My server is stopping to respond for 5 to 20 minutes and then is coming back. This issue is very often, especially when I uploading via ftp or posting data via forms. I’m getting time out errors on every port except ping. A strange think is that if I am already connected to the server via SSH, the connection remains open. I have tried to restart many services (network, proftpd, httpd, named). I have also tried with ispconfig firewall off, but no luck. The only solution is a server restart. My netstat -tap during a not responding situation:
Thanks for your reply, There is no errors during the time my server stops responding at var/log/messages. There is an error when restarting proftpd about IPV6. I don’t know how to fix it. My /var/log/messages when restarting proftpd: There is also a possible hacking attempt starting 20 hours ago but my problem is there since I setup this server. Part of my /var/log/messages for the last 20 hours: Part of my /var/log/secure for the last 20 hours: I don’t know if there are other useful log files to look.
Please post your proftpd.conf file. Does this line only appaers in the timespan while you are unable to connect?
Thanks for your reply, This line has nothing to do with my problem after all. When I turned off proftpd for 5 minutes it disappeared. But the problem remain This is my /etc/proftpd.conf Thank you
this is my /etc/hosts Code: # Do not remove the following line, or various programs # that require network functionality will fail. 127.0.0.1 host1.***host.gr host1 localhost.localdomain localhost SELinux is disabled. This is my services list chkconfig --list Code: acpid 0:off 1:off 2:off 3:on 4:on 5:on 6:off anacron 0:off 1:off 2:on 3:on 4:on 5:on 6:off atd 0:off 1:off 2:off 3:on 4:on 5:on 6:off autofs 0:off 1:off 2:off 3:on 4:on 5:on 6:off avahi-daemon 0:off 1:off 2:off 3:on 4:on 5:off 6:off avahi-dnsconfd 0:off 1:off 2:off 3:off 4:off 5:off 6:off bluetooth 0:off 1:off 2:on 3:on 4:on 5:off 6:off cpuspeed 0:off 1:on 2:on 3:on 4:on 5:on 6:off crond 0:off 1:off 2:on 3:on 4:on 5:on 6:off cups 0:off 1:off 2:on 3:on 4:on 5:off 6:off cups-config-daemon 0:off 1:off 2:off 3:on 4:on 5:off 6:off dc_client 0:off 1:off 2:off 3:off 4:off 5:off 6:off dc_server 0:off 1:off 2:off 3:off 4:off 5:off 6:off dhcdbd 0:off 1:off 2:off 3:off 4:off 5:off 6:off diskdump 0:off 1:off 2:off 3:off 4:off 5:off 6:off dovecot 0:off 1:off 2:on 3:on 4:off 5:on 6:off firstboot 0:off 1:off 2:off 3:on 4:off 5:on 6:off gpm 0:off 1:off 2:on 3:on 4:on 5:on 6:off haldaemon 0:off 1:off 2:off 3:on 4:on 5:off 6:off hidd 0:off 1:off 2:on 3:on 4:on 5:off 6:off httpd 0:off 1:off 2:on 3:on 4:off 5:on 6:off irda 0:off 1:off 2:off 3:off 4:off 5:off 6:off irqbalance 0:off 1:off 2:on 3:on 4:on 5:on 6:off kudzu 0:off 1:off 2:off 3:on 4:on 5:on 6:off lisa 0:off 1:off 2:off 3:off 4:off 5:off 6:off lm_sensors 0:off 1:off 2:on 3:on 4:on 5:on 6:off mailman 0:off 1:off 2:off 3:off 4:off 5:on 6:off mdmonitor 0:off 1:off 2:on 3:on 4:on 5:on 6:off mdmpd 0:off 1:off 2:off 3:off 4:off 5:off 6:off messagebus 0:off 1:off 2:off 3:on 4:on 5:on 6:off mysqld 0:off 1:off 2:on 3:on 4:off 5:on 6:off named 0:off 1:off 2:on 3:on 4:off 5:on 6:off netdump 0:off 1:off 2:off 3:off 4:off 5:off 6:off netfs 0:off 1:off 2:off 3:on 4:on 5:off 6:off netplugd 0:off 1:off 2:off 3:off 4:off 5:off 6:off network 0:off 1:off 2:on 3:on 4:on 5:on 6:off nfs 0:off 1:off 2:off 3:off 4:off 5:off 6:off nfslock 0:off 1:off 2:off 3:on 4:on 5:off 6:off nscd 0:off 1:off 2:off 3:off 4:off 5:off 6:off ntpd 0:off 1:off 2:on 3:on 4:off 5:on 6:off portmap 0:off 1:off 2:off 3:on 4:on 5:on 6:off proftpd 0:off 1:off 2:on 3:on 4:off 5:on 6:off psacct 0:off 1:off 2:off 3:off 4:off 5:off 6:off rdisc 0:off 1:off 2:off 3:off 4:off 5:off 6:off readahead 0:off 1:off 2:off 3:off 4:off 5:on 6:off readahead_early 0:off 1:off 2:on 3:on 4:on 5:on 6:off rpcgssd 0:off 1:off 2:off 3:on 4:on 5:on 6:off rpcidmapd 0:off 1:off 2:off 3:on 4:on 5:on 6:off rpcsvcgssd 0:off 1:off 2:off 3:off 4:off 5:off 6:off saslauthd 0:off 1:off 2:on 3:on 4:off 5:on 6:off sendmail 0:off 1:off 2:off 3:off 4:on 5:off 6:off smartd 0:off 1:off 2:on 3:on 4:on 5:on 6:off smb 0:off 1:off 2:off 3:off 4:off 5:off 6:off spamassassin 0:off 1:off 2:off 3:off 4:off 5:on 6:off squid 0:off 1:off 2:off 3:off 4:off 5:off 6:off sshd 0:off 1:off 2:on 3:on 4:on 5:on 6:off syslog 0:off 1:off 2:on 3:on 4:on 5:on 6:off tomcat5 0:off 1:off 2:off 3:off 4:off 5:off 6:off tux 0:off 1:off 2:off 3:off 4:off 5:off 6:off vncserver 0:off 1:off 2:off 3:off 4:off 5:off 6:off webmin 0:off 1:off 2:on 3:on 4:off 5:on 6:off winbind 0:off 1:off 2:off 3:off 4:off 5:off 6:off wpa_supplicant 0:off 1:off 2:off 3:off 4:off 5:off 6:off xend 0:off 1:off 2:on 3:on 4:on 5:on 6:off xendomains 0:off 1:off 2:off 3:on 4:on 5:on 6:off xfs 0:off 1:off 2:on 3:on 4:on 5:on 6:off ypbind 0:off 1:off 2:off 3:off 4:off 5:off 6:off yum 0:off 1:off 2:off 3:off 4:off 5:off 6:off During a not responding situation I have try to restart httpd, proftpd, network & ispconfig_server
You can try to chane it to Code: # Do not remove the following line, or various programs # that require network functionality will fail. 127.0.0.1 localhost.localdomain localhost <your IP> host1.vfxhost.gr host1 but I'm not sure if it helps. I could imagine it's a problem with your network card (maybe the kernel doesn't have the correct driver for it)...
Thanks falko, I change it to Code: # Do not remove the following line, or various programs # that require network functionality will fail. 127.0.0.1 localhost.localdomain localhost 85.30.21.10 host1.***host.gr host1 85.30.21.11 host1.***host.gr host1 85.30.21.12 host1.***host.gr host1 85.30.21.13 host1.***host.gr host1 85.30.21.14 host1.***host.gr host1 The network is working. If I am already connected to the server via SSH, the connection remains open. There are two network cards. Do you thing that is wrong? this is my ifconfig output Code: eth1 Link encap:Ethernet HWaddr 00:0A:5E:64:7B:A3 inet addr:85.30.21.10 Bcast:85.30.21.15 Mask:255.255.255.248 inet6 addr: fe80::20a:5eff:fe64:7ba3/64 Scope:Link UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 RX packets:5573680 errors:0 dropped:0 overruns:1 frame:0 TX packets:4655673 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:1000 RX bytes:1451763657 (1.3 GiB) TX bytes:1577678634 (1.4 GiB) Interrupt:17 Base address:0xa800 eth2 Link encap:Ethernet HWaddr 00:0A:5E:64:7F:A7 inet addr:85.30.21.11 Bcast:85.30.21.15 Mask:255.255.255.248 inet6 addr: fe80::20a:5eff:fe64:7fa7/64 Scope:Link UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 RX packets:1265295 errors:0 dropped:0 overruns:1 frame:0 TX packets:50 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:1000 RX bytes:81679819 (77.8 MiB) TX bytes:3540 (3.4 KiB) Interrupt:21 Base address:0xcc00 eth2:1 Link encap:Ethernet HWaddr 00:0A:5E:64:7F:A7 inet addr:85.30.21.12 Bcast:85.30.21.15 Mask:255.255.255.248 UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 Interrupt:21 Base address:0xcc00 eth2:2 Link encap:Ethernet HWaddr 00:0A:5E:64:7F:A7 inet addr:85.30.21.13 Bcast:85.30.21.15 Mask:255.255.255.248 UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 Interrupt:21 Base address:0xcc00 eth2:3 Link encap:Ethernet HWaddr 00:0A:5E:64:7F:A7 inet addr:85.30.21.14 Bcast:85.30.21.15 Mask:255.255.255.248 UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 Interrupt:21 Base address:0xcc00 lo Link encap:Local Loopback inet addr:127.0.0.1 Mask:255.0.0.0 inet6 addr: ::1/128 Scope:Host UP LOOPBACK RUNNING MTU:16436 Metric:1 RX packets:561131 errors:0 dropped:0 overruns:0 frame:0 TX packets:561131 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:0 RX bytes:77269514 (73.6 MiB) TX bytes:77269514 (73.6 MiB)
Yes, I have try to restart some services, netstat -tap. Its working fine. What do you thing about the two network cards?
You can try to remove one of them to see if that changes anything. Then put it back in and remove the other one and test again.
Same Problem I am having the exact same problem. My Fedora Core 5 server has been up and running for nearly two months and the problem just started within the past week. The really strange part is that I have two identical Dell servers running identical hardware but one is running Fedora Core 4/ISPConfig and one is running Fedora Core 5/ISPConfig. Only the server running FC5 is having this problem. I did notice last night that when the server quit responding about 12AM the server ran out of memory and died. Here is the error log. Also I have a bunch of these lame server resolving messages? Is that some kind of attack? Nov 13 23:46:45 tao named[10193]: lame server resolving '249.red-82-159-109.user.auna.net' (in 'user.auna.net'?): 62.42.63.51#53 Nov 14 00:01:29 tao kernel: local invoked oom-killer: gfp_mask=0x201d2, order=0, oomkilladj=0 Nov 14 00:04:21 tao kernel: Nov 14 00:04:21 tao kernel: Call Trace: Nov 14 00:04:25 tao kernel: [<ffffffff802691d9>] show_trace+0x34/0x47 Nov 14 00:04:27 tao kernel: [<ffffffff802691fe>] dump_stack+0x12/0x17 Nov 14 00:04:27 tao kernel: [<ffffffff802bbefe>] out_of_memory+0x53/0x271 Nov 14 00:04:27 tao kernel: [<ffffffff8020f1b5>] __alloc_pages+0x23a/0x2c3 Nov 14 00:04:27 tao kernel: [<ffffffff80212790>] __do_page_cache_readahead+0x98/0x1da Nov 14 00:04:27 tao kernel: [<ffffffff802131db>] filemap_nopage+0x14b/0x351 Nov 14 00:04:28 tao kernel: [<ffffffff80208aa6>] __handle_mm_fault+0x472/0xc42 Nov 14 00:04:29 tao kernel: [<ffffffff802645b3>] do_page_fault+0x49d/0x815 Nov 14 00:04:29 tao kernel: [<ffffffff8025ccdd>] error_exit+0x0/0x84 Nov 14 00:04:35 tao kernel: DWARF2 unwinder stuck at error_exit+0x0/0x84 Nov 14 00:04:46 tao kernel: Leftover inexact backtrace: Nov 14 00:04:55 tao kernel: Nov 14 00:04:55 tao kernel: Mem-info: Nov 14 00:04:55 tao kernel: Node 0 DMA per-cpu: Nov 14 00:05:01 tao kernel: cpu 0 hot: high 0, batch 1 used:0 Nov 14 00:05:01 tao kernel: cpu 0 cold: high 0, batch 1 used:0 Nov 14 00:05:01 tao kernel: cpu 1 hot: high 0, batch 1 used:0 Nov 14 00:05:01 tao kernel: cpu 1 cold: high 0, batch 1 used:0 Nov 14 00:05:14 tao kernel: Node 0 DMA32 per-cpu: Nov 14 00:06:13 tao kernel: cpu 0 hot: high 186, batch 31 used:72 Nov 14 00:07:13 tao kernel: cpu 0 cold: high 62, batch 15 used:49 Nov 14 00:07:18 tao kernel: cpu 1 hot: high 186, batch 31 used:49 Nov 14 00:07:18 tao kernel: cpu 1 cold: high 62, batch 15 used:43 Nov 14 00:07:18 tao kernel: Node 0 Normal per-cpu: empty Nov 14 00:07:18 tao kernel: Node 0 HighMem per-cpu: empty Nov 14 00:07:25 tao kernel: Free pages: 8016kB (0kB HighMem) Nov 14 00:07:28 tao kernel: Active:96223 inactive:128382 dirty:0 writeback:0 unstable:0 free:2004 slab:6941 mapped:988 pagetables:14132 Nov 14 00:07:28 tao kernel: Node 0 DMA free:4008kB min:40kB low:48kB high:60kB active:4496kB inactive:2340kB present:10524kB pages_scanned:12918 all_unreclaimable? yes Nov 14 00:07:29 tao kernel: lowmem_reserve[]: 0 992 992 992 Nov 14 00:07:30 tao kernel: Node 0 DMA32 free:4008kB min:4008kB low:5008kB high:6012kB active:380396kB inactive:511188kB present:1015812kB pages_scanned:4046757 all_unreclaimable? yes Nov 14 00:07:31 tao kernel: lowmem_reserve[]: 0 0 0 0 Nov 14 00:07:32 tao kernel: Node 0 Normal free:0kB min:0kB low:0kB high:0kB active:0kB inactive:0kB present:0kB pages_scanned:0 all_unreclaimable? no Nov 14 00:07:32 tao kernel: lowmem_reserve[]: 0 0 0 0 Nov 14 00:07:33 tao kernel: Node 0 HighMem free:0kB min:128kB low:128kB high:128kB active:0kB inactive:0kB present:0kB pages_scanned:0 all_unreclaimable? no Nov 14 00:07:35 tao kernel: lowmem_reserve[]: 0 0 0 0 Nov 14 00:07:37 tao kernel: Node 0 DMA: 0*4kB 1*8kB 0*16kB 1*32kB 0*64kB 1*128kB 1*256kB 1*512kB 1*1024kB 1*2048kB 0*4096kB = 4008kB Nov 14 00:07:39 tao kernel: Node 0 DMA32: 30*4kB 0*8kB 9*16kB 5*32kB 10*64kB 1*128kB 1*256kB 1*512kB 0*1024kB 1*2048kB 0*4096kB = 4008kB Nov 14 00:07:40 tao kernel: Node 0 Normal: empty Nov 14 00:07:40 tao kernel: Node 0 HighMem: empty Any more help with this would be greatly appreciated. My server dies 2 or 3 times per day and has to be rebooted.
I think you should install munin ( http://munin.projects.linpro.no/ ) on your FC5 system so that you get graphs of what is happening on your system. This might help to track down the problem. Also, do you see unusual processes in the output of Code: top ?
