diff --git a/projects/bash_networking_security/SOLUTION b/projects/bash_networking_security/SOLUTION
index 2edfbaf..a8a167a 100644
--- a/projects/bash_networking_security/SOLUTION
+++ b/projects/bash_networking_security/SOLUTION
@@ -1,16 +1,19 @@
 Local DNS Server IP
 -------------------
-<ip-here>
+127.0.0.53
 
 
 
 Default gateway IP
 -------------------
-<ip-here>
+10.0.0.1
 
 
 
 DHCP IP allocation sys-logs
 -------------------
-<logs-here>
-
+Jun 13 09:32:16 ip-10-0-0-182 dhclient[340]: Internet Systems Consortium DHCP Client 4.4.1
+Jun 13 09:32:16 ip-10-0-0-182 dhclient[340]: For info, please visit https://www.isc.org/software/dhcp/
+Jun 13 09:32:16 ip-10-0-0-182 dhclient[340]: DHCPDISCOVER on eth0 to 255.255.255.255 port 67 interval 3 (xid=0x64655509)
+Jun 13 09:32:16 ip-10-0-0-182 dhclient[340]: DHCPOFFER of 10.0.0.182 from 10.0.0.1
+Jun 13 09:32:16 ip-10-0-0-182 dhclient[340]: DHCPREQUEST for 10.0.0.182 on eth0 to 255.255.255.255 port 67 (xid=0x9556564)
diff --git a/projects/bash_networking_security/bastion_connect.sh b/projects/bash_networking_security/bastion_connect.sh
index a9bf588..86407bd 100644
--- a/projects/bash_networking_security/bastion_connect.sh
+++ b/projects/bash_networking_security/bastion_connect.sh
@@ -1 +1,44 @@
 #!/bin/bash
+
+if [[ -z "$KEY_PATH" ]]; then
+
+  echo "KEY_PATH environment variable is not set!"
+
+  exit 5
+
+fi
+
+
+
+
+if [[ $# -lt 1 ]]; then
+
+  echo "KEY_PATH env var is expected"
+
+  echo "Please provide Public Instance (Bastion) IP address"
+
+  exit 5
+
+fi
+
+
+
+
+public_ip=$1
+
+private_ip=$2
+
+command="${@:3}"
+
+
+
+
+if [[ -n "$private_ip" ]]; then
+
+  ssh -t -i "$KEY_PATH" ubuntu@"$public_ip" ssh -i "new_key" ubuntu@"$private_ip" "$command"
+
+else
+
+  ssh -i "$KEY_PATH" ubuntu@"$public_ip" "$command"
+
+fi
diff --git a/projects/bash_networking_security/tlsHandshake.sh b/projects/bash_networking_security/tlsHandshake.sh
index a9bf588..5a9850d 100644
--- a/projects/bash_networking_security/tlsHandshake.sh
+++ b/projects/bash_networking_security/tlsHandshake.sh
@@ -1 +1,62 @@
-#!/bin/bash
+
+#!/bin/bash	#!/bin/bash -x
+
+# Step 1 - Client Hello (Client -> Server)
+RESPONSE=$(curl -X POST -H "Content-Type: application/json" -d '{
+   "version": "1.3",
+   "ciphersSuites": ["TLS_AES_128_GCM_SHA256", "TLS_CHACHA20_POLY1305_SHA256"],
+   "message": "Client Hello"
+}' http://3.80.89.74:8080/clienthello)
+
+
+# Step 2 - Server Hello (Server -> Client)
+SESSION_ID=$(echo "$RESPONSE" | jq -r '.sessionID')
+
+echo "$RESPONSE" | jq -r '.serverCert' > cert.pem
+
+
+# Step 3 - Server Certificate Verification
+wget  https://devops-feb23.s3.eu-north-1.amazonaws.com/cert-ca-aws.pem
+
+VERIFICATION=$(openssl verify -CAfile cert-ca-aws.pem cert.pem)
+
+if [ "$VERIFICATION" != "cert.pem: OK" ];
+then
+  echo "Server Certificate is invalid."
+  exit 5
+  else
+    echo "cert.pem: OK"
+fi
+
+
+# Step 4 - Client-Server master-key exchange
+#echo "Hi server, please encrypt me and send to client!" > masterKey.txt
+openssl rand -out masterKey.txt -base64 32
+
+
+
+MASTER_KEY=$(openssl smime -encrypt -aes-256-cbc -in masterKey.txt -outform DER cert.pem | base64 | tr -d '\n')
+
+
+
+# Step 5 - Server verification message
+RESPONSE=$(curl -X POST -H "Content-Type: application/json" -d '{
+  "sessionID": "'"$SESSION_ID"'",
+  "masterKey": "'"$MASTER_KEY"'",
+  "sampleMessage": "Hi server, please encrypt me and send to client!"
+}' http://3.80.89.74:8080/keyexchange)
+
+
+# Step 6 - Client verification message
+
+echo "$RESPONSE" | jq -r '.encryptedSampleMessage' > encSampleMsg.txt
+cat encSampleMsg.txt | base64 -d > encSampleMsgReady.txt
+
+decrypted_sample_msg=$(openssl enc -d -aes-256-cbc -pbkdf2 -kfile masterKey.txt -in encSampleMsgReady.txt)
+
+if [ "$decrypted_sample_msg" != "Hi server, please encrypt me and send to client!" ]; then
+  echo "Server symmetric encryption using the exchanged master-key has failed."
+  exit 6
+else
+  echo "Client-Server TLS handshake has been completed successfully"
+fi
diff --git a/projects/bash_networking_security/vpc.sh b/projects/bash_networking_security/vpc.sh
index 951abba..21897a5 100644
--- a/projects/bash_networking_security/vpc.sh
+++ b/projects/bash_networking_security/vpc.sh
@@ -1,4 +1,4 @@
-REGION=""
-VPC_ID=""
-PUBLIC_INSTANCE_ID=""
-PRIVATE_INSTANCE_ID=""
\ No newline at end of file
+REGION="us-east-1"
+VPC_ID="vpc-0fa173275baf10b87"
+PUBLIC_INSTANCE_ID="i-07a59423027bcd60d"
+PRIVATE_INSTANCE_ID="i-00ac045e505098220"