diff --git a/exp.py b/exp.py
index a14d246..82e1b44 100644
--- a/exp.py
+++ b/exp.py
@@ -305,6 +305,9 @@ CONFIGS = {
 		"idle": "idle - - - - - - - - - 600.000194311142 0.0 1822 6541 1.3880000000000052 304283035 -",#TODO
 		"notify_listen": ("0.0.0.0", 8090),
 		"notify_addr": "TODO:8090",
+		"ld_preload": {
+			"openssl": "LD_PRELOAD=/home/pengelib/openssl-openssl-3.6.1/libssl.so.3:/home/pengelib/openssl-openssl-3.6.1/libcrypto.so.3",
+		}
 	},
 }
 
@@ -631,11 +634,13 @@ def make_everything(exp_dir, domains, make_ca):
 		os.makedirs(algdir, exist_ok=True)
 		make_certs(algdir, domains, alg, make_ca)
 
-def run_netreplay_server(ssh, exp_dir, repo_dir, record, listen_addr, listen_port, tls, impl, certs_dir, only_record=None, ciphers=None, kexes=None, debug=False):
+def run_netreplay_server(ssh, exp_dir, repo_dir, record, listen_addr, listen_port, tls, impl, certs_dir, only_record=None, ciphers=None, kexes=None, debug=False, ld_preload=None):
 	if exp_dir[-1] != "/":
 		exp_dir += "/"
 	repo_dir = repo_dir.removesuffix("/")
 	env = {"RUST_LOG": "warning", "SSLKEYLOGFILE": "/dev/shm/netreplay.keys.txt"}
+	if ld_preload and impl in ld_preload:
+		env["LD_PRELOAD"] = ld_preload[impl]
 	if ciphers:
 		env["CIPHERS"] = ciphers
 	if kexes:
@@ -654,6 +659,8 @@ def run_netreplay_client(ssh, exp_dir, repo_dir, record, remote_addr, remote_por
 		exp_dir += "/"
 	repo_dir = repo_dir.removesuffix("/")
 	env = {"RUST_LOG": "warning", "SSLKEYLOGFILE": "/dev/shm/netreplay.keys.txt", "EARLYDATA": earlydata}
+	if ld_preload and impl in ld_preload:
+		env["LD_PRELOAD"] = ld_preload[impl]
 	if ciphers:
 		env["CIPHERS"] = ciphers
 	if kexes:
@@ -863,6 +870,7 @@ def run_exp(config, only_record=None, idle=False, shutdown=False, debug=False):
 												ciphers=cipher,
 												kexes=kex,
 												debug=debug,
+												ld_preload=config["ld_preload"] if "ld_preload" in config else None,
 											)
 											netreplay = run_netreplay_client(
 												ssh,
@@ -880,6 +888,7 @@ def run_exp(config, only_record=None, idle=False, shutdown=False, debug=False):
 												earlydata=earlydata,
 												debug=debug,
 												notify_addr=config["notify_addr"],
+												ld_preload=config["ld_preload"] if "ld_preload" in config else None,
 											)
 										else:
 											netreplay = run_netreplay_server(
@@ -896,6 +905,7 @@ def run_exp(config, only_record=None, idle=False, shutdown=False, debug=False):
 												ciphers=cipher,
 												kexes=kex,
 												debug=debug,
+												ld_preload=config["ld_preload"] if "ld_preload" in config else None,
 											)
 											netreplay = run_netreplay_client(
 												None,
@@ -913,6 +923,7 @@ def run_exp(config, only_record=None, idle=False, shutdown=False, debug=False):
 												earlydata=earlydata,
 												debug=debug,
 												notify_addr=config["notify_addr"],
+												ld_preload=config["ld_preload"] if "ld_preload" in config else None,
 											)
 
 										prof_filename = "-"