DNS lookups fail

[revero-doug]

Issue Summary

After following the README instructions on my MacBook Pro (14-inch, 2021) with an M1 Pro chip, targeting a minikube cluster running locally with defaults configured, sshuttle is able to connect to the python containing pod (c : Connected to server.), but when trying to resolve host "echo-echo-server" (helm install echo ealenn/echo-server), I get curl: (6) Could not resolve host: echo-echo-server, and attempts to browse the public internet also fail. I suspect this issue may be related to this old telepresence issue affecting using sshuttle with minikube k8s clusters.

Commands run for reference

sshuttle install

brew install sshuttle
sshuttle --version # 1.1.1

echo server install

helm repo add ealenn https://ealenn.github.io/charts
helm repo update
helm install echo ealenn/echo-server

jumpbox (kuttle pod) run

kubectl run jumpbox --image=alpine:latest --restart=Never -- sh -c 'apk add python3 --update && exec tail -f /dev/null'

in-cluster test with curl

run curl-client pod

kubectl run curl-client --restart=Never --image=alpine:latest -- sh -c 'apk add curl --update && tail -f /dev/null'

exec test curl command

kubectl exec curl-client -- curl --header 'X-ECHO-BODY: cool' echo-echo-server 2>/dev/null
# output: cool

sshuttle command

sshuttle --dns -r jumpboxx -e kuttle 0.0.0.0/0
# output: c : Connected to server.

NOTE: I also tried -N instead of 0.0.0.0/0 to the same effect

local curl test

curl --header 'X-ECHO-BODY: coolcoolcool' echo-echo-server
# output: curl: (6) Could not resolve host: echo-echo-server

also note that attempts to visit e.g. google.com in a local web browser failed