A few days ago my Redhat 6.0 server stopped letting me connect via SSH. I tried
connecting via telnet but that too did not let me in. I rebooted but still no
connection. The Banner comes up but there is no login prompt. I checked my hosts.allow
and hosts.deny files and they are all in order. I can FTP to the server and do
everything else as before just no shell access.
I got a strace (attached to email) from one of my attempts to login but have no idea
how to read it. Would someone take a quick look at this strace and give me an idea of
what the problem could be. Like I said everything is working but I cannot get remote
shell access.
Thanks
Jim VE
execve("/usr/sbin/in.telnetd", ["/usr/sbin/in.telnetd"], [/* 17 vars */]) = 0
brk(0) = 0x805b224
mmap(0, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x40014000
open("/etc/ld.so.preload", O_RDONLY) = -1 ENOENT (No such file or directory)
open("/etc/ld.so.cache", O_RDONLY) = 4
fstat(4, {st_mode=0, st_size=0, ...}) = 0
mmap(0, 18097, PROT_READ, MAP_PRIVATE, 4, 0) = 0x40015000
close(4) = 0
open("/usr/lib/libncurses.so.4", O_RDONLY) = 4
fstat(4, {st_mode=030467, st_size=0, ...}) = 0
read(4, "\177ELF\1\1\1\0\0\0\0\0\0\0\0\0\3"..., 4096) = 4096
mmap(0, 249100, PROT_READ|PROT_EXEC, MAP_PRIVATE, 4, 0) = 0x4001a000
mprotect(0x4004b000, 48396, PROT_NONE) = 0
mmap(0x4004b000, 36864, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED, 4, 0x30000) =
0x4004b000
mmap(0x40054000, 11532, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1,
0) = 0x40054000
close(4) = 0
open("/lib/libutil.so.1", O_RDONLY) = 4
fstat(4, {st_mode=0, st_size=0, ...}) = 0
read(4, "\177ELF\1\1\1\0\0\0\0\0\0\0\0\0\3"..., 4096) = 4096
mmap(0, 10856, PROT_READ|PROT_EXEC, MAP_PRIVATE, 4, 0) = 0x40057000
mprotect(0x40059000, 2664, PROT_NONE) = 0
mmap(0x40059000, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED, 4, 0x1000) =
0x40059000
close(4) = 0
open("/lib/libc.so.6", O_RDONLY) = 4
fstat(4, {st_mode=0, st_size=0, ...}) = 0
read(4, "\177ELF\1\1\1\0\0\0\0\0\0\0\0\0\3"..., 4096) = 4096
mmap(0, 1001532, PROT_READ|PROT_EXEC, MAP_PRIVATE, 4, 0) = 0x4005a000
mprotect(0x40147000, 30780, PROT_NONE) = 0
mmap(0x40147000, 16384, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED, 4, 0xec000) =
0x40147000
mmap(0x4014b000, 14396, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1,
0) = 0x4014b000
close(4) = 0
mprotect(0x4005a000, 970752, PROT_READ|PROT_WRITE) = 0
mprotect(0x4005a000, 970752, PROT_READ|PROT_EXEC) = 0
munmap(0x40015000, 18097) = 0
personality(PER_LINUX) = 0
getpid() = 28839
getpeername(0, {sin_family=AF_INET, sin_port=htons(2207),
sin_addr=inet_addr("65.187.202.93")}, [16]) = 0
setsockopt(0, SOL_SOCKET, SO_KEEPALIVE, [1], 4) = 0
open("/dev/ptmx", O_RDWR) = 4
statfs("/dev/pts", {f_type=0x1cd1, f_bsize=1024, f_blocks=0, f_bfree=0, f_files=0,
f_ffree=0, f_namelen=255}}) = 0
ioctl(4, TCGETS, {B38400 opost isig icanon echo ...}) = 0
ioctl(4, 0x80045430, 0xbfffda98) = 0
stat("/dev/pts/0", {st_mode=S_IFREG|S_ISUID, st_size=0, ...}) = 0
statfs("/dev/pts/0", {f_type=0x1cd1, f_bsize=1024, f_blocks=0, f_bfree=0, f_files=0,
f_ffree=0, f_namelen=255}}) = 0
ioctl(4, 0x40045431, 0xbfffeb8c) = 0
ioctl(4, TCGETS, {B38400 opost isig icanon echo ...}) = 0
ioctl(4, 0x80045430, 0xbfffeb14) = 0
stat("/dev/pts/0", {st_mode=S_IFREG|S_ISUID, st_size=0, ...}) = 0
open("/dev/pts/0", O_RDWR|O_NOCTTY) = 5
brk(0) = 0x805b224
brk(0x805b63c) = 0x805b63c
brk(0x805c000) = 0x805c000
socket(PF_UNIX, SOCK_STREAM, 0) = 6
connect(6, {sun_family=AF_UNIX, sun_path="/var/run/.nscd_socket"}, 110) = -1
ECONNREFUSED (Connection refused)
close(6) = 0
open("/etc/nsswitch.conf", O_RDONLY) = 6
recvmsg(6, 0xbffffa08, 0x4014ad40) = -1 ENOSYS (Function not implemented)
fstat(6, {st_mode=S_IFDIR|S_ISUID|0150, st_size=0, ...}) = 0
mmap(0, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x40015000
read(6, "#\n# /etc/nsswitch.conf\n#\n# An"..., 4096) = 1744
read(6, "", 4096) = 0
close(6) = 0
munmap(0x40015000, 4096) = 0
open("/etc/ld.so.cache", O_RDONLY) = 6
fstat(6, {st_mode=0, st_size=0, ...}) = 0
mmap(0, 18097, PROT_READ, MAP_PRIVATE, 6, 0) = 0x40015000
close(6) = 0
open("/lib/libnss_files.so.2", O_RDONLY) = 6
fstat(6, {st_mode=0, st_size=0, ...}) = 0
read(6, "\177ELF\1\1\1\0\0\0\0\0\0\0\0\0\3"..., 4096) = 4096
mmap(0, 36384, PROT_READ|PROT_EXEC, MAP_PRIVATE, 6, 0) = 0x4014f000
mprotect(0x40157000, 3616, PROT_NONE) = 0
mmap(0x40157000, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED, 6, 0x7000) =
0x40157000
close(6) = 0
munmap(0x40015000, 18097) = 0
gettimeofday({1011481866, 462125}, NULL) = 0
getpid() = 28839
brk(0x805d000) = 0x805d000
open("/etc/resolv.conf", O_RDONLY) = 6
fstat(6, {st_mode=S_IFDIR|S_ISUID|032, st_size=0, ...}) = 0
mmap(0, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x40015000
read(6, "search bible14.org\nsearch invit"..., 4096) = 89
read(6, "", 4096) = 0
close(6) = 0
munmap(0x40015000, 4096) = 0
open("/etc/host.conf", O_RDONLY) = 6
fstat(6, {st_mode=S_ISUID|0246, st_size=0, ...}) = 0
mmap(0, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x40015000
read(6, "order hosts,bind\nmulti on\n", 4096) = 26
read(6, "", 4096) = 0
close(6) = 0
munmap(0x40015000, 4096) = 0
open("/etc/hosts", O_RDONLY) = 6
fcntl(6, F_GETFD) = 0
fcntl(6, F_SETFD, FD_CLOEXEC) = 0
fstat(6, {st_mode=030676, st_size=0, ...}) = 0
mmap(0, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x40015000
read(6, "127.0.0.1\t\tlocalhost localhost"..., 4096) = 81
read(6, "", 4096) = 0
close(6) = 0
munmap(0x40015000, 4096) = 0
open("/etc/ld.so.cache", O_RDONLY) = 6
fstat(6, {st_mode=0, st_size=0, ...}) = 0
mmap(0, 18097, PROT_READ, MAP_PRIVATE, 6, 0) = 0x40015000
close(6) = 0
open("/lib/libnss_nisplus.so.2", O_RDONLY) = 6
fstat(6, {st_mode=0, st_size=0, ...}) = 0
read(6, "\177ELF\1\1\1\0\0\0\0\0\0\0\0\0\3"..., 4096) = 4096
mmap(0, 41972, PROT_READ|PROT_EXEC, MAP_PRIVATE, 6, 0) = 0x40158000
mprotect(0x40161000, 5108, PROT_NONE) = 0
mmap(0x40161000, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED, 6, 0x8000) =
0x40161000
close(6) = 0
open("/lib/libnsl.so.1", O_RDONLY) = 6
fstat(6, {st_mode=0, st_size=0, ...}) = 0
read(6, "\177ELF\1\1\1\0\0\0\0\0\0\0\0\0\3"..., 4096) = 4096
mmap(0, 88104, PROT_READ|PROT_EXEC, MAP_PRIVATE, 6, 0) = 0x40163000
mprotect(0x40175000, 14376, PROT_NONE) = 0
mmap(0x40175000, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED, 6, 0x11000) =
0x40175000
mmap(0x40177000, 6184, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1,
0) = 0x40177000
close(6) = 0
munmap(0x40015000, 18097) = 0
uname({sys="Linux", node="grace.bible14.org", ...}) = 0
open("/var/nis/NIS_COLD_START", O_RDONLY) = -1 ENOENT (No such file or directory)
open("/etc/ld.so.cache", O_RDONLY) = 6
fstat(6, {st_mode=0, st_size=0, ...}) = 0
mmap(0, 18097, PROT_READ, MAP_PRIVATE, 6, 0) = 0x40015000
close(6) = 0
open("/lib/libnss_nis.so.2", O_RDONLY) = 6
fstat(6, {st_mode=0, st_size=0, ...}) = 0
read(6, "\177ELF\1\1\1\0\0\0\0\0\0\0\0\0\3"..., 4096) = 4096
mmap(0, 38488, PROT_READ|PROT_EXEC, MAP_PRIVATE, 6, 0) = 0x40179000
mprotect(0x40181000, 5720, PROT_NONE) = 0
mmap(0x40181000, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED, 6, 0x7000) =
0x40181000
close(6) = 0
munmap(0x40015000, 18097) = 0
uname({sys="Linux", node="grace.bible14.org", ...}) = 0
open("/etc/ld.so.cache", O_RDONLY) = 6
fstat(6, {st_mode=0, st_size=0, ...}) = 0
mmap(0, 18097, PROT_READ, MAP_PRIVATE, 6, 0) = 0x40015000
close(6) = 0
open("/lib/libnss_dns.so.2", O_RDONLY) = 6
fstat(6, {st_mode=0, st_size=0, ...}) = 0
read(6, "\177ELF\1\1\1\0\0\0\0\0\0\0\0\0\3"..., 4096) = 4096
mmap(0, 15088, PROT_READ|PROT_EXEC, MAP_PRIVATE, 6, 0) = 0x40183000
mprotect(0x40186000, 2800, PROT_NONE) = 0
mmap(0x40186000, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED, 6, 0x2000) =
0x40186000
close(6) = 0
open("/lib/libresolv.so.2", O_RDONLY) = 6
fstat(6, {st_mode=0, st_size=0, ...}) = 0
read(6, "\177ELF\1\1\1\0\0\0\0\0\0\0\0\0\3"..., 4096) = 4096
mmap(0, 60956, PROT_READ|PROT_EXEC, MAP_PRIVATE, 6, 0) = 0x40187000
mprotect(0x40193000, 11804, PROT_NONE) = 0
mmap(0x40193000, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED, 6, 0xb000) =
0x40193000
mmap(0x40194000, 7708, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1,
0) = 0x40194000
close(6) = 0
brk(0x805e000) = 0x805e000
munmap(0x40015000, 18097) = 0
socket(PF_INET, SOCK_DGRAM, IPPROTO_IP) = 6
connect(6, {sin_family=AF_INET, sin_port=htons(53),
sin_addr=inet_addr("216.47.44.65")}, 16) = 0
send(6, "\200\201\1\0\0\1\0\0\0\0\0\0\002"..., 44, 0) = 44
time(NULL) = 1011481866
SYS_168(0xbfffecd8, 0x1, 0x1388, 0x1388, 0xbfffecd8) = 1
recvfrom(6, "\200\201\201\200\0\1\0\1\0\3\0\3"..., 1024, 0, {sin_family=AF_INET,
sin_port=htons(53), sin_addr=inet_addr("216.47.44.65")}, [16]) = 202
close(6) = 0
uname({sys="Linux", node="grace.bible14.org", ...}) = 0
socket(PF_UNIX, SOCK_STREAM, 0) = 6
connect(6, {sun_family=AF_UNIX, sun_path="/var/run/.nscd_socket"}, 110) = -1
ECONNREFUSED (Connection refused)
close(6) = 0
open("/etc/hosts", O_RDONLY) = 6
fcntl(6, F_GETFD) = 0
fcntl(6, F_SETFD, FD_CLOEXEC) = 0
fstat(6, {st_mode=030676, st_size=0, ...}) = 0
mmap(0, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x40015000
read(6, "127.0.0.1\t\tlocalhost localhost"..., 4096) = 81
close(6) = 0
munmap(0x40015000, 4096) = 0
write(0, "\377\375\30\377\375 \377\375#\377"..., 12) = 12
read(0, "\377\375\3", 8192) = 3
write(0, "\377\373\3", 3) = 3
read(0, "\377\373\30", 8192) = 3
read(0, "\377\374 \377\374#\377\374\'", 8192) = 9
write(0, "\377\372\30\1\377\360", 6) = 6
read(0, "\377\372\30\0ansi\377\360", 8192) = 10
access("/usr/share/terminfo/a/ansi", R_OK) = 0
open("/usr/share/terminfo/a/ansi", O_RDONLY) = 6
read(6, "\32\1(\0\27\0\20\0}\1D\2", 12) = 12
read(6, "ansi|ansi/pc-term compatible wit"..., 40) = 40
read(6, "\0\1\0\0\0\0\0\0\0\0\0\0\0\1\1\0"..., 23) = 23
read(6, "\0", 1) = 1
read(6, "P\0\10\0\30\0\377\377\377\377\377"..., 32) = 32
read(6, "\0\0\4\0\6\0\377\377\10\0\r\0\24"..., 762) = 762
read(6, "\33[Z\0\7\0\r\0\33[2g\0\33[H\33["..., 580) = 580
close(6) = 0
ioctl(1, TCGETS, 0xbffff0f8) = -1 EINVAL (Invalid argument)
ioctl(2, TCGETS, 0xbffff0d4) = -1 EINVAL (Invalid argument)
fork() = 28840
SYS_174(0x1, 0xbffff9cc, 0xbffff940, 0x8, 0x1) = 0
ioctl(4, TCGETS, {B38400 opost isig icanon echo ...}) = 0
write(0, "\377\375\1\377\375\37\377\373\5\377"..., 12) = 12
read(0, 0x80550e0, 8192) = ? ERESTARTSYS (To be restarted)
--- SIGCHLD (Child exited) ---
read(0, "\377\374\1", 8192) = 3
read(0, "\377\373\37\377\372\37\0\204\0G\377"..., 8192) = 18
ioctl(4, TCGETS, {B9600 opost isig icanon echo ...}) = 0
ioctl(4, TIOCSWINSZ, {ws_row=71, ws_col=132, ws_xpixel=33, ws_ypixel=0}) = 0
ioctl(4, TIOCPKT, [1]) = 0
ioctl(0, FIONBIO, [1]) = 0
ioctl(4, FIONBIO, [1]) = 0
setsockopt(0, SOL_SOCKET, SO_OOBINLINE, [1], 4) = 0
SYS_174(0x14, 0xbffff7fc, 0xbffff770, 0x8, 0x14) = 0
SYS_174(0x16, 0xbffff7f4, 0xbffff768, 0x8, 0x16) = 0
SYS_174(0x11, 0xbffff810, 0xbffff784, 0x8, 0x11) = 0
open("/dev/tty", O_RDWR) = -1 ENXIO (Device not configured)
uname({sys="Linux", node="grace.bible14.org", ...}) = 0
open("/etc/issue.net", O_RDONLY) = 6
fstat(6, {st_mode=030347, st_size=0, ...}) = 0
mmap(0, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x40015000
read(6, "\nRed Hat Linux release 6.0 (Hed"..., 4096) = 63
read(6, "", 4096) = 0
close(6) = 0
munmap(0x40015000, 4096) = 0
select(1, [0], [0], [0], NULL) = 1 (out [0])
write(0, "\377\373\1\r\nRed Hat Linux rele"..., 69) = 69
select(5, [0 4], [], [0], NULL) = 1 (in [0])
read(0, "\377\375\1", 8192) = 3
select(5, [0 4], [], [0], NULL
