diff --git a/Makefile b/Makefile
index 6eea6ad1b..f0d2d2d87 100644
--- a/Makefile
+++ b/Makefile
@@ -131,10 +131,10 @@ eth2_network_simulation: | build deps clean_eth2_network_simulation_files
 	+ GIT_ROOT="$$PWD" NIMFLAGS="$(NIMFLAGS)" LOG_LEVEL="$(LOG_LEVEL)" tests/simulation/start.sh
 
 clean-testnet0:
-	rm -rf build/data/testnet0
+	rm -rf build/data/testnet0*
 
 clean-testnet1:
-	rm -rf build/data/testnet1
+	rm -rf build/data/testnet1*
 
 # - we're getting the preset from a testnet-specific .env file
 # - try SCRIPT_PARAMS="--skipGoerliKey"
@@ -143,7 +143,7 @@ testnet0 testnet1: | build deps
 		NIM_PARAMS="$(subst ",\",$(NIM_PARAMS))" LOG_LEVEL="$(LOG_LEVEL)" $(ENV_SCRIPT) nim $(NIM_PARAMS) scripts/connect_to_testnet.nims $(SCRIPT_PARAMS) --const-preset=$$CONST_PRESET --dev-build $@
 
 clean-schlesi:
-	rm -rf build/data/shared_schlesi
+	rm -rf build/data/shared_schlesi*
 
 schlesi: | build deps
 	NIM_PARAMS="$(subst ",\",$(NIM_PARAMS))" LOG_LEVEL="$(LOG_LEVEL)" $(ENV_SCRIPT) nim $(NIM_PARAMS) scripts/connect_to_testnet.nims $(SCRIPT_PARAMS) shared/schlesi
@@ -152,7 +152,7 @@ schlesi-dev: | build deps
 	NIM_PARAMS="$(subst ",\",$(NIM_PARAMS))" LOG_LEVEL="DEBUG; TRACE:discv5,networking; REQUIRED:none; DISABLED:none" $(ENV_SCRIPT) nim $(NIM_PARAMS) scripts/connect_to_testnet.nims $(SCRIPT_PARAMS) shared/schlesi
 
 clean-witti:
-	rm -rf build/data/shared_witti
+	rm -rf build/data/shared_witti*
 
 witti: | build deps
 	NIM_PARAMS="$(subst ",\",$(NIM_PARAMS))" LOG_LEVEL="$(LOG_LEVEL)" $(ENV_SCRIPT) nim $(NIM_PARAMS) scripts/connect_to_testnet.nims $(SCRIPT_PARAMS) shared/witti
@@ -161,7 +161,7 @@ witti-dev: | build deps
 	NIM_PARAMS="$(subst ",\",$(NIM_PARAMS))" LOG_LEVEL="DEBUG; TRACE:discv5,networking; REQUIRED:none; DISABLED:none" $(ENV_SCRIPT) nim $(NIM_PARAMS) scripts/connect_to_testnet.nims $(SCRIPT_PARAMS) shared/witti
 
 clean: | clean-common
-	rm -rf build/{$(TOOLS_CSV),all_tests,*_node,*ssz*,beacon_node_testnet*,block_sim,state_sim,transition*}
+	rm -rf build/{$(TOOLS_CSV),all_tests,*_node,*ssz*,beacon_node_*,block_sim,state_sim,transition*}
 ifneq ($(USE_LIBBACKTRACE), 0)
 	+ $(MAKE) -C vendor/nim-libbacktrace clean $(HANDLE_OUTPUT)
 endif
diff --git a/README.md b/README.md
index 06483e11e..59c83f42a 100644
--- a/README.md
+++ b/README.md
@@ -113,6 +113,20 @@ make witti           # This will build Nimbus and all other dependencies
                      # and connect you to Witti
 ```
 
+Sometimes, you may want to disable the interactive prompt asking you for a Goerli key in order to become a validator:
+
+```bash
+make SCRIPT_PARAMS="--skipGoerliKey" witti # not a validator
+```
+
+You can also start multiple local nodes, in different terminal windows/tabs, by specifying their numeric IDs:
+
+```bash
+make SCRIPT_PARAMS="--nodeID=0" witti # the default
+make SCRIPT_PARAMS="--nodeID=1" witti
+make SCRIPT_PARAMS="--nodeID=2" witti
+```
+
 ### Getting metrics from a local testnet client
 
 ```bash
@@ -123,7 +137,8 @@ make NIMFLAGS="-d:insecure" witti
 You can now see the raw metrics on http://127.0.0.1:8008/metrics but they're not very useful like this, so let's feed them to a Prometheus instance:
 
 ```bash
-prometheus --config.file=build/data/shared_witti/prometheus.yml
+prometheus --config.file=build/data/shared_witti_0/prometheus.yml
+# when starting multiple nodes at the same time, just use the config file from the one with the highest ID
 ```
 
 For some pretty pictures, get [Grafana](https://grafana.com/) up and running, then import the dashboard definition in "grafana/beacon\_nodes\_Grafana\_dashboard.json".
diff --git a/scripts/connect_to_testnet.nims b/scripts/connect_to_testnet.nims
index ddc427349..462ac6204 100644
--- a/scripts/connect_to_testnet.nims
+++ b/scripts/connect_to_testnet.nims
@@ -34,6 +34,15 @@ cli do (skipGoerliKey {.
           desc: "Enables more extensive logging and debugging support"
           name: "dev-build" .} = false,
 
+        nodeID {.
+          desc: "Node ID" .} = 0.int,
+
+        basePort {.
+          desc: "Base TCP/UDP port (nodeID will be added to it)" .} = 9000.int,
+
+        baseMetricsPort {.
+          desc: "Base metrics port (nodeID will be added to it)" .} = 8008.int,
+
         testnetName {.argument .}: string):
   let
     nameParts = testnetName.split "/"
@@ -84,7 +93,7 @@ cli do (skipGoerliKey {.
   let
     dataDirName = testnetName.replace("/", "_")
                              .replace("(", "_")
-                             .replace(")", "_")
+                             .replace(")", "_") & "_" & $nodeID
     dataDir = buildDir / "data" / dataDirName
     validatorsDir = dataDir / "validators"
     secretsDir = dataDir / "secrets"
@@ -123,7 +132,7 @@ cli do (skipGoerliKey {.
   mkDir dataDir
 
   # macOS may not have gnu-getopts installed and in the PATH
-  execIgnoringExitCode &"""./scripts/make_prometheus_config.sh --nodes 1 --base-metrics-port 8008 --config-file "{dataDir}/prometheus.yml""""
+  execIgnoringExitCode &"""./scripts/make_prometheus_config.sh --nodes """ & $(1 + nodeID) & &""" --base-metrics-port {baseMetricsPort} --config-file "{dataDir}/prometheus.yml""""
 
   exec &"""nim c {nimFlags} -d:"const_preset={preset}" -o:"{beaconNodeBinary}" beacon_chain/beacon_node.nim"""
 
@@ -159,7 +168,10 @@ cli do (skipGoerliKey {.
     --data-dir="{dataDir}"
     --dump
     --web3-url={web3Url}
+    --tcp-port=""" & $(basePort + nodeID) & &"""
+    --udp-port=""" & $(basePort + nodeID) & &"""
     --metrics
+    --metrics-port=""" & $(baseMetricsPort + nodeID) & &"""
     {bootstrapFileOpt}
     {logLevelOpt}
     {depositContractOpt}