGUgdGhhdCBoZWxwcwpQaGlsCl9fX19fX19fX19fX19fX19fX19f X19fX19fX19fX19fX19fX19fX19fX19fX19fCkZpcmVob2wtc3VwcG9ydCBtYWlsaW5nIGxpc3QK RmlyZWhvbC1zdXBwb3J0QGxpc3RzLmZpcmVob2wub3JnCmh0dHA6Ly9saXN0cy5maXJlaG9sLm9y Zy9tYWlsbWFuL2xpc3RpbmZvL2ZpcmVob2wtc3VwcG9ydA==