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How to mount a remote file system to another linux box
by Indunil Jayasooriya 19 Sep '07

19 Sep '07

Hi, I have applied traffic shaping on firewall running CentOS 4.5. eth1 is the device where I have done traffic shaping. I am now running some monitoring tools such as polltc and tc-graph.pl. They generate graphs. These graphs are updated every 10 seconds. They have been saved on the firewall it self. To view thsese graphs, I have to enable apache on firewall it self. But I do not need to run apache on firewall as I will have to open port 80. I only have opened port 22 to the WORLD. I want to go that way. I have a web server running CentOS 4.4 @ LAN. I can view those graphs via this web server , if I can mount those graphs to this web server. my firewall has 3 nics. eth2 is 192.168.101.254 connected to the LAN. my web server @ LAN is 192.168.101.35 How can I achieve this ? Hope to hear from you. -- Thank you Indunil Jayasooriya

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Re: [CentOS] How to mount a remote file system to another linux box (SLOVED)
by Indunil Jayasooriya 19 Sep '07

19 Sep '07

> > > [root@host ~]# mkdir /graphs > > Now, The question is how to mount it. Do i need to reboot both machines? > > Or without rebooting, How to get it worked. > > Thnaks ALL, > I got it up and running. -- Thank you Indunil Jayasooriya

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filtering ssh regardless of the port
by Bazy 19 Sep '07

19 Sep '07

-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 Hello gentlemen and lady's, I am trying to filter ssh traffic regardless of the port the connection is opened on. I want to do the same for rlogin and telnet. I know it would be easier to use a proxy server and only allow users to access the web... but it's more complicated... they also need other ports open... and they use public IP addresses. Is there any way that I can do it with iptables without having to patch the kernel and iptables with l7-filter.sourceforge.net? Thank you for your time. -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.7 (MingW32) Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org iD8DBQFG8DOe7nEMcIvWOSIRAuQNAJ9+0iQZf0GFEioN/6vRuCHxz7+6TACgharb j9rK16LXwIudeBj/oryLXNI= =650a -----END PGP SIGNATURE-----

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Postfix Questions
by John Hinton 19 Sep '07

19 Sep '07

I've been running sendmail since the beginning of my online time. 1. Did I see that postfix can run sendmail milters? 2. If so, did I read that postfix can run these separately for inbound vs. outbound? 3. Can it run like a rbl blacklist on inbound and not outbound? 4. If the above is true, does this require separate configurations of postfix or is it already set to allow this out of the box? My reasoning... I've added a few milters which has drastically cut spam due to the extra time spent at the smtp level. For instance, running spamassassin takes a couple or few seconds. This bit of delay does in fact seem to stop many of the slamming spambots sort of like the design of milter-greylist. Except, I don't have to send a temp fail. So, this is a good thing. The negative is it also takes longer for my users to send mail as it is processed the same way during outgoing. Also, we run the SpamHaus blacklist. This works pretty good for inbound, but from time to time one of our hosting clients winds up on the blocklist because they are on a dynamic IP and someone else has recently used it for spamming. One could argue that my client should then go remove their IP from the blacklist to better insure their email actually makes it through any other level of spam filtering on other ISPs. But, that's a rosey concept! So, I would prefer to do it at the smtp level inbound so I can actually reject that mail while not having the embarrassing blocking going on with our users. Yes, this might sound like a double standard, but we do not provide connection service so only very rarely (never so far) does any virus actually send spam through our systems from client applications and I do actually monitor email all the time and stop any spamming immediately. Thanks for any input. John Hinton <who still keeps eyeballing postfix but is so comfortable with sendmail>

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Segmentation fault YUM
by Daniel Bruno 18 Sep '07

18 Sep '07

Hi, today in yum update show this problem: Segmentation fault Any idea about this problem?

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i cant find centos 4.4
by Blackburn, Marvin 18 Sep '07

18 Sep '07

Cant find this version. Can some point me in the right direction. _____________________________________ "He's no failure. He's not dead yet." William Lloyd George

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Application icons don't appear in taskbar at bottom of display - they disappear out of bottom right corner!
by Andrew Allen 18 Sep '07

18 Sep '07

Running CentOS 4.4 and something drastic appears to have happened with my display setup - application icons no longer appear in taskbar at bottom of display (when minimized) but disappear off bottom right-hand corner. So it's difficult to multi-task because I have to keep re- opening applications - can anybody suggest what I need to reconfigure please because I can't find any obvious display setting which will cure this problem - thanks. Andy

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cups 1.3 on Centos5?
by Dave 18 Sep '07

18 Sep '07

Hello, Does anyone have cups v1.3.1 running on Centos5? If so, i'd like to roll my own srpm and install it. I'm currently running 1.2.x and want to update to 1.3.1 as it has a bug fix that i need. Any help appreciated. Thanks. Dave.

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dual boot w/WinXP
by Ray Leventhal 18 Sep '07

18 Sep '07

Hi folks, I've been asked advice in an area that I'm not well versed and am hoping for some help. Having read a recent thread where booting to anaconda's kickstart wiped a partition table unexpectedly (to the user...it did what it was configured to do), I'm following the 'measure twice, cut once' rule and asking if this is possible and if so, what is best practice: I have a working WinXP SP2 workstation with an unused partition on the primary HDD. I'd like for the unused area to be used for dual booting CentOS5 but am not sure what needs to be done (if anything) to the config file for kickstart prior to booting with CD1 in the drive. Any suggestions or pointers to docs I may have missed are greatly appreciated. Best regards, ~Ray

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program to monitor USB keys
by Jerry Geis 18 Sep '07

18 Sep '07

I wrote a small program to monitor keyboards found on /dev/input/event* It works great but I always get EAGAIN from my read() function. google says this is normal when open() is used and O_NONBLOCK mode. I know this is slightly offtopic but I was wondering if the centos gurus that also program know anything about this. My goal was to not be eating CPU cycles with a small program that just monitors key presses. With EAGAIN always coming in the process though small keeps waking up. Or perhaps there is another way to do this that I am not aware of. Thanks for any tips. Jerry #include <stdio.h> #include <errno.h> #include <fcntl.h> #include <signal.h> #include <unistd.h> #include <string.h> #include <stdlib.h> #include <sys/stat.h> #include <linux/input.h> #include "smsignal.h" struct _msgnet_keycode { int keycode_value; char *keycode_str; int send_to_server; // .X will also send to server example: .4 says function 4 }; struct _msgnet_keycode msgnet_keycode[] = { {96, "KP_ENTER", 1}, // Keypad Enter Enter MUST be the first entry {28, "KP_ENTER", 1}, // Keypad Enter USB {14, "KP_BackSpace", 1}, // Keypad BS {55, "KP_Multiply", 1}, // Keypad * {98, "KP_Divide", 1}, // Keypad / {78, "KP_Plus", 1}, // Keypad + {74, "KP_Minus", 1}, // Keypad - {83, "KP_Period", 0}, // Keypad . {73, "KP_9", 0}, // Keypad 9 {72, "KP_8", 0}, // Keypad 8 {71, "KP_7", 0}, // Keypad 7 {77, "KP_6", 0}, // Keypad 6 {76, "KP_5", 0}, // Keypad 5 {75, "KP_4", 0}, // Keypad 4 {81, "KP_3", 0}, // Keypad 3 {80, "KP_2", 0}, // Keypad 2 {79, "KP_1", 0}, // Keypad 1 {82, "KP_0", 0}, // Keypad 0 {0, NULL} }; static int key_debug = 0; static int key_timeout = 0; /* incomplete command found so add KP_Enter and submit key presses */ static char keypad_buffer[200] = ""; #define FALSE (0) #define TRUE (1) /************************************************************ ** int main(int argc, char *argv[]) ** ************************************************************/ int main(int argc, char *argv[]) { int i; int fd; int bytes_read; int keycode; int done = FALSE; int any_keyboards; char *ptr; char *ptr_comma; #define MAX_KEY_WATCH (10) int fd[MAX_KEY_WATCH]; char input_name[200]; while(1) { done = FALSE; any_keyboards = FALSE; /* open all /dev/input/event devices */ for(i = 0; i < MAX_KEY_WATCH; i++) { sprintf(input_name, "/dev/input/event%d", i); fd[i] = open(input_name, O_RDONLY | O_NONBLOCK); if(fd[i] >= 0) { ioctl(fd[i], EVIOCGNAME (sizeof (input_name)), input_name); if(strstr(input_name, "Keyboard") || strstr(input_name, "1241:1203")) // Belkin keyboard { printf("Reading from (%d) %s\n", i, input_name); any_keyboards = TRUE; } else { close(fd[i]); fd[i] = -1; } } } if(any_keyboards == FALSE) { /* no keyboards found so sleep and try again */ sleep(10); } while(any_keyboards && done == FALSE) { int bytes_read; struct input_event event_keys[64]; for(i = 0; i < MAX_KEY_WATCH; i++) { if(fd[i] >= 0) { bytes_read = read(fd[i], event_keys, sizeof(event_keys)); if(bytes_read > 0) { /* there is a down event */ /* there is a UP event */ /* there is a UP event */ //printf("D %d %d %d\n", event_keys[0].type, event_keys[0].value, event_keys[0].code); //printf("U %d %d %d\n", event_keys[1].type, event_keys[1].value, event_keys[1].code); if(event_keys[0].type == 1 && event_keys[0].value == 1) { keycode = event_keys[0].code; for(find_key = 0; msgnet_keycode[find_key].keycode_str; find_key++) { if(msgnet_keycode[find_key].keycode_value == keycode) { KeyLog(find_key); break; } } } } else if(bytes_read < 0) { if(errno == EAGAIN) { /* EAGAIN is common on keyboard inputs */ /* but it HAPPENS ALOT */ } else { printf("Disconnect read=%d i=%d errno=%d\n", bytes_read, i, errno); sleep(2); done = TRUE; break; } } if(key_timeout) { KeyLog(0); /* KP_Enter */ } } } } for(i = 0; i < MAX_KEY_WATCH; i++) { if(fd[0] >= 0) { close(fd[i]); fd[0]= -1; } } } return(0); }

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