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Document setcap

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Jeremy Rand 2021-10-02 17:14:15 +00:00
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README.md
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@ -91,7 +91,9 @@ ${HOME}/go/bin/dnsseeder -p <dns.port.to.listen.on> -v -w 8880 -netfile ${1} 2>&
## RUNNING AS NON-ROOT ## RUNNING AS NON-ROOT
Typically, you'll need root privileges to listen to port 53 (name service). Typically, you'll need root privileges to listen to port 53 (name service). Some potential solutions:
### iptables
One solution is using an iptables rule (Linux only) to redirect it to One solution is using an iptables rule (Linux only) to redirect it to
a non-privileged port: a non-privileged port:
@ -101,6 +103,11 @@ $ iptables -t nat -A PREROUTING -p udp --dport 53 -j REDIRECT --to-port 5353
If properly configured, this will allow you to run dnsseeder in userspace, using If properly configured, this will allow you to run dnsseeder in userspace, using
the -p 5353 option. the -p 5353 option.
### setcap
On Linux, another solution is running the following command to authorize dnsseeder to bind to privileged ports.
$ sudo setcap 'cap_net_bind_service=+ep' ${HOME}/go/bin/dnsseeder
## License ## License