diff --git a/0001-backport-support-lower-case-http_proxy-or-https_proxy-env-variables-in-S3-backend.patch b/0001-backport-support-lower-case-http_proxy-or-https_proxy-env-variables-in-S3-backend.patch
new file mode 100644
index 0000000000000000000000000000000000000000..614a30ed89edcb13de7e0dca526467754e622c3d
--- /dev/null
+++ b/0001-backport-support-lower-case-http_proxy-or-https_proxy-env-variables-in-S3-backend.patch
@@ -0,0 +1,60 @@
+From 547e2c2e8f2c9c5a3fe90a583876dad07f967e0c Mon Sep 17 00:00:00 2001
+From: Janos <86970079+janosdebugs@users.noreply.github.com>
+Date: Mon, 24 Jun 2024 13:24:12 +0200
+Subject: [PATCH] [Backports/1.6] Support lower-case http/https_proxy env
+ variables in S3 backend  (#1742)
+
+Signed-off-by: Janos <86970079+janosdebugs@users.noreply.github.com>
+---
+ CHANGELOG.md                                |  2 ++
+ internal/backend/remote-state/s3/backend.go | 17 ++++++++++++++---
+ 2 files changed, 16 insertions(+), 3 deletions(-)
+
+diff --git a/CHANGELOG.md b/CHANGELOG.md
+index ac11d9cea29..c260fcb4ee0 100644
+--- a/CHANGELOG.md
++++ b/CHANGELOG.md
+@@ -4,6 +4,8 @@ ENHANCEMENTS:
+ 
+ BUG FIXES:
+ 
++* Fix bug where lower-case `http_proxy`/`https_proxy` env variables were no longer supported in the S3 backend ([#1594](https://github.com/opentofu/opentofu/issues/1594))
++
+ ## 1.6.2
+ 
+ ENHANCEMENTS:
+diff --git a/internal/backend/remote-state/s3/backend.go b/internal/backend/remote-state/s3/backend.go
+index 8201baf72a7..35b5717ff23 100644
+--- a/internal/backend/remote-state/s3/backend.go
++++ b/internal/backend/remote-state/s3/backend.go
+@@ -732,9 +732,10 @@ func (b *Backend) Configure(obj cty.Value) tfdiags.Diagnostics {
+ 		// Note: we don't need to read env variables explicitly because they are read implicitly by aws-sdk-base-go:
+ 		// see: https://github.com/hashicorp/aws-sdk-go-base/blob/v2.0.0-beta.41/internal/config/config.go#L133
+ 		// which relies on: https://cs.opensource.google/go/x/net/+/refs/tags/v0.18.0:http/httpproxy/proxy.go;l=89-96
+-		HTTPProxy:            aws.String(stringAttrDefaultEnvVar(obj, "http_proxy", "HTTP_PROXY")),
+-		HTTPSProxy:           aws.String(stringAttrDefaultEnvVar(obj, "https_proxy", "HTTPS_PROXY")),
+-		NoProxy:              stringAttrDefaultEnvVar(obj, "no_proxy", "NO_PROXY"),
++		//
++		// Note: we are switching to "separate" mode here since the legacy mode is deprecated and should no longer be
++		// used.
++		HTTPProxyMode:        awsbase.HTTPProxyModeSeparate,
+ 		Insecure:             boolAttr(obj, "insecure"),
+ 		UseDualStackEndpoint: boolAttr(obj, "use_dualstack_endpoint"),
+ 		UseFIPSEndpoint:      boolAttr(obj, "use_fips_endpoint"),
+@@ -754,6 +755,16 @@ func (b *Backend) Configure(obj cty.Value) tfdiags.Diagnostics {
+ 		cfg.UseLegacyWorkflow = true
+ 	}
+ 
++	if val, ok := stringAttrOk(obj, "http_proxy"); ok {
++		cfg.HTTPProxy = &val
++	}
++	if val, ok := stringAttrOk(obj, "https_proxy"); ok {
++		cfg.HTTPSProxy = &val
++	}
++	if val, ok := stringAttrOk(obj, "no_proxy"); ok {
++		cfg.NoProxy = val
++	}
++
+ 	if val, ok := boolAttrOk(obj, "skip_metadata_api_check"); ok {
+ 		if val {
+ 			cfg.EC2MetadataServiceEnableState = imds.ClientDisabled
diff --git a/opentofu.spec b/opentofu.spec
index 3feb63c7f59a3dc54a1ccc66f759ae1dd6233d9f..22604c6fad916cbb41bb3a3741d2a42c83b4bd5c 100644
--- a/opentofu.spec
+++ b/opentofu.spec
@@ -2,12 +2,13 @@
 
 Name:           opentofu
 Version:        1.6.2
-Release:        1
+Release:        2
 Summary:        OpenTofu lets you declaratively manage your cloud infrastructure
 License:        0BSD AND Apache-2.0 AND BSD-2-Clause AND BSD-3-Clause AND MIT AND MPL-2.0
 URL:            https://github.com/opentofu/opentofu
 Source0:        https://github.com/opentofu/opentofu/archive/refs/tags/v%{version}.tar.gz
 Source1:        %{name}-%{version}-vendor.tar.gz
+Patch0001:      0001-backport-support-lower-case-http_proxy-or-https_proxy-env-variables-in-S3-backend.patch
 
 BuildRequires:  golang >= 1.20
 
@@ -43,5 +44,8 @@ done
 %{_bindir}/tofu
 
 %changelog
+* Thu Apr 10 2025 lijian <lijian2@kylinos.cn> - 1.6.2-2
+- Backport: support lower-case http/https_proxy env variables in S3 backend
+
 * Tue Mar 05 2024 lijian <lijian2@kylinos.cn> - 1.6.2-1
 - Initial package