diff --git a/dev-tools/omicron-dev/src/main.rs b/dev-tools/omicron-dev/src/main.rs
index 9fa5ac0fc05..58dbef377e4 100644
--- a/dev-tools/omicron-dev/src/main.rs
+++ b/dev-tools/omicron-dev/src/main.rs
@@ -48,9 +48,18 @@ enum OmicronDevCmd {
 
 #[derive(Clone, Debug, Args)]
 struct RunAllArgs {
-    /// Nexus external API listen port.  Use `0` to request any available port.
+    /// Nexus external API listen port. Use `0` to request any available port.
     #[clap(long, action)]
     nexus_listen_port: Option<u16>,
+    /// CockroachDB listen port. Use `0` to request any available port.
+    #[clap(long)]
+    db_listen_port: Option<u16>,
+    /// Internal DNS listen port. Use `0` to request any available port.
+    #[clap(long)]
+    internal_dns_listen_port: Option<u16>,
+    /// Management gateway listen port. Use `0` to request any available port.
+    #[clap(long)]
+    mgs_listen_port: Option<u16>,
     /// Override the gateway server configuration file.
     #[clap(long, default_value = DEFAULT_SP_SIM_CONFIG)]
     gateway_config: Utf8PathBuf,
@@ -90,7 +99,14 @@ impl RunAllArgs {
         println!("omicron-dev: setting up all services ... ");
         let cptestctx = nexus_test_utils::omicron_dev_setup_with_config::<
             omicron_nexus::Server,
-        >(&mut config, 0, self.gateway_config.clone())
+        >(
+            &mut config,
+            0,
+            self.gateway_config.clone(),
+            self.db_listen_port,
+            self.internal_dns_listen_port,
+            self.mgs_listen_port,
+        )
         .await
         .context("error setting up services")?;
 
diff --git a/nexus/db-queries/src/db/pub_test_utils/crdb.rs b/nexus/db-queries/src/db/pub_test_utils/crdb.rs
index aa06f0681eb..d0fe4608f12 100644
--- a/nexus/db-queries/src/db/pub_test_utils/crdb.rs
+++ b/nexus/db-queries/src/db/pub_test_utils/crdb.rs
@@ -35,6 +35,7 @@ pub async fn test_setup_database(log: &Logger) -> dev::db::CockroachInstance {
     dev::test_setup_database(
         log,
         dev::StorageSource::CopyFromSeed { input_tar },
+        None,
     )
     .await
 }
@@ -45,7 +46,7 @@ pub async fn test_setup_database(log: &Logger) -> dev::db::CockroachInstance {
 pub async fn test_setup_database_empty(
     log: &Logger,
 ) -> dev::db::CockroachInstance {
-    dev::test_setup_database(log, dev::StorageSource::DoNotPopulate).await
+    dev::test_setup_database(log, dev::StorageSource::DoNotPopulate, None).await
 }
 
 /// Wrapper around [`dev::test_setup_database`] which uses a seed tarball
@@ -53,10 +54,12 @@ pub async fn test_setup_database_empty(
 pub async fn test_setup_database_from_seed(
     log: &Logger,
     input_tar: Utf8PathBuf,
+    listen_port: Option<u16>,
 ) -> dev::db::CockroachInstance {
     dev::test_setup_database(
         log,
         dev::StorageSource::CopyFromSeed { input_tar },
+        listen_port,
     )
     .await
 }
diff --git a/nexus/test-utils/src/nexus_test.rs b/nexus/test-utils/src/nexus_test.rs
index a57bf139a9b..c8b470548fb 100644
--- a/nexus/test-utils/src/nexus_test.rs
+++ b/nexus/test-utils/src/nexus_test.rs
@@ -361,8 +361,14 @@ pub async fn omicron_dev_setup_with_config<N: NexusServer>(
     config: &mut NexusConfig,
     extra_sled_agents: u16,
     gateway_config_file: Utf8PathBuf,
+    db_listen_port: Option<u16>,
+    internal_dns_listen_port: Option<u16>,
+    mgs_listen_port: Option<u16>,
 ) -> Result<ControlPlaneTestContext<N>> {
-    let starter = ControlPlaneStarter::<N>::new("omicron-dev", config);
+    let mut starter = ControlPlaneStarter::<N>::new("omicron-dev", config);
+    starter.db_listen_port(db_listen_port);
+    starter.internal_dns_listen_port(internal_dns_listen_port);
+    starter.mgs_listen_port(mgs_listen_port);
 
     let log = &starter.logctx.log;
     debug!(log, "Ensuring seed tarball exists");
diff --git a/nexus/test-utils/src/starter.rs b/nexus/test-utils/src/starter.rs
index 696a40b8e88..9cc3d5cb0fa 100644
--- a/nexus/test-utils/src/starter.rs
+++ b/nexus/test-utils/src/starter.rs
@@ -166,6 +166,10 @@ pub struct ControlPlaneStarter<'a, N: NexusServer> {
     pub password: Option<String>,
 
     pub simulated_upstairs: Arc<sim::SimulatedUpstairs>,
+
+    db_listen_port: Option<u16>,
+    internal_dns_listen_port: Option<u16>,
+    mgs_listen_port: Option<u16>,
 }
 
 type StepInitFn<'a, N> = Box<
@@ -216,9 +220,24 @@ impl<'a, N: NexusServer> ControlPlaneStarter<'a, N> {
             simulated_upstairs: Arc::new(sim::SimulatedUpstairs::new(
                 simulated_upstairs_log,
             )),
+            db_listen_port: None,
+            internal_dns_listen_port: None,
+            mgs_listen_port: None,
         }
     }
 
+    pub fn db_listen_port(&mut self, port: Option<u16>) {
+        self.db_listen_port = port;
+    }
+
+    pub fn internal_dns_listen_port(&mut self, port: Option<u16>) {
+        self.internal_dns_listen_port = port;
+    }
+
+    pub fn mgs_listen_port(&mut self, port: Option<u16>) {
+        self.mgs_listen_port = port;
+    }
+
     pub async fn init_with_steps(
         &mut self,
         steps: Vec<(&str, StepInitFn<'a, N>)>,
@@ -266,7 +285,12 @@ impl<'a, N: NexusServer> ControlPlaneStarter<'a, N> {
             }
             #[cfg(feature = "omicron-dev")]
             PopulateCrdb::FromSeed { input_tar } => {
-                crdb::test_setup_database_from_seed(log, input_tar).await
+                crdb::test_setup_database_from_seed(
+                    log,
+                    input_tar,
+                    self.db_listen_port,
+                )
+                .await
             }
             PopulateCrdb::Empty => crdb::test_setup_database_empty(log).await,
         };
@@ -1200,7 +1224,18 @@ impl<'a, N: NexusServer> ControlPlaneStarter<'a, N> {
     /// Set up an internal DNS server on the first sled agent
     pub async fn start_internal_dns(&mut self) {
         let log = self.logctx.log.new(o!("component" => "internal_dns_server"));
-        let dns = dns_server::TransientServer::new(&log).await.unwrap();
+        let dns_addr = SocketAddrV6::new(
+            Ipv6Addr::LOCALHOST,
+            self.internal_dns_listen_port.unwrap_or(0),
+            0,
+            0,
+        );
+        let dns = dns_server::TransientServer::new_with_address(
+            &log,
+            dns_addr.into(),
+        )
+        .await
+        .unwrap();
 
         let SocketAddr::V6(dns_address) = dns.dns_server.local_address() else {
             panic!("Unsupported IPv4 DNS address");
@@ -1621,7 +1656,7 @@ pub(crate) async fn setup_with_config_impl<N: NexusServer>(
                         builder
                             .start_gateway(
                                 SwitchLocation::Switch0,
-                                None,
+                                builder.mgs_listen_port,
                                 mgs_config,
                             )
                             .boxed()
@@ -1665,7 +1700,7 @@ pub(crate) async fn setup_with_config_impl<N: NexusServer>(
                             builder
                                 .start_gateway(
                                     SwitchLocation::Switch1,
-                                    None,
+                                    builder.mgs_listen_port,
                                     gateway_config_file,
                                 )
                                 .boxed()
diff --git a/test-utils/src/dev/mod.rs b/test-utils/src/dev/mod.rs
index 5a37ac2549e..ec6d9a23a9d 100644
--- a/test-utils/src/dev/mod.rs
+++ b/test-utils/src/dev/mod.rs
@@ -62,9 +62,10 @@ pub enum StorageSource {
 pub async fn test_setup_database(
     log: &Logger,
     source: StorageSource,
+    listen_port: Option<u16>,
 ) -> db::CockroachInstance {
     usdt::register_probes().expect("Failed to register USDT DTrace probes");
-    setup_database(log, source).await.unwrap()
+    setup_database(log, source, listen_port).await.unwrap()
 }
 
 // TODO: switch to anyhow entirely -- this function is currently a mishmash of
@@ -72,8 +73,10 @@ pub async fn test_setup_database(
 async fn setup_database(
     log: &Logger,
     storage_source: StorageSource,
+    listen_port: Option<u16>,
 ) -> Result<db::CockroachInstance> {
     let builder = db::CockroachStarterBuilder::new();
+    let builder = builder.listen_port(listen_port.unwrap_or(0));
     let builder = match &storage_source {
         StorageSource::DoNotPopulate | StorageSource::CopyFromSeed { .. } => {
             builder
diff --git a/test-utils/src/dev/seed.rs b/test-utils/src/dev/seed.rs
index 5d5ea5beb44..6eca6daa8b3 100644
--- a/test-utils/src/dev/seed.rs
+++ b/test-utils/src/dev/seed.rs
@@ -173,6 +173,7 @@ pub async fn test_setup_database_seed(
         super::StorageSource::PopulateLatest {
             output_dir: tmp_seed_dir.path().to_owned(),
         },
+        None,
     )
     .await
     .context("failed to setup database")?;