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At least OpenSSH sets different TOS bits (0x16 for interactive sessions, 0x08 for bulk transfers), as discussed on quora. This can be easily exploited using rules that match those bits. It seems the highest matching QoS takes effect, make sure not to have a general rule for port 22/SSH around: OpenWRT by default ships a rule matching SSH and DNS together. ...


As well as the answer you got in the question comments, when things get too complex you can simply run bash and get it to execute the commands you provide on standard input: ssh user@B ssh user@C bash <<\! echo "line of text" >> ~/.profile !


Goal: ssh raspi should work inside the LAN and on the public Internet. To do this you need to make sure that the name resolves to the internal IP on the LAN, and the public IP from outside. First, you should obtain a domain name such as raspi.yourdomain.com. Check out http://freedns.afraid.org/ for free domains for hobby use. Point the domain at your ...


Please check the rules defined in /etc/hosts.allow and /etc/hosts.deny files. There may be some rules defined over there to allow/block connections from system. It may happen that your IP address is changing after rebooting system and sometimes IP which is denied on server is getting assigned to system.

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