Thread: Things to know about opening your server to the world

hello all,
opened server internet ssh ports open (in modem , router), , set various other tasks (quake 3 server, e-mail probably). far no problems, couple of questions:

know default, os , many network devices use dhcp ip address handling. however, seems every time turn on computers, have same ip address every time. don't know how set static address in linux (yet), nor have done linksys wrt54g2 router. so, odds of router handing machines same ip address over, , on months, year on end?

also, there security concerns should know about? know potential getting network there, wonder if take few minutes, or hours of dedicated attack.

in advance replies.

-rhemat

there's pretty big chance of same ip addresses being used on , over. imagine dhcp servers, dish out first free ip address in range they're instructed use. example:

dhcp server dishes out ip addresses in range of 192.168.1.150 - 192.168.1.200

turn on computer, , 192.168.1.150.
turn on laptop, , 192.168.1.151.

if turn off both machines , wait little, turn on laptop...it have 192.168.1.150. doubt devices on network have ever received ip address high 192.168.1.195 or close. have 3 computers @ home.

there's no reason dhcp server randomly dish out ip addresses in range. doesn't increasing security.

in fact, if hosting server public internet, don't want ip address changing or else people won't able contact you! pretty every server in world sits there @ same ip address year after year. security in strong passwords, keys, limiting open ports, keeping software date, blocking ip addresses, etc.

mentioned ssh. seems once week see thread in here got broken via ssh because used weak password , dictionary attack broke it. careful , luck!

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