F-Secure Internet Gatekeeper for Linux/Administrator’s Guide
139
Transparent mode (Router or Bridge)
Client
Internet Gatekeeper (fsigk,0.0.0.1)
POP server (popserver, 0.0.0.2)
TCP connect(to:
0.0.0.2:110)
----------------------------->
TCP connect(to:
0.0.0.2:110)
----------------------------->
+OK ... popserver
+OK ... popserver
<-----------------------------
<-----------------------------
USER user
----------------------------->
USER user
----------------------------->
+OK
+OK ...
<-----------------------------
<-----------------------------
PASS password
----------------------------->
PASS password
----------------------------->
+OK
+OK
<-----------------------------
<-----------------------------
(the rest is processed in the same way as in proxy mode)