Here is a great website for reviewing ports and what they do. It's based off
of IANA but also includes what ports known malware uses.
http://www.bekkoame.ne.jp/~s_ita/port/port1-99.html
Check it out.
Sol.
Quoting Lars Troen <Lars.Troen@sit.no>:
DF,
Port 264 is used for vpn clients (securemote/secureclient) for topology
download.
Port 1720 is not open by default. Keep in mind that tcp 1720 is also
used for pptp connections. There could be a pptp server behind this
port. Pptp also uses GRE (IP protocol 47).
Or maybe they are using internet based IP phones? There used to be a CP
vulnerability on this port:
http://www.checkpoint.com/techsupport/downloads/docs/firewall1/r55/h323u
pdate.pdf
On port 264 the firewall offers a service to the clients. This service
is however authenticated and you can't get anything from this service
without authenticating first. Old versions of fw-1 accepted
unauthenticated connections on this port. However, Checkpoint FW-1 can
use other ports now for VPN clients. For example if you're using
"visitor mode" the only port that will be open for vpn connections will
be 443 (https). Checkpoint VPNs can also use udp 2764 and udp 500, tcp
1723 (l2tp), IP protocol 94 (old version) and IP protocol 50.
Lars
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