My one tech tweet for the day (week?) Okay... TIL by sheer accident that my router can act as a nameserver. And it works! Is this common for home routers?
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Yes, almost every home router will run a DNS proxy (often caching) forwarding to your ISP's nameservers by default, and some may also serve LAN computers under <dhcp hostname>.lan or something like that.
If you mean externally accessible though, no, they're not supposed to have DNS open on the WAN interface by default.
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I was setting up ppp over a serial link today (... don't ask), and I got everything set up correctly but couldn't connect to the Internet. I looked at an old known-to-work resolv.conf and realized I didn't have a nameserver set up. The nameserver was my router.
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Yup, they usually put their own IP in the DHCP nameserver option field, so LAN computers will proxy through it by default.
End of conversation
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