If your firewall doesn't let SSH go through, step1) different port like 81, step2) udp tunnel like openvpn (pick your port, SIP sometimes work), step3) tcp insi

If your firewall doesn't let SSH go through, step1) different port like 81, step2) udp tunnel like openvpn (pick your port, SIP sometimes work), step3) tcp inside ssl tunnel on port 443, step4) http tunnel on port 80, step5) dns on port 53 Don't go to step5 if anything else work because yes, it's slow. I don't use ICMP but some people do.