- Patch VPN gateways quickly: they are a top initial access target.
- Use certificates or MFA rather than shared secrets.
- Investigate unexpected tunnels and proxies: they are also attacker tools.
Port 3265: Altav Tunnel
Port 3265 is assigned by IANA to altav-tunnel (Altav Tunnel).
3265
How altav-tunnel works
VPN, tunnels & proxiesTraffic is wrapped in a tunnel between the two ends, so the network in between only sees the tunnel.
- Transport
- TCP · UDP
- Exposure risk
- not rated depends on the program listening
- Encryption
- Unknownnot stated by the registry
- IANA status
- Assigned1 registered service
- Range
- Registered (1024-49151)
- Category
- VPN, tunnels & proxies
Is port 3265 dangerous?
We have no specific security note for port 3265. Its risk depends on the program actually listening on it. General advice for vpn, tunnels & proxies services:
IANA registry entries for port 3265
| Service | Port | Transport | Description | Reference | Updated |
|---|---|---|---|---|---|
| altav-tunnel | 3265 | TCP, UDP | Altav Tunnel | - | - |
// source: IANA service name and port number registry
Which program uses port 3265, and is it reachable?
Linux
sudo ss -ltnup 'sport = :3265' # process listening on 3265
sudo lsof -nP -i :3265macOS
sudo lsof -nP -i :3265
Windows (PowerShell)
Get-NetTCPConnection -LocalPort 3265 -State Listen | Select LocalAddress, OwningProcess Get-NetUDPEndpoint -LocalPort 3265 netstat -ano | findstr :3265
From another machine
nmap -p 3265 -sV <host> sudo nmap -sU -p 3265 <host> nc -zv <host> 3265
Block it in the firewall
sudo ufw deny 3265/tcp # Linux (ufw) New-NetFirewallRule -DisplayName "Block 3265" -Direction Inbound -LocalPort 3265 -Protocol TCP -Action Block # Windows
What is port 3265 used for?
Port 3265 is assigned by IANA to altav-tunnel (Altav Tunnel).
Is port 3265 TCP or UDP?
Port 3265 is registered for TCP and UDP.
Is it safe to open port 3265?
It depends on the program that listens on it. Open it only for a service you know and only to the networks that need it. Patch VPN gateways quickly: they are a top initial access target.
How do I check if port 3265 is open?
On Linux run "ss -ltnup 'sport = :3265'", on macOS "lsof -nP -i :3265", and on Windows "netstat -ano | findstr :3265" to see the local process. From another machine, "nmap -p 3265 <host>" shows whether it is reachable.