Fire walls between servers..

Hi All,
1. Is there any way to find firewalls (i.e. number of firewalls and their name or any other identification) between two servers.
2. How to find ports whether the are opened in the fire wall. Telnet is disabled for our servers. Is there any way to find this.
Thanks in advance,
DJ.

telnet: connect to address 10.4.149.241: Connection refused
Can I conclude the port is not opened from the above result ?Possible conclusions:
1. There is no service running on pser2j.bts.org at 55000 port number
2. FW1 returns connection refused (blocking connection)
2. FW2 returns connection refused (blocking connection)
Is there any way to find which firewall is creating the problem?Of course there is.
1. Clean, quick and best: ask the FW administrator whether connection is allowed (also FW administrator could check FW logs for all information about connection)
2. Only for users with good understanding of TCP/IP: you could compare TTL of SYN packet with TTL of RST packet (firewall decrements TTL)
Note this method is not alwas usefull and in such case you need use other methods.

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