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My fiber optical modem broadcasts a poem via ethernet frame 0x8300

189 点作者 riobard超过 4 年前

12 条评论

bityard超过 4 年前
This story is slightly munged due to my own faulty memory and to obfuscate the guilty parties...<p>The company I work for develops network appliances for large backbone and provider networks. One of the things these appliances do is maintain a &quot;hearbeat&quot; with each other so that if one disappears, the others know about it and can send an alert to the NOC.<p>The heartbeat packets themselves needed some kind of payload, even though the payload was not important. At that time, the company was still a small and scrappy startup so humor was generally encouraged. So naturally the engineer decided the payload should be a random line from a list of pirate quotes. Ship-its all around and the feature made it into the next major product release.<p>A couple months later, a very angry call comes into the helpdesk from someone _very_ high up in the food chain of a major U.S. telecom. It turns out they had noticed the pirate quotes in a random packet dump they were looking at and the network team spent a whole weekend thinking their network was very deeply compromised because our appliances were one of the tools they were using to inspect the network and kept seeing the &quot;Yarr, Matey!&quot; and such everywhere they looked.<p>Needless to say, the pirate quotes went away in a few days as part of an emergency patch and the heartbeat message was changed to something more mundane but less likely to trigger heart attacks in our customers.
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riobard超过 4 年前
I&#x27;m the owner of the modem. I&#x27;ve found about this a couple of months back when I moved the modem to its own vlan and noticed the broadcast frames. I did some research into the author of the poem on Twitter (<a href="https:&#x2F;&#x2F;twitter.com&#x2F;riojot&#x2F;status&#x2F;1268821579724541954" rel="nofollow">https:&#x2F;&#x2F;twitter.com&#x2F;riojot&#x2F;status&#x2F;1268821579724541954</a>), but nothing fruitful.<p>If anyone knows how the poem ended up in my modem, or even just what&#x27;s ethertype 0x8300 all about, please comment!
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tifan超过 4 年前
Ah, this is used for loop detection by Huawei CPE.<p>Configuration reference: <a href="http:&#x2F;&#x2F;huawei.communicationsmuseum.org.uk&#x2F;MA5616&#x2F;clireference&#x2F;MA5616%20V800R312C00%20Command%20Reference%2011.chm&#x2F;cmd&#x2F;ring_check_private-ethtype.html" rel="nofollow">http:&#x2F;&#x2F;huawei.communicationsmuseum.org.uk&#x2F;MA5616&#x2F;clireferenc...</a>
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geoah超过 4 年前
Google has a couple of versions that seem like a match.<p>&gt; The day I lost my very first tooth,<p>&gt; Was halfway through grade four,<p>&gt; I&#x27;d run my tongue along the gap,<p>&gt; Where my tooth had been before,<p>&gt; I remember I want home crying,<p>&gt; And showed it to my mum,<p>&gt; She told me that a brand new tooth,<p>&gt; Would grow up in my gum,<p>&gt; In a while the gap would stop feeling strange,<p>&gt; I wouldn&#x27;t notice the tooth was gone,<p>&gt; The only reason I missed it now,<p>&gt; Was because it was there for so long,<p>&gt; Then slowly but surely over the weeks,<p>&gt; In the gap a new tooth grew,<p>&gt; And now it makes me wonder,<p>&gt; If people are like teeth too.<p><a href="https:&#x2F;&#x2F;www.wattpad.com&#x2F;53876107-descend-teeth" rel="nofollow">https:&#x2F;&#x2F;www.wattpad.com&#x2F;53876107-descend-teeth</a>
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bzb6超过 4 年前
Cute and relatable for someone who was dumped recently. :P
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client4超过 4 年前
I always thought it would be a unique method of prayer (for an existing or new religion) that used part of the IPv6 packet header or an ICMP packet. We would be sending prayers at random with a ttyl to be broadcast across existing networks, and routers&#x2F;endpoints could choose to listen.
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daneel_w超过 4 年前
That&#x27;s just under 5KB per minute, or about 200MB per month. Odd.
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doylecnn超过 4 年前
<a href="https:&#x2F;&#x2F;stackoverflow.com&#x2F;questions&#x2F;32870553&#x2F;telling-a-story-with-traceroute-how-does-it-work" rel="nofollow">https:&#x2F;&#x2F;stackoverflow.com&#x2F;questions&#x2F;32870553&#x2F;telling-a-story...</a>
gigatexal超过 4 年前
Why would an ISP do this? Is this some kind of developer Easter egg or some sort of way to track the customer?
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perryizgr8超过 4 年前
Huh! Maybe it is some sort of keepalive beacon. But why not use some normal standard way?
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eznzt超过 4 年前
Can someone translate the filter used in that tcpdump command to wireshark syntax?
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yarosv超过 4 年前
Isn&#x27;t it copyright infringement?