I am connecting to a chat server thru MASQ firewall box.
This is how it looks like on the ppp0 from firewall box
to the outside:
...
15:21:37.869293 195.66.208.1.80 > 10.11.7.121.45412: P 3895:4034(139) ack 1 win 17520 (DF)
15:21:37.872779 10.11.7.121.45412 > 195.66.208.1.80: . ack 4034 win 27676 (DF)
15:21:41.919860 195.66.208.1.80 > 10.11.7.121.45412: P 4034:4240(206) ack 1 win 17520 (DF)
15:21:41.924124 10.11.7.121.45412 > 195.66.208.1.80: . ack 4240 win 30192 (DF)
15:21:43.935594 195.66.208.1.80 > 10.11.7.121.45412: P 4240:4372(132) ack 1 win 17520 (DF)
15:21:43.940110 10.11.7.121.45412 > 195.66.208.1.80: . ack 4372 win 30192 (DF)
15:21:49.977665 195.66.208.1.80 > 10.11.7.121.45412: P 4372:4485(113) ack 1 win 17520 (DF)
15:21:49.983552 10.11.7.121.45412 > 195.66.208.1.80: . ack 4485 win 30192 (DF)
15:21:51.999684 195.66.208.1.80 > 10.11.7.121.45412: P 4485:4585(100) ack 1 win 17520 (DF)
15:21:52.997188 195.66.208.1.80 > 10.11.7.121.45412: P 4485:4585(100) ack 1 win 17520 (DF)
15:21:54.996143 195.66.208.1.80 > 10.11.7.121.45412: P 4485:4585(100) ack 1 win 17520 (DF)
15:21:58.995452 195.66.208.1.80 > 10.11.7.121.45412: P 4485:4585(100) ack 1 win 17520 (DF)
15:22:00.086598 195.66.208.1.80 > 10.11.7.121.45412: P 4585:4717(132) ack 1 win 17520 (DF)
15:22:06.996737 195.66.208.1.80 > 10.11.7.121.45412: P 4485:4795(310) ack 1 win 17520 (DF)
15:22:18.224585 195.66.208.1.80 > 10.11.7.121.45412: P 4795:4816(21) ack 1 win 17520 (DF)
...
As you see client does not respond anymore.
This is tcpdump on the wire from firewall to client:
...
15:21:37.869539 195.66.208.1.80 > 1.1.3.1.45412: P 3515:3654(139) ack 1 win 17520 (DF)
15:21:37.872568 1.1.3.1.45412 > 195.66.208.1.80: . ack 3654 win 27676 (DF)
15:21:41.920109 195.66.208.1.80 > 1.1.3.1.45412: P 3654:3860(206) ack 1 win 17520 (DF)
15:21:41.923929 1.1.3.1.45412 > 195.66.208.1.80: . ack 3860 win 30192 (DF)
15:21:43.935837 195.66.208.1.80 > 1.1.3.1.45412: P 3860:3992(132) ack 1 win 17520 (DF)
15:21:43.939919 1.1.3.1.45412 > 195.66.208.1.80: . ack 3992 win 30192 (DF)
15:21:49.977911 195.66.208.1.80 > 1.1.3.1.45412: P 3992:4105(113) ack 1 win 17520 (DF)
15:21:49.983361 1.1.3.1.45412 > 195.66.208.1.80: . ack 4105 win 30192 (DF)
and then silence.
Looks like firewall forgot about our connection. What's going on?
Kernel: 2.4.20, .config is at the end of this mail.
# lsmod
Module Size Used by Not tainted
ipt_state 536 2 (autoclean)
ipt_MASQUERADE 1272 2 (autoclean)
ipt_REDIRECT 728 3 (autoclean)
iptable_mangle 2104 1 (autoclean)
iptable_filter 1676 0 (autoclean) (unused)
af_packet 9128 0 (autoclean)
autofs 9972 1
ip_nat_irc 2320 0 (unused)
ip_conntrack_irc 2896 1
ip_nat_ftp 2864 0 (unused)
iptable_nat 14136 3 [ipt_MASQUERADE ipt_REDIRECT ip_nat_irc ip_nat_ftp]
ip_tables 10872 8 [ipt_state ipt_MASQUERADE ipt_REDIRECT iptable_mangle iptable_filter iptable_nat]
ip_conntrack_ftp 3760 1
ip_conntrack 17536 4 [ipt_state ipt_MASQUERADE ipt_REDIRECT ip_nat_irc ip_conntrack_irc ip_nat_ftp iptable_nat ip_conntrack_ftp]
Relevant iptables rule:
Chain POSTROUTING (policy ACCEPT 5 packets, 380 bytes)
6 360 MASQUERADE all -- * ppp0 0.0.0.0/0 0.0.0.0/0
I'd be happy to provide more info on known connections and the like,
but I failed to find an iptables equivalent of ipchains -M. :(
-- vda.config ======= CONFIG_X86=y CONFIG_UID16=y CONFIG_EXPERIMENTAL=y CONFIG_MODULES=y CONFIG_MODVERSIONS=y CONFIG_KMOD=y CONFIG_M386=y CONFIG_X86_L1_CACHE_SHIFT=4 CONFIG_RWSEM_GENERIC_SPINLOCK=y CONFIG_X86_PPRO_FENCE=y CONFIG_X86_MCE=y CONFIG_MICROCODE=m CONFIG_X86_MSR=m CONFIG_X86_CPUID=m CONFIG_NOHIGHMEM=y CONFIG_MTRR=y CONFIG_X86_UP_APIC=y CONFIG_X86_UP_IOAPIC=y CONFIG_X86_LOCAL_APIC=y CONFIG_X86_IO_APIC=y CONFIG_NET=y CONFIG_PCI=y CONFIG_PCI_GOANY=y CONFIG_PCI_BIOS=y CONFIG_PCI_DIRECT=y CONFIG_ISA=y CONFIG_PCI_NAMES=y CONFIG_EISA=y CONFIG_HOTPLUG=y CONFIG_PCMCIA=m CONFIG_CARDBUS=y CONFIG_TCIC=y CONFIG_I82092=y CONFIG_I82365=y CONFIG_SYSVIPC=y CONFIG_BSD_PROCESS_ACCT=y CONFIG_SYSCTL=y CONFIG_KCORE_ELF=y CONFIG_BINFMT_AOUT=m CONFIG_BINFMT_ELF=y CONFIG_BINFMT_MISC=m CONFIG_PARPORT=m CONFIG_PARPORT_PC=m CONFIG_PARPORT_PC_CML1=m CONFIG_PARPORT_SERIAL=m CONFIG_PNP=m CONFIG_ISAPNP=m CONFIG_BLK_DEV_FD=y CONFIG_BLK_DEV_XD=m CONFIG_PARIDE=m CONFIG_PARIDE_PARPORT=m CONFIG_BLK_DEV_LOOP=m CONFIG_BLK_DEV_NBD=m CONFIG_BLK_DEV_RAM=y CONFIG_BLK_DEV_RAM_SIZE=4096 CONFIG_BLK_DEV_INITRD=y CONFIG_MD=y CONFIG_BLK_DEV_MD=m CONFIG_MD_LINEAR=m CONFIG_MD_RAID0=m CONFIG_MD_RAID1=m CONFIG_MD_RAID5=m CONFIG_MD_MULTIPATH=m CONFIG_BLK_DEV_LVM=m CONFIG_PACKET=m CONFIG_NETLINK_DEV=m CONFIG_NETFILTER=y CONFIG_FILTER=y CONFIG_UNIX=y CONFIG_INET=y CONFIG_IP_MULTICAST=y CONFIG_IP_ADVANCED_ROUTER=y CONFIG_IP_MULTIPLE_TABLES=y CONFIG_IP_ROUTE_FWMARK=y CONFIG_IP_ROUTE_NAT=y CONFIG_IP_ROUTE_MULTIPATH=y CONFIG_IP_ROUTE_TOS=y CONFIG_IP_ROUTE_VERBOSE=y CONFIG_IP_PNP=y CONFIG_IP_PNP_DHCP=y CONFIG_IP_PNP_BOOTP=y CONFIG_IP_PNP_RARP=y CONFIG_NET_IPIP=m CONFIG_NET_IPGRE=m CONFIG_NET_IPGRE_BROADCAST=y CONFIG_INET_ECN=y CONFIG_SYN_COOKIES=y CONFIG_IP_NF_CONNTRACK=m CONFIG_IP_NF_FTP=m CONFIG_IP_NF_IRC=m CONFIG_IP_NF_QUEUE=m CONFIG_IP_NF_IPTABLES=m CONFIG_IP_NF_MATCH_LIMIT=m CONFIG_IP_NF_MATCH_MAC=m CONFIG_IP_NF_MATCH_PKTTYPE=m CONFIG_IP_NF_MATCH_MARK=m CONFIG_IP_NF_MATCH_MULTIPORT=m CONFIG_IP_NF_MATCH_TOS=m CONFIG_IP_NF_MATCH_ECN=m CONFIG_IP_NF_MATCH_DSCP=m CONFIG_IP_NF_MATCH_AH_ESP=m CONFIG_IP_NF_MATCH_LENGTH=m CONFIG_IP_NF_MATCH_TTL=m CONFIG_IP_NF_MATCH_TCPMSS=m CONFIG_IP_NF_MATCH_HELPER=m CONFIG_IP_NF_MATCH_STATE=m CONFIG_IP_NF_MATCH_CONNTRACK=m CONFIG_IP_NF_MATCH_UNCLEAN=m CONFIG_IP_NF_MATCH_OWNER=m CONFIG_IP_NF_FILTER=m CONFIG_IP_NF_TARGET_REJECT=m CONFIG_IP_NF_TARGET_MIRROR=m CONFIG_IP_NF_NAT=m CONFIG_IP_NF_NAT_NEEDED=y CONFIG_IP_NF_TARGET_MASQUERADE=m CONFIG_IP_NF_TARGET_REDIRECT=m CONFIG_IP_NF_NAT_LOCAL=y CONFIG_IP_NF_NAT_SNMP_BASIC=m CONFIG_IP_NF_NAT_IRC=m CONFIG_IP_NF_NAT_FTP=m CONFIG_IP_NF_MANGLE=m CONFIG_IP_NF_TARGET_TOS=m CONFIG_IP_NF_TARGET_ECN=m CONFIG_IP_NF_TARGET_DSCP=m CONFIG_IP_NF_TARGET_MARK=m CONFIG_IP_NF_TARGET_LOG=m CONFIG_IP_NF_TARGET_ULOG=m CONFIG_IP_NF_TARGET_TCPMSS=m CONFIG_IP_NF_ARPTABLES=m CONFIG_IP_NF_ARPFILTER=m CONFIG_VLAN_8021Q=m CONFIG_IPX=m CONFIG_IPX_INTERN=y CONFIG_BRIDGE=m CONFIG_NET_SCHED=y CONFIG_NET_SCH_CBQ=m CONFIG_NET_SCH_HTB=m CONFIG_NET_SCH_CSZ=m CONFIG_NET_SCH_PRIO=m CONFIG_NET_SCH_RED=m CONFIG_NET_SCH_SFQ=m CONFIG_NET_SCH_TEQL=m CONFIG_NET_SCH_TBF=m CONFIG_NET_SCH_GRED=m CONFIG_NET_SCH_DSMARK=m CONFIG_NET_SCH_INGRESS=m CONFIG_NET_QOS=y CONFIG_NET_ESTIMATOR=y CONFIG_NET_CLS=y CONFIG_NET_CLS_TCINDEX=m CONFIG_NET_CLS_ROUTE4=m CONFIG_NET_CLS_ROUTE=y CONFIG_NET_CLS_FW=m CONFIG_NET_CLS_U32=m CONFIG_NET_CLS_RSVP=m CONFIG_NET_CLS_RSVP6=m CONFIG_NET_CLS_POLICE=y CONFIG_NET_PKTGEN=m CONFIG_IDE=y CONFIG_BLK_DEV_IDE=y CONFIG_BLK_DEV_IDEDISK=y CONFIG_IDEDISK_MULTI_MODE=y CONFIG_BLK_DEV_IDECD=y CONFIG_BLK_DEV_IDETAPE=m CONFIG_BLK_DEV_IDEFLOPPY=m CONFIG_BLK_DEV_IDESCSI=m CONFIG_BLK_DEV_CMD640=y CONFIG_BLK_DEV_RZ1000=y CONFIG_BLK_DEV_IDEPCI=y CONFIG_IDEPCI_SHARE_IRQ=y CONFIG_BLK_DEV_IDEDMA_PCI=y CONFIG_IDEDMA_PCI_AUTO=y CONFIG_BLK_DEV_IDEDMA=y CONFIG_BLK_DEV_ADMA=y CONFIG_BLK_DEV_PIIX=y CONFIG_BLK_DEV_VIA82CXXX=y CONFIG_IDEDMA_AUTO=y CONFIG_BLK_DEV_IDE_MODES=y CONFIG_BLK_DEV_ATARAID=m CONFIG_BLK_DEV_ATARAID_PDC=m CONFIG_BLK_DEV_ATARAID_HPT=m CONFIG_SCSI=y CONFIG_BLK_DEV_SD=y CONFIG_SD_EXTRA_DEVS=40 CONFIG_CHR_DEV_ST=m CONFIG_CHR_DEV_OSST=m CONFIG_BLK_DEV_SR=m CONFIG_BLK_DEV_SR_VENDOR=y CONFIG_SR_EXTRA_DEVS=2 CONFIG_CHR_DEV_SG=m CONFIG_SCSI_DEBUG_QUEUES=y CONFIG_SCSI_MULTI_LUN=y CONFIG_SCSI_AIC7XXX=y CONFIG_AIC7XXX_CMDS_PER_DEVICE=253 CONFIG_AIC7XXX_RESET_DELAY_MS=15000 CONFIG_NETDEVICES=y CONFIG_DUMMY=m CONFIG_NET_ETHERNET=y CONFIG_HAPPYMEAL=m CONFIG_SUNGEM=m CONFIG_NET_VENDOR_3COM=y CONFIG_EL1=y CONFIG_EL2=y CONFIG_ELPLUS=y CONFIG_EL16=y CONFIG_EL3=y CONFIG_3C515=y CONFIG_VORTEX=y CONFIG_LANCE=y CONFIG_NET_VENDOR_SMC=y CONFIG_WD80x3=y CONFIG_ULTRA=y CONFIG_SMC9194=y CONFIG_NET_VENDOR_RACAL=y CONFIG_NI5010=m CONFIG_NI52=m CONFIG_NI65=m CONFIG_AT1700=m CONFIG_DEPCA=m CONFIG_HP100=m CONFIG_NET_ISA=y CONFIG_E2100=m CONFIG_EWRK3=m CONFIG_EEXPRESS=y CONFIG_EEXPRESS_PRO=y CONFIG_HPLAN_PLUS=m CONFIG_HPLAN=m CONFIG_LP486E=m CONFIG_ETH16I=m CONFIG_NE2000=y CONFIG_NET_PCI=y CONFIG_PCNET32=m CONFIG_ADAPTEC_STARFIRE=m CONFIG_AC3200=m CONFIG_APRICOT=m CONFIG_CS89x0=m CONFIG_TULIP=m CONFIG_DE4X5=m CONFIG_DGRS=m CONFIG_DM9102=m CONFIG_EEPRO100=y CONFIG_FEALNX=m CONFIG_NATSEMI=y CONFIG_NE2K_PCI=y CONFIG_8139CP=y CONFIG_8139TOO=y CONFIG_SIS900=m CONFIG_EPIC100=m CONFIG_SUNDANCE=m CONFIG_TLAN=m CONFIG_VIA_RHINE=m CONFIG_WINBOND_840=m CONFIG_ACENIC=m CONFIG_DL2K=m CONFIG_NS83820=m CONFIG_HAMACHI=m CONFIG_YELLOWFIN=m CONFIG_SK98LIN=m CONFIG_PLIP=m CONFIG_PPP=y CONFIG_PPP_ASYNC=y CONFIG_PPP_SYNC_TTY=y CONFIG_PPP_DEFLATE=y CONFIG_PPPOE=y CONFIG_SLIP=m CONFIG_SLIP_COMPRESSED=y CONFIG_SLIP_SMART=y CONFIG_SLIP_MODE_SLIP6=y CONFIG_NET_RADIO=y CONFIG_STRIP=m CONFIG_WAVELAN=m CONFIG_ARLAN=m CONFIG_AIRONET4500=m CONFIG_AIRONET4500_NONCS=m CONFIG_AIRONET4500_PNP=y CONFIG_AIRONET4500_PCI=y CONFIG_AIRONET4500_ISA=y CONFIG_AIRONET4500_I365=y CONFIG_AIRONET4500_PROC=m CONFIG_AIRO=m CONFIG_HERMES=m CONFIG_PLX_HERMES=m CONFIG_PCI_HERMES=m CONFIG_PCMCIA_HERMES=m CONFIG_AIRO_CS=m CONFIG_NET_WIRELESS=y CONFIG_RCPCI=m CONFIG_SHAPER=m CONFIG_NET_PCMCIA=y CONFIG_PCMCIA_3C589=m CONFIG_PCMCIA_3C574=m CONFIG_PCMCIA_FMVJ18X=m CONFIG_PCMCIA_PCNET=m CONFIG_PCMCIA_AXNET=m CONFIG_PCMCIA_NMCLAN=m CONFIG_PCMCIA_SMC91C92=m CONFIG_PCMCIA_XIRC2PS=m CONFIG_PCMCIA_XIRCOM=m CONFIG_PCMCIA_XIRTULIP=m CONFIG_NET_PCMCIA_RADIO=y CONFIG_PCMCIA_RAYCS=m CONFIG_PCMCIA_NETWAVE=m CONFIG_PCMCIA_WAVELAN=m CONFIG_AIRONET4500_CS=m CONFIG_INPUT=m CONFIG_INPUT_KEYBDEV=m CONFIG_INPUT_MOUSEDEV=m CONFIG_INPUT_MOUSEDEV_SCREEN_X=1024 CONFIG_INPUT_MOUSEDEV_SCREEN_Y=768 CONFIG_INPUT_JOYDEV=m CONFIG_INPUT_EVDEV=m CONFIG_VT=y CONFIG_VT_CONSOLE=y CONFIG_SERIAL=m CONFIG_UNIX98_PTYS=y CONFIG_UNIX98_PTY_COUNT=256 CONFIG_PRINTER=m CONFIG_LP_CONSOLE=y CONFIG_PPDEV=m CONFIG_BUSMOUSE=m CONFIG_ATIXL_BUSMOUSE=m CONFIG_LOGIBUSMOUSE=m CONFIG_MS_BUSMOUSE=m CONFIG_MOUSE=m CONFIG_PSMOUSE=y CONFIG_82C710_MOUSE=m CONFIG_PC110_PAD=m CONFIG_QIC02_TAPE=m CONFIG_INTEL_RNG=m CONFIG_NVRAM=m CONFIG_RTC=m CONFIG_AGP=m CONFIG_AGP_INTEL=y CONFIG_AGP_I810=y CONFIG_AGP_VIA=y CONFIG_AGP_AMD=y CONFIG_AGP_SIS=y CONFIG_AGP_ALI=y CONFIG_AGP_SWORKS=y CONFIG_AUTOFS_FS=m CONFIG_AUTOFS4_FS=m CONFIG_REISERFS_FS=m CONFIG_ADFS_FS=m CONFIG_AFFS_FS=m CONFIG_HFS_FS=m CONFIG_BFS_FS=m CONFIG_FAT_FS=y CONFIG_MSDOS_FS=y CONFIG_UMSDOS_FS=y CONFIG_VFAT_FS=y CONFIG_EFS_FS=m CONFIG_CRAMFS=y CONFIG_TMPFS=y CONFIG_RAMFS=y CONFIG_ISO9660_FS=y CONFIG_JOLIET=y CONFIG_MINIX_FS=y CONFIG_VXFS_FS=m CONFIG_NTFS_FS=m CONFIG_HPFS_FS=m CONFIG_PROC_FS=y CONFIG_DEVFS_FS=y CONFIG_DEVPTS_FS=y CONFIG_QNX4FS_FS=m CONFIG_ROMFS_FS=y CONFIG_EXT2_FS=y CONFIG_SYSV_FS=m CONFIG_UDF_FS=m CONFIG_UDF_RW=y CONFIG_UFS_FS=m CONFIG_UFS_FS_WRITE=y CONFIG_NFS_FS=y CONFIG_NFS_V3=y CONFIG_ROOT_NFS=y CONFIG_NFSD=m CONFIG_NFSD_V3=y CONFIG_SUNRPC=y CONFIG_LOCKD=y CONFIG_LOCKD_V4=y CONFIG_SMB_FS=m CONFIG_NCP_FS=m CONFIG_MSDOS_PARTITION=y CONFIG_SMB_NLS=y CONFIG_NLS=y CONFIG_NLS_DEFAULT="iso8859-1" CONFIG_NLS_CODEPAGE_437=m CONFIG_NLS_CODEPAGE_737=m CONFIG_NLS_CODEPAGE_775=m CONFIG_NLS_CODEPAGE_850=m CONFIG_NLS_CODEPAGE_852=m CONFIG_NLS_CODEPAGE_855=m CONFIG_NLS_CODEPAGE_857=m CONFIG_NLS_CODEPAGE_860=m CONFIG_NLS_CODEPAGE_861=m CONFIG_NLS_CODEPAGE_862=m CONFIG_NLS_CODEPAGE_863=m CONFIG_NLS_CODEPAGE_864=m CONFIG_NLS_CODEPAGE_865=m CONFIG_NLS_CODEPAGE_866=m CONFIG_NLS_CODEPAGE_869=m CONFIG_NLS_CODEPAGE_936=m CONFIG_NLS_CODEPAGE_950=m CONFIG_NLS_CODEPAGE_932=m CONFIG_NLS_CODEPAGE_949=m CONFIG_NLS_CODEPAGE_874=m CONFIG_NLS_ISO8859_8=m CONFIG_NLS_CODEPAGE_1250=m CONFIG_NLS_CODEPAGE_1251=m CONFIG_NLS_ISO8859_1=m CONFIG_NLS_ISO8859_2=m CONFIG_NLS_ISO8859_3=m CONFIG_NLS_ISO8859_4=m CONFIG_NLS_ISO8859_5=m CONFIG_NLS_ISO8859_6=m CONFIG_NLS_ISO8859_7=m CONFIG_NLS_ISO8859_9=m CONFIG_NLS_ISO8859_13=m CONFIG_NLS_ISO8859_14=m CONFIG_NLS_ISO8859_15=m CONFIG_NLS_KOI8_R=m CONFIG_NLS_KOI8_U=m CONFIG_NLS_UTF8=m CONFIG_VGA_CONSOLE=y CONFIG_VIDEO_SELECT=y CONFIG_MDA_CONSOLE=m CONFIG_FB=y CONFIG_DUMMY_CONSOLE=y CONFIG_FB_RIVA=m CONFIG_FB_CLGEN=m CONFIG_FB_PM2=m CONFIG_FB_PM2_FIFO_DISCONNECT=y CONFIG_FB_PM2_PCI=y CONFIG_FB_CYBER2000=m CONFIG_FB_VESA=y CONFIG_FB_HGA=m CONFIG_VIDEO_SELECT=y CONFIG_FB_MATROX=m CONFIG_FB_MATROX_MILLENIUM=y CONFIG_FB_MATROX_MYSTIQUE=y CONFIG_FB_MATROX_G100=y CONFIG_FB_MATROX_G450=m CONFIG_FB_MATROX_MULTIHEAD=y CONFIG_FB_ATY=m CONFIG_FB_ATY_GX=y CONFIG_FB_ATY_CT=y CONFIG_FB_ATY128=m CONFIG_FB_3DFX=m CONFIG_FB_VOODOO1=m CONFIG_FBCON_MFB=m CONFIG_FBCON_CFB8=y CONFIG_FBCON_CFB16=y CONFIG_FBCON_CFB24=y CONFIG_FBCON_CFB32=y CONFIG_FBCON_HGA=m CONFIG_FONT_8x8=y CONFIG_FONT_8x16=y CONFIG_SOUND=m CONFIG_SOUND_FUSION=m CONFIG_SOUND_CS4281=m CONFIG_SOUND_ES1371=m CONFIG_SOUND_ESSSOLO1=m CONFIG_SOUND_MAESTRO=m CONFIG_SOUND_MAESTRO3=m CONFIG_SOUND_VIA82CXXX=m CONFIG_SOUND_OSS=m CONFIG_SOUND_SGALAXY=m CONFIG_SOUND_CS4232=m CONFIG_SOUND_MSS=m CONFIG_SOUND_SB=m CONFIG_SOUND_AWE32_SYNTH=m CONFIG_SOUND_YM3812=m CONFIG_SOUND_OPL3SA1=m CONFIG_SOUND_OPL3SA2=m CONFIG_SOUND_YMFPCI=m CONFIG_DEBUG_KERNEL=y CONFIG_DEBUG_STACKOVERFLOW=y CONFIG_DEBUG_HIGHMEM=y CONFIG_DEBUG_SLAB=y CONFIG_DEBUG_IOVIRT=y CONFIG_MAGIC_SYSRQ=y CONFIG_DEBUG_SPINLOCK=y CONFIG_FRAME_POINTER=y CONFIG_ZLIB_INFLATE=y CONFIG_ZLIB_DEFLATE=y
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