checker: lower minimum check interval to 5 minutes

Port 22 is now the default when no ports are configured, rather than
being unconditionally appended. Users can now probe non-standard ports
without also probing port 22.

checker/report.go

@@ -89,19 +89,19 @@ type reportSSHFPRecord struct {
 }
 
 type reportEndpoint struct {
-	Address      string
-	Host         string
-	Port         uint16
-	IsIPv6       bool
-	DialFailed bool
-	Banner       string
-	SoftwareVer  string
-	Vendor       string
-	ElapsedMS    int64
-	Error        string
-	StatusLabel  string
-	StatusClass  string
-	AnyFail      bool
+	Address     string
+	Host        string
+	Port        uint16
+	IsIPv6      bool
+	DialFailed  bool
+	Banner      string
+	SoftwareVer string
+	Vendor      string
+	ElapsedMS   int64
+	Error       string
+	StatusLabel string
+	StatusClass string
+	AnyFail     bool
 
 	HostKeys    []reportHostKey
 	AlgoTables  []reportAlgoTable
@@ -265,16 +265,16 @@ func buildReportData(d *SSHData, states []sdk.CheckState) reportView {
 
 	for _, ep := range d.Endpoints {
 		re := reportEndpoint{
-			Address:      ep.Addr(),
-			Host:         ep.Host,
-			Port:         ep.Port,
-			IsIPv6:       ep.IP != nil && ep.IP.To4() == nil,
-			DialFailed: ep.Stage == "dial",
-			Banner:       ep.Banner,
-			SoftwareVer:  ep.SoftVer,
-			Vendor:       ep.Vendor,
-			ElapsedMS:    ep.ElapsedMS,
-			Error:        ep.Error,
+			Address:     ep.Addr(),
+			Host:        ep.Host,
+			Port:        ep.Port,
+			IsIPv6:      ep.IP != nil && ep.IP.To4() == nil,
+			DialFailed:  ep.Stage == "dial",
+			Banner:      ep.Banner,
+			SoftwareVer: ep.SoftVer,
+			Vendor:      ep.Vendor,
+			ElapsedMS:   ep.ElapsedMS,
+			Error:       ep.Error,
 		}
 		if ep.IP != nil && ep.IP.To4() == nil {
 			v.AnyIPv6 = true

checker/types.go

@@ -133,8 +133,8 @@ func (p SSHProbe) Addr() string {
 
 // HostKeyInfo captures an observed host key in its SSH wire format.
 type HostKeyInfo struct {
-	Type   string `json:"type"`            // e.g. "ssh-ed25519"
-	RawKey []byte `json:"key"`             // SSH wire format (ssh.PublicKey.Marshal())
+	Type   string `json:"type"` // e.g. "ssh-ed25519"
+	RawKey []byte `json:"key"`  // SSH wire format (ssh.PublicKey.Marshal())
 }
 
 // Issue is a single SSH finding surfaced to consumers.