diff --git a/Dockerfile.tinc b/Dockerfile.tinc
index 1d01d14..fbb35e8 100644
--- a/Dockerfile.tinc
+++ b/Dockerfile.tinc
@@ -1,9 +1,13 @@
 FROM alpine:3.17
 MAINTAINER Team Lixo <lixonet@team.lixo>
 
-RUN apk add tinc iptables
+RUN apk add tinc iptables tcpdump
+RUN sed -i '/^default = default_sect/a legacy = legacy_sect' /etc/ssl/openssl.cnf
+RUN sed -i '/^\[default_sect\]/a activate = 1' /etc/ssl/openssl.cnf
+RUN echo "[legacy_sect]" >> /etc/ssl/openssl.cnf
+RUN echo "activate = 1" >> /etc/ssl/openssl.cnf
 
-EXPOSE 9993/tcp 655/udp
+EXPOSE 655/tcp 655/udp
 VOLUME /etc/tinc
 
 CMD [ "sh", "-c", "/usr/sbin/tincd --net=$NETNAME --no-detach" ]