kernel panic and postfix problems

[Jorn Argelo]

Anthony Philipp wrote:

>hello,
>i am running a personal server and after nearly 26 days of uptime without any major problems last night at around ten pm. central time there was what i assume is a kernel panic. im running 5.2 RELEASE on a pentium 3 877 mhz. 
>heres the output: (hopefully this is accurate i had to write this out by hand, if someone knows how to get the orignal output that would be nice)
>
>Fatal trap 12: page fault while in kernel mode
>cpuid =0; apic id = 00
>fault virtual address = 0x38
>fault code = supervisor read, page not present
>instruction pointer	= 0x8:0xc06bc08a
>stack pointer		= 0x10:0xcb57098c
>frame pointer		= 0x10:0xcb570a68
>code segment		= base 0x0, limit 0xfffff, type 0x1b
>			= DPL 0, pres1, dres321, gran1
>processor eflags	= interrupt enabled, resume, 10pl=0
>current process		= 27 (swi1:net)
>trap number		= 12
>panic page fault
>cpuid=0;
>
>syncing disks, buffers remaining... 1787 1787
>
>and then it was crashed hard. i couldnt switch virtual terminals, i couldnt shut down, all i could do is press the power button. so thats my first problem, what happened? was it a kernel panic? or was it something different, and whatever it was, what caused it? 
>  
>
Yup, it was a kernel panic. Some process caused your panic, which is in 
this case swi1:net. Any idea what it is?

>
>ok now onto the next problem. i was running my own mail server until recently as well, but i was getting beaten into the ground by spam. my /var/spool/postfix directory was 1.8 gigabytes. it was all spam i was bouncing from dynamic ips. none of it was getting to my accounts, but my server was getting clogged, since im running this off of adsl. im just wondering what i can do to stop this. the legitimate mail was not a problem at all. also this only started being a problem after a few weeks. as a temporary solution ive stopped postfix and deleted my entire spooled mail directory. however i would like a more permenant solution to these spammers attacking my server. right now postfix is bouncing all emails where the ips dont match the domain name. 
>  
>
Consider installing spamassassin?

Cheers,

Jorn