From c7f0a32135acbdae02d2c1b1f87d92bfaffa97e0 Mon Sep 17 00:00:00 2001
From: TwiN <chris@twin.sh>
Date: Tue, 30 Sep 2025 14:27:38 -0400
Subject: [PATCH] fix(tunneling): Adjust exponential backoff duration

---
 README.md                               | 3 +++
 config/tunneling/sshtunnel/sshtunnel.go | 4 ++--
 config/tunneling/tunneling.go           | 2 +-
 config/tunneling/tunneling_test.go      | 2 +-
 4 files changed, 7 insertions(+), 4 deletions(-)

diff --git a/README.md b/README.md
index 54a3e2a6..d584dd92 100644
--- a/README.md
+++ b/README.md
@@ -745,6 +745,9 @@ endpoints:
       - "[STATUS] == 200"
 ```
 
+> ⚠️ **WARNING**:: Tunneling may introduce additional latency, especially if the connection to the tunnel is retried frequently. 
+> This may lead to inaccurate response time measurements.
+
 
 ### Alerting
 Gatus supports multiple alerting providers, such as Slack and PagerDuty, and supports different alerts for each
diff --git a/config/tunneling/sshtunnel/sshtunnel.go b/config/tunneling/sshtunnel/sshtunnel.go
index e0f0d258..964d5089 100644
--- a/config/tunneling/sshtunnel/sshtunnel.go
+++ b/config/tunneling/sshtunnel/sshtunnel.go
@@ -131,11 +131,11 @@ func (t *SSHTunnel) Dial(network, addr string) (net.Conn, error) {
 	}
 	// Attempt dial with exponential backoff retry
 	const maxRetries = 3
-	const baseDelay = time.Second
+	const baseDelay = 500 * time.Millisecond
 	var lastErr error
 	for attempt := 0; attempt < maxRetries; attempt++ {
 		if attempt > 0 {
-			// Exponential backoff: 1s, 2s, 4s
+			// Exponential backoff: 500ms, 1s, 2s
 			delay := baseDelay << (attempt - 1)
 			time.Sleep(delay)
 			// Close stale connection and reconnect
diff --git a/config/tunneling/tunneling.go b/config/tunneling/tunneling.go
index f11676fc..c4f46d23 100644
--- a/config/tunneling/tunneling.go
+++ b/config/tunneling/tunneling.go
@@ -13,7 +13,7 @@ type Config struct {
 	// Tunnels is a map of SSH tunnel configurations in which the key is the name of the tunnel
 	Tunnels map[string]*sshtunnel.Config `yaml:",inline"`
 
-	mu          sync.RWMutex                  `yaml:"-"`
+	mu          sync.RWMutex                    `yaml:"-"`
 	connections map[string]*sshtunnel.SSHTunnel `yaml:"-"`
 }
 
diff --git a/config/tunneling/tunneling_test.go b/config/tunneling/tunneling_test.go
index f80c7851..c28be5eb 100644
--- a/config/tunneling/tunneling_test.go
+++ b/config/tunneling/tunneling_test.go
@@ -188,4 +188,4 @@ func TestConfig_Close(t *testing.T) {
 	if len(config.connections) != 0 {
 		t.Errorf("Close() did not clear connections map, got %d connections", len(config.connections))
 	}
-}
\ No newline at end of file
+}