Firewall Problems

[Bob H. Tikos]

George Daflidis-Kotsis wrote:
> 
> On Tue, Sep 21, 1999 at 08:39:14AM +0300, Kekes Stamatis wrote:
> 
> >  Δίκιο έχεις μεγάλε όμως δεν είμαι και κάνα 23 χρονο που μόλις τελείωσε όσο για το
> > συγκεκριμένο firewall είναι απο γεννέσεως κόσμου προβληματικό γιατί τα αρχεία του τα
> > έχει σε MS Access database αυτό είναι που δημιουργέι τα προβλήματα. Μου έχει "σκάσει"
> > αυτή η database πάνω από 10 φορές μέχρι τώρα.
> 
> Sorry, paranohses, n' mallon egw den dieukrinisa. Den phgaine se sena to
> 23xronos k.l.p, genikh perigrafh ths sumperiforas dieu8untwn mikromesaiwn ews
> kai megalwn epixeirhsewn htan.
> 
Loipon paides,

Kai h dikh mou gnwmh epi tou thematos:
Den mporei to paidi efoson exei parei th douleia na ta mountzwsei ola
kai na shkwthei na fygei. Oson afora to "logodotima" to katalavenw
apolyta.
kai gw ta idia perasa "in my early days". Alla, (Stamath) an xreiazesai
oiadhpote tools gia na kaneis th douleia sou swsta, den nomizw na sou
arnithoun parwxes (tools, resources....) ektos kai an xreiazwntai na
ksodeutoun.
Pou poly phthanon den tha to kanoun. PX, an tous peis oti tha
prothmouses 
na engatasthseis CheckPoint Firewall-1 anti giauto pou exeis kai to
opoio timatai 
dollarios $1,500 kai vale, kai to opoio eksartatai apo to posa
mhxanimata exeis
sto diktio sou , xrhstes, applications, skylia, gatia, krokodhlous,
fidia, stridia,
kalamaria....... 

An omws apo thn alh pleura tous peis (mono gia to <<logodotima>> ) oti
exeis
tropo na kaneis monitor to network, traffic, DNS, DHCP, (samba, kai ena
karo apo ala Capabilities pou sou parexei to Linux) kai to mono pou
xreiazesai
einai ena h dyo "low end" pentioum mhxanhmata, h akonh kai (se teleiws
akraia periptwsh ) kana dyo 486, me ligo akoma xrono (h kai oxi) ,
XWRIS na KSODEUTEI H ETEREIA PARAPANW APO OTI XREIAZETAI !!!!!!! (to
aiwnio megalo
epixhrhma!!!!!!!), den nomizw na sou arnhthoun.

Telika an, mporeseis kai katafereis ena Linux Firewall implementation me
ipchains
(kapou , opoudhpote akoma kai sto spiti) enas kalos tropos na katalabeis
firewall
rules einai 
 % ipchains -L > /tmp/ipchains-L
ektypwse to fakelo -----^ kai diabase ta rules. Pare to printout kai
pane sto
NT. Prospathise na valeis ta rules me ton idio tropo.
Panta se ola ta Firewall implementations asxetws an einai $$$$$ h tsampa
exeis:

target     -- Accept,Deny,Reject
prot(ocol) -- tcp,udp
opt        -- firewall specific options
source     -- source IP ( apo pou )
destination-- destin. IP ( ws pou )
ports      -- kai port numbers (ftp://ftp.uu.net/inet/rfc/rfc1700.Z)


Mpampis.
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