AFM context self-ip

In regards icmp there is the following in the AFM Implementations guide: Configuring BIG-IP Network Firewall Policies

Important: ICMP is handled by BIG-IP at the global or route domain level. Because of this, ICMP messages receive a response before they reach the virtual server context. You cannot create an inline rule for ICMP or ICMPv6 on a Self IP context. You can apply a rule list to a Self IP that includes a rule for ICMP or ICMPv6; however, such a rule will be ignored. To apply firewall actions to the ICMP protocol, create a rule with the global or route domain context. ICMP rules are evaluated only for ICMP forwarding requests, and not for the IP addresses of the BIG-IP itself.

Not sure about Telnet but it may be the same issue. Try adding a rule at the global context. If not then you may want to enable logging to give you visibility on what's happening.

Hope this helps,

N