diff --git a/README.md b/README.md
index 7b2619c47..c2d3f544e 100755
--- a/README.md
+++ b/README.md
@@ -188,6 +188,11 @@ Other documents:
 <a name="history"></a>
 <a name="change-logs"></a>
 
+## V5 changes
+
+* v5.0, 2021-03-17, Live: Refine edge to follow client and HTTP/302. 5.0.1
+* v5.0, 2021-03-15, Init SRS/5. 5.0.0
+
 ## V4 changes
 
 * v4.0, 2021-03-09, DTLS: Fix ARQ bug, use openssl timeout. 4.0.84
diff --git a/trunk/conf/full.conf b/trunk/conf/full.conf
index e1b64f10d..70d199e4a 100644
--- a/trunk/conf/full.conf
+++ b/trunk/conf/full.conf
@@ -708,6 +708,11 @@ vhost cluster.srs.com {
         #       flvs, Connect origin by HTTPS-FLV
         # Default: rtmp
         protocol rtmp;
+
+        # Whether follow client protocol to connect to origin.
+        # @remark The FLV might use different signature(in query string) to RTMP.
+        # Default: off
+        follow_client off;
     }
 }
 
diff --git a/trunk/configure b/trunk/configure
index 70a8319f9..9fba358e6 100755
--- a/trunk/configure
+++ b/trunk/configure
@@ -204,7 +204,7 @@ fi
 MODULE_ID="CORE"
 MODULE_DEPENDS=()
 ModuleLibIncs=(${SRS_OBJS_DIR})
-MODULE_FILES=("srs_core" "srs_core_version4" "srs_core_autofree" "srs_core_performance"
+MODULE_FILES=("srs_core" "srs_core_version5" "srs_core_autofree" "srs_core_performance"
 		"srs_core_time")
 CORE_INCS="src/core"; MODULE_DIR=${CORE_INCS} . auto/modules.sh
 CORE_OBJS="${MODULE_OBJS[@]}"
diff --git a/trunk/src/app/srs_app_config.cpp b/trunk/src/app/srs_app_config.cpp
index 7e538389b..cbf710c7a 100644
--- a/trunk/src/app/srs_app_config.cpp
+++ b/trunk/src/app/srs_app_config.cpp
@@ -3829,7 +3829,7 @@ srs_error_t SrsConfig::check_normal_config()
                 for (int j = 0; j < (int)conf->directives.size(); j++) {
                     string m = conf->at(j)->name;
                     if (m != "mode" && m != "origin" && m != "token_traverse" && m != "vhost" && m != "debug_srs_upnode" && m != "coworkers"
-                        && m != "origin_cluster" && m != "protocol") {
+                        && m != "origin_cluster" && m != "protocol" && m != "follow_client") {
                         return srs_error_new(ERROR_SYSTEM_CONFIG_INVALID, "illegal vhost.cluster.%s of %s", m.c_str(), vhost->arg0().c_str());
                     }
                 }
@@ -6218,6 +6218,28 @@ string SrsConfig::get_vhost_edge_protocol(string vhost)
     return conf->arg0();
 }
 
+bool SrsConfig::get_vhost_edge_follow_client(string vhost)
+{
+    static bool DEFAULT = false;
+
+    SrsConfDirective* conf = get_vhost(vhost);
+    if (!conf) {
+        return DEFAULT;
+    }
+
+    conf = conf->get("cluster");
+    if (!conf) {
+        return DEFAULT;
+    }
+
+    conf = conf->get("follow_client");
+    if (!conf) {
+        return DEFAULT;
+    }
+
+    return SRS_CONF_PERFER_FALSE(conf->arg0());
+}
+
 bool SrsConfig::get_vhost_edge_token_traverse(string vhost)
 {
     static bool DEFAULT = false;
diff --git a/trunk/src/app/srs_app_config.hpp b/trunk/src/app/srs_app_config.hpp
index 0ace96eb6..f880da403 100644
--- a/trunk/src/app/srs_app_config.hpp
+++ b/trunk/src/app/srs_app_config.hpp
@@ -775,6 +775,8 @@ public:
     virtual SrsConfDirective* get_vhost_edge_origin(std::string vhost);
     // Get the procotol to connect to origin server.
     virtual std::string get_vhost_edge_protocol(std::string vhost);
+    // Whether follow client protocol to connect to origin.
+    virtual bool get_vhost_edge_follow_client(std::string vhost);
     // Whether edge token tranverse is enabled,
     // If  true, edge will send connect origin to verfy the token of client.
     // For example, we verify all clients on the origin FMS by server-side as,
diff --git a/trunk/src/app/srs_app_edge.cpp b/trunk/src/app/srs_app_edge.cpp
index 64fbe61fa..9cdbaf5c4 100644
--- a/trunk/src/app/srs_app_edge.cpp
+++ b/trunk/src/app/srs_app_edge.cpp
@@ -183,6 +183,7 @@ SrsEdgeFlvUpstream::SrsEdgeFlvUpstream(std::string schema)
     hr_ = NULL;
     reader_ = NULL;
     decoder_ = NULL;
+    req_ = NULL;
 }
 
 SrsEdgeFlvUpstream::~SrsEdgeFlvUpstream()
@@ -191,12 +192,24 @@ SrsEdgeFlvUpstream::~SrsEdgeFlvUpstream()
 }
 
 srs_error_t SrsEdgeFlvUpstream::connect(SrsRequest* r, SrsLbRoundRobin* lb)
+{
+    // Because we might modify the r, which cause retry fail, so we must copy it.
+    SrsRequest* cp = r->copy();
+
+    // Free the request when close upstream.
+    srs_freep(req_);
+    req_ = cp;
+
+    return do_connect(cp, lb, 0);
+}
+
+srs_error_t SrsEdgeFlvUpstream::do_connect(SrsRequest* r, SrsLbRoundRobin* lb, int redirect_depth)
 {
     srs_error_t err = srs_success;
 
     SrsRequest* req = r;
 
-    if (true) {
+    if (redirect_depth == 0) {
         SrsConfDirective* conf = _srs_config->get_vhost_edge_origin(req->vhost);
 
         // @see https://github.com/ossrs/srs/issues/79
@@ -217,12 +230,20 @@ srs_error_t SrsEdgeFlvUpstream::connect(SrsRequest* r, SrsLbRoundRobin* lb)
         // Remember the current selected server.
         selected_ip = server;
         selected_port = port;
+    } else {
+        // If HTTP redirect, use the server in location.
+        schema_ = req->schema;
+        selected_ip = req->host;
+        selected_port = req->port;
     }
 
     srs_freep(sdk_);
     sdk_ = new SrsHttpClient();
 
-    string path = "/" + req->app + "/" + req->stream + ".flv";
+    string path = "/" + req->app + "/" + req->stream;
+    if (!srs_string_ends_with(req->stream, ".flv")) {
+        path += ".flv";
+    }
     if (!req->param.empty()) {
         path += req->param;
     }
@@ -240,6 +261,37 @@ srs_error_t SrsEdgeFlvUpstream::connect(SrsRequest* r, SrsLbRoundRobin* lb)
         return srs_error_wrap(err, "edge get %s failed, path=%s", url.c_str(), path.c_str());
     }
 
+    if (hr_->status_code() == 404) {
+        return srs_error_new(ERROR_RTMP_STREAM_NOT_FOUND, "Connect to %s, status=%d", url.c_str(), hr_->status_code());
+    }
+
+    string location;
+    if (hr_->status_code() == 302) {
+        location = hr_->header()->get("Location");
+    }
+    srs_trace("Edge: Connect to %s ok, status=%d, location=%s", url.c_str(), hr_->status_code(), location.c_str());
+
+    if (hr_->status_code() == 302) {
+        if (redirect_depth >= 3) {
+            return srs_error_new(ERROR_HTTP_302_INVALID, "redirect to %s fail, depth=%d", location.c_str(), redirect_depth);
+        }
+
+        string app;
+        string stream_name;
+        if (true) {
+            string tcUrl;
+            srs_parse_rtmp_url(location, tcUrl, stream_name);
+
+            int port;
+            string schema, host, vhost, param;
+            srs_discovery_tc_url(tcUrl, schema, host, vhost, app, stream_name, port, param);
+
+            r->schema = schema; r->host = host; r->port = port;
+            r->app = app; r->stream = stream_name; r->param = param;
+        }
+        return do_connect(r, lb, redirect_depth + 1);
+    }
+
     srs_freep(reader_);
     reader_ = new SrsHttpFileReader(hr_->body_reader());
 
@@ -330,6 +382,7 @@ void SrsEdgeFlvUpstream::close()
     srs_freep(hr_);
     srs_freep(reader_);
     srs_freep(decoder_);
+    srs_freep(req_);
 }
 
 void SrsEdgeFlvUpstream::selected(string& server, int& port)
@@ -446,8 +499,17 @@ srs_error_t SrsEdgeIngester::do_cycle()
             return srs_error_wrap(err, "do cycle pull");
         }
 
-        srs_freep(upstream);
+        // Use protocol in config.
         string edge_protocol = _srs_config->get_vhost_edge_protocol(req->vhost);
+
+        // If follow client protocol, change to protocol of client.
+        bool follow_client = _srs_config->get_vhost_edge_follow_client(req->vhost);
+        if (follow_client && !req->protocol.empty()) {
+            edge_protocol = req->protocol;
+        }
+
+        // Create object by protocol.
+        srs_freep(upstream);
         if (edge_protocol == "flv" || edge_protocol == "flvs") {
             upstream = new SrsEdgeFlvUpstream(edge_protocol == "flv"? "http" : "https");
         } else {
diff --git a/trunk/src/app/srs_app_edge.hpp b/trunk/src/app/srs_app_edge.hpp
index 80d9a1b31..6c50814d2 100644
--- a/trunk/src/app/srs_app_edge.hpp
+++ b/trunk/src/app/srs_app_edge.hpp
@@ -127,6 +127,8 @@ private:
     SrsHttpFileReader* reader_;
     SrsFlvDecoder* decoder_;
 private:
+    // We might modify the request by HTTP redirect.
+    SrsRequest* req_;
     // Current selected server, the ip:port.
     std::string selected_ip;
     int selected_port;
@@ -135,6 +137,9 @@ public:
     virtual ~SrsEdgeFlvUpstream();
 public:
     virtual srs_error_t connect(SrsRequest* r, SrsLbRoundRobin* lb);
+private:
+    virtual srs_error_t do_connect(SrsRequest* r, SrsLbRoundRobin* lb, int redirect_depth);
+public:
     virtual srs_error_t recv_message(SrsCommonMessage** pmsg);
     virtual srs_error_t decode_message(SrsCommonMessage* msg, SrsPacket** ppacket);
     virtual void close();
diff --git a/trunk/src/app/srs_app_rtc_conn.cpp b/trunk/src/app/srs_app_rtc_conn.cpp
index e6afab909..65fb9b421 100644
--- a/trunk/src/app/srs_app_rtc_conn.cpp
+++ b/trunk/src/app/srs_app_rtc_conn.cpp
@@ -1327,12 +1327,7 @@ srs_error_t SrsRtcPublishStream::send_periodic_twcc()
         return srs_error_wrap(err, "encode, count=%u", twcc_fb_count_);
     }
 
-    int nb_protected_buf = buffer->pos();
-    if ((err = session_->transport_->protect_rtcp(pkt, &nb_protected_buf)) != srs_success) {
-        return srs_error_wrap(err, "protect rtcp, size=%u", nb_protected_buf);
-    }
-
-    return session_->sendonly_skt->sendto(pkt, nb_protected_buf, 0);
+    return session_->send_rtcp(pkt, buffer->pos());
 }
 
 srs_error_t SrsRtcPublishStream::on_rtcp(SrsRtcpCommon* rtcp)
@@ -2366,17 +2361,11 @@ void SrsRtcConnection::check_send_nacks(SrsRtpNackForReceiver* nack, uint32_t ss
     rtcpNack.encode(&stream);
 
     // TODO: FIXME: Check error.
-    int nb_protected_buf = stream.pos();
-    transport_->protect_rtcp(stream.data(), &nb_protected_buf);
-
-    // TODO: FIXME: Check error.
-    sendonly_skt->sendto(stream.data(), nb_protected_buf, 0);
+    send_rtcp(stream.data(), stream.pos());
 }
 
 srs_error_t SrsRtcConnection::send_rtcp_rr(uint32_t ssrc, SrsRtpRingBuffer* rtp_queue, const uint64_t& last_send_systime, const SrsNtp& last_send_ntp)
 {
-    srs_error_t err = srs_success;
-
     ++_srs_pps_srtcps->sugar;
 
     // @see https://tools.ietf.org/html/rfc3550#section-6.4.2
@@ -2412,18 +2401,11 @@ srs_error_t SrsRtcConnection::send_rtcp_rr(uint32_t ssrc, SrsRtpRingBuffer* rtp_
     srs_info("RR ssrc=%u, fraction_lost=%u, cumulative_number_of_packets_lost=%u, extended_highest_sequence=%u, interarrival_jitter=%u",
         ssrc, fraction_lost, cumulative_number_of_packets_lost, extended_highest_sequence, interarrival_jitter);
 
-    int nb_protected_buf = stream.pos();
-    if ((err = transport_->protect_rtcp(stream.data(), &nb_protected_buf)) != srs_success) {
-        return srs_error_wrap(err, "protect rtcp rr");
-    }
-
-    return sendonly_skt->sendto(stream.data(), nb_protected_buf, 0);
+    return send_rtcp(stream.data(), stream.pos());
 }
 
 srs_error_t SrsRtcConnection::send_rtcp_xr_rrtr(uint32_t ssrc)
 {
-    srs_error_t err = srs_success;
-
     ++_srs_pps_srtcps->sugar;
 
     /*
@@ -2466,18 +2448,11 @@ srs_error_t SrsRtcConnection::send_rtcp_xr_rrtr(uint32_t ssrc)
     stream.write_4bytes(cur_ntp.ntp_second_);
     stream.write_4bytes(cur_ntp.ntp_fractions_);
 
-    int nb_protected_buf = stream.pos();
-    if ((err = transport_->protect_rtcp(stream.data(), &nb_protected_buf)) != srs_success) {
-        return srs_error_wrap(err, "protect rtcp xr");
-    }
-
-    return sendonly_skt->sendto(stream.data(), nb_protected_buf, 0);
+    return send_rtcp(stream.data(), stream.pos());
 }
 
 srs_error_t SrsRtcConnection::send_rtcp_fb_pli(uint32_t ssrc, const SrsContextId& cid_of_subscriber)
 {
-    srs_error_t err = srs_success;
-
     ++_srs_pps_srtcps->sugar;
 
     char buf[kRtpPacketSize];
@@ -2498,12 +2473,7 @@ srs_error_t SrsRtcConnection::send_rtcp_fb_pli(uint32_t ssrc, const SrsContextId
         _srs_blackhole->sendto(stream.data(), stream.pos());
     }
 
-    int nb_protected_buf = stream.pos();
-    if ((err = transport_->protect_rtcp(stream.data(), &nb_protected_buf)) != srs_success) {
-        return srs_error_wrap(err, "protect rtcp psfb pli");
-    }
-
-    return sendonly_skt->sendto(stream.data(), nb_protected_buf, 0);
+    return send_rtcp(stream.data(), stream.pos());
 }
 
 void SrsRtcConnection::simulate_nack_drop(int nn)
diff --git a/trunk/src/core/srs_core.hpp b/trunk/src/core/srs_core.hpp
index 0fbe07c39..af46019db 100644
--- a/trunk/src/core/srs_core.hpp
+++ b/trunk/src/core/srs_core.hpp
@@ -25,10 +25,7 @@
 #define SRS_CORE_HPP
 
 // The version config.
-#define VERSION_MAJOR       4
-#define VERSION_MINOR       0
-#include <srs_core_version4.hpp>
-#define VERSION_REVISION    SRS_VERSION4_REVISION
+#include <srs_core_version5.hpp>
 
 // The macros generated by configure script.
 #include <srs_auto_headers.hpp>
diff --git a/trunk/src/core/srs_core_version3.hpp b/trunk/src/core/srs_core_version3.hpp
index b4c8f7273..dae57fe2f 100644
--- a/trunk/src/core/srs_core_version3.hpp
+++ b/trunk/src/core/srs_core_version3.hpp
@@ -24,6 +24,8 @@
 #ifndef SRS_CORE_VERSION3_HPP
 #define SRS_CORE_VERSION3_HPP
 
+#define VERSION_MAJOR       3
+#define VERSION_MINOR       0
 #define SRS_VERSION3_REVISION 158
 
 #endif
diff --git a/trunk/src/core/srs_core_version4.hpp b/trunk/src/core/srs_core_version4.hpp
index ddca1c39d..0e7f31831 100644
--- a/trunk/src/core/srs_core_version4.hpp
+++ b/trunk/src/core/srs_core_version4.hpp
@@ -24,6 +24,8 @@
 #ifndef SRS_CORE_VERSION4_HPP
 #define SRS_CORE_VERSION4_HPP
 
+#define VERSION_MAJOR       4
+#define VERSION_MINOR       0
 #define SRS_VERSION4_REVISION 85
 
 #endif
diff --git a/trunk/src/core/srs_core_version5.cpp b/trunk/src/core/srs_core_version5.cpp
new file mode 100644
index 000000000..e5071d6ef
--- /dev/null
+++ b/trunk/src/core/srs_core_version5.cpp
@@ -0,0 +1,24 @@
+/**
+ * The MIT License (MIT)
+ *
+ * Copyright (c) 2013-2020 Winlin
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy of
+ * this software and associated documentation files (the "Software"), to deal in
+ * the Software without restriction, including without limitation the rights to
+ * use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
+ * the Software, and to permit persons to whom the Software is furnished to do so,
+ * subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
+ * FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
+ * COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
+ * IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+
+#include <srs_core_version4.hpp>
diff --git a/trunk/src/core/srs_core_version5.hpp b/trunk/src/core/srs_core_version5.hpp
new file mode 100644
index 000000000..7c598a58e
--- /dev/null
+++ b/trunk/src/core/srs_core_version5.hpp
@@ -0,0 +1,31 @@
+/**
+ * The MIT License (MIT)
+ *
+ * Copyright (c) 2013-2020 Winlin
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy of
+ * this software and associated documentation files (the "Software"), to deal in
+ * the Software without restriction, including without limitation the rights to
+ * use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
+ * the Software, and to permit persons to whom the Software is furnished to do so,
+ * subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
+ * FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
+ * COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
+ * IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+
+#ifndef SRS_CORE_VERSION5_HPP
+#define SRS_CORE_VERSION5_HPP
+
+#define VERSION_MAJOR       5
+#define VERSION_MINOR       0
+#define VERSION_REVISION    1
+
+#endif
diff --git a/trunk/src/protocol/srs_protocol_utility.cpp b/trunk/src/protocol/srs_protocol_utility.cpp
index ece4ef0bc..6b61aceb5 100644
--- a/trunk/src/protocol/srs_protocol_utility.cpp
+++ b/trunk/src/protocol/srs_protocol_utility.cpp
@@ -106,6 +106,10 @@ void srs_discovery_tc_url(string tcUrl, string& schema, string& host, string& vh
     }
     
     port = SRS_CONSTS_RTMP_DEFAULT_PORT;
+    if (schema == "https") {
+        port = SRS_DEFAULT_HTTPS_PORT;
+    }
+
     if ((pos = host.find(":")) != std::string::npos) {
         srs_parse_hostport(host, host, port);
         srs_info("discovery host=%s, port=%d", host.c_str(), port);
diff --git a/trunk/src/protocol/srs_rtmp_stack.cpp b/trunk/src/protocol/srs_rtmp_stack.cpp
index f80cf77cd..25c0b7acc 100644
--- a/trunk/src/protocol/srs_rtmp_stack.cpp
+++ b/trunk/src/protocol/srs_rtmp_stack.cpp
@@ -1578,6 +1578,8 @@ SrsRequest::SrsRequest()
     duration = -1;
     port = SRS_CONSTS_RTMP_DEFAULT_PORT;
     args = NULL;
+
+    protocol = "rtmp";
 }
 
 SrsRequest::~SrsRequest()
@@ -1605,6 +1607,8 @@ SrsRequest* SrsRequest::copy()
     if (args) {
         cp->args = args->copy()->to_object();
     }
+
+    cp->protocol = protocol;
     
     return cp;
 }
@@ -1632,6 +1636,8 @@ void SrsRequest::update_auth(SrsRequest* req)
     if (req->args) {
         args = req->args->copy()->to_object();
     }
+
+    protocol = req->protocol;
     
     srs_info("update req of soruce for auth ok");
 }
diff --git a/trunk/src/protocol/srs_rtmp_stack.hpp b/trunk/src/protocol/srs_rtmp_stack.hpp
index 6f311383f..2f4741fe2 100644
--- a/trunk/src/protocol/srs_rtmp_stack.hpp
+++ b/trunk/src/protocol/srs_rtmp_stack.hpp
@@ -489,6 +489,12 @@ public:
 public:
     // Transform it as HTTP request.
     virtual SrsRequest* as_http();
+public:
+    // The protocol of client:
+    //      rtmp, Adobe RTMP protocol.
+    //      flv, HTTP-FLV protocol.
+    //      flvs, HTTPS-FLV protocol.
+    std::string protocol;
 };
 
 // The response to client.
diff --git a/trunk/src/protocol/srs_service_http_conn.cpp b/trunk/src/protocol/srs_service_http_conn.cpp
index d239972b2..49b3defdd 100644
--- a/trunk/src/protocol/srs_service_http_conn.cpp
+++ b/trunk/src/protocol/srs_service_http_conn.cpp
@@ -680,6 +680,9 @@ SrsRequest* SrsHttpMessage::to_request(string vhost)
     if (!oip.empty()) {
         req->ip = oip;
     }
+
+    // The request streaming protocol.
+    req->protocol = (schema_ == "http")? "flv" : "flvs";
     
     return req;
 }