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Re: iptables: hashlimit (is a BUG?) [message #37475 is a reply to message #9918] Tue, 15 September 2009 10:38 Go to previous message
lazy
Messages: 16
Registered: January 2008
Junior Member
kernel rhel5 64.7 64 bit running Debian 5.0 64 bit
ipv6 is not compiled in, kernel config in att
iptables 1.4.2 from debian

any pointers what to do ?

strace iptables -I FORWARD -p tcp -s x.x.x.0/23 -m hashlimit --hashlimit-above 2000/second --hashlimit-mode srcip --hashlimit-srcmask 23 -j DROP
...
socket(PF_INET, SOCK_RAW, IPPROTO_RAW) = 3
open("/proc/sys/kernel/modprobe", O_RDONLY) = 4
read(4, "/sbin/modprobe\n"..., 1024) = 15
close(4) = 0
clone(child_stack=0, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x2ace19cebe40) = 30911
wait4(-1, [{WIFEXITED(s) && WEXITSTATUS(s) == 0}], 0, NULL) = 30911
--- SIGCHLD (Child exited) @ 0 (0) ---
getsockopt(3, SOL_IP, 0x42 /* IP_??? */, " hashlimit\0\357\31\316*\0\0`\315\17\32\316*\0\0\22\20\20\31\ 316\0 "..., [30]) = 0
close(3) = 0
socket(PF_INET, SOCK_RAW, IPPROTO_RAW) = 3
getsockopt(3, SOL_IP, 0x42 /* IP_??? */, 0x7fff11027ee0, 0x7fff11027f0c) = -1 EPROTONOSUPPORT (Protocol not supported)
close(3) = 0
open("/lib/xtables/libxt_tcp.so", O_RDONLY) = 3
read(3, "\177ELF\2\1\1\0\0\0\0\0\0\0\0\0\3\0>\0\1\0\0\0`\f\0\0\0\0\0\0@ "..., 832) = 832
fstat(3, {st_mode=S_IFREG|0644, st_size=11408, ...}) = 0
mmap(NULL, 2106704, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 0x2ace1a0fd000
mprotect(0x2ace1a0ff000, 2097152, PROT_NONE) = 0
mmap(0x2ace1a2ff000, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x2000) = 0x2ace1a2ff000
close(3) = 0
write(2, "iptables v1.4.2: "..., 17iptables v1.4.2: ) = 17
write(2, "Unknown arg `(null)'"..., 20Unknown arg `(null)') = 20
write(2, "\n"..., 1
) = 1
write(2, "Try `iptables -h' or 'iptables --"..., 61Try `iptables -h' or 'iptables --help' for more information.
) = 61
exit_group(2)


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