I have an ipchains firewall that is setup like this:
Public Internet
|
v
DMZ --> External Interface |
v
IPchains
|
v
Internal Interface &&
Private Network
Telnet-ing from private network to server box on DMZ that are internet
reachable I notice that my connections randomly get dropped and firewall is
not logging any denials on port 23. I also notice this when trying to use
Secure Connect Manager ( I am not allowing tftp through my firewall and this
should be getting blocked and logged as the last three rules are )
#
# End of allowances.
# Now put catch-all rules here.
#
$IPCHAINS -A input -s 0.0.0.0/0 -d 0.0.0.0/0 -l -j REJECT
$IPCHAINS -A output -s 0.0.0.0/0 -d 0.0.0.0/0 -l -j REJECT
$IPCHAINS -A forward -s 0.0.0.0/0 -d 0.0.0.0/0 -l -j REJECT
I don't care about the Ascend stuff as I'm scapping it for a Cisco anyway.
I'm just wondering why telnet through firewall to my DMZ servers get
randomly dropped. All MTU's are 1500. I do notice 27% errors on netstat
for the external interface.
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