Im using a centos 6 server for gateway.
Ive tried inserting
[root@primary ~]# modprobe ip_nat_pptp
WARNING: Error inserting nf_conntrack_proto_gre (/lib/modules/2.6.32-431.17.1.el6.x86_64/kernel/net/netfilter/nf_conntrack_proto_gre.ko): Operation not permitted
WARNING: Error inserting nf_conntrack_pptp (/lib/modules/2.6.32-431.17.1.el6.x86_64/kernel/net/netfilter/nf_conntrack_pptp.ko): Operation not permitted
FATAL: Error inserting nf_nat_pptp (/lib/modules/2.6.32-431.17.1.el6.x86_64/kernel/net/ipv4/netfilter/nf_nat_pptp.ko): Operation not permitted
[root@primary ~]# modprobe ip_conntrack_pptp
FATAL: Error inserting nf_conntrack_pptp (/lib/modules/2.6.32-431.17.1.el6.x86_64/kernel/net/netfilter/nf_conntrack_pptp.ko): Operation not permitted
[root@primary ~]# lsmod
Module Size Used by
mpt3sas 189439 1
mpt2sas 186880 1
scsi_transport_sas 35652 2 mpt3sas,mpt2sas
raid_class 4516 2 mpt3sas,mpt2sas
mptctl 31784 1
mptbase 93647 1 mptctl
ipmi_devintf 7729 2
dell_rbu 9990 0
autofs4 26513 3
sit 10155 0
tunnel4 2943 1 sit
ipv6 318183 106 sit
dm_crypt 12862 0
ecb 2209 0
cbc 3083 0
sha256_generic 10361 0
twofish_x86_64 5297 0
twofish_common 14633 1 twofish_x86_64
aes_x86_64 7837 0
aes_generic 27609 1 aes_x86_64
tcp_diag 1041 0
inet_diag 8735 1 tcp_diag
cifs 293665 0
fuse 73530 0
tun 17095 0
nfnetlink_log 8718 0
xt_u32 1630 0
ipt_MASQUERADE 2466 22
nfnetlink_queue 8111 0
nfnetlink 4200 2 nfnetlink_log,nfnetlink_queue
xt_NFQUEUE 2213 0
xt_comment 1034 0
ipt_LOG 5845 5
ipt_ecn 1507 0
ipt_ECN 1955 0
xt_TRACE 1060 0
xt_iprange 2312 0
xt_string 1596 0
xt_connmark 1347 0
xt_connbytes 1704 0
xt_hashlimit 9685 0
xt_connlimit 3238 0
xt_TCPMSS 3445 0
xt_tcpmss 1607 0
xt_dscp 1831 0
xt_DSCP 2279 0
xt_mark 1057 0
xt_MARK 1057 0
xt_multiport 2700 0
xt_pkttype 1194 0
xt_quota 1439 0
xt_physdev 1741 0
xt_mac 1118 0
xt_limit 2118 5
xt_length 1322 7
xt_state 1492 98
nf_conntrack_sip 19779 0
nf_nat_ftp 3507 0
nf_conntrack_sane 5716 0
nf_conntrack_ftp 12913 1 nf_nat_ftp
nf_conntrack_netbios_ns 1323 0
nf_conntrack_broadcast 1471 1 nf_conntrack_netbios_ns
xt_conntrack 2776 0
ipt_REDIRECT 1840 0
xt_recent 7932 0
ipt_REJECT 2351 0
xt_owner 1252 0
iptable_raw 2264 0
iptable_mangle 3349 0
iptable_nat 6158 1
nf_nat 22759 4 ipt_MASQUERADE,nf_nat_ftp,ipt_REDIRECT,iptable_nat
nf_conntrack_ipv4 9506 101 iptable_nat,nf_nat
nf_conntrack 79758 15 ipt_MASQUERADE,xt_connmark,xt_connbytes,xt_connlimit,xt_state,nf_conntrack_sip,nf_nat_ftp,nf_conntrack_sane,nf_conntrack_ftp,nf_conntrack_netbios_ns,nf_conntrack_broadcast,xt_conntrack,iptable_nat,nf_nat,nf_conntrack_ipv4
nf_defrag_ipv4 1483 1 nf_conntrack_ipv4
iptable_filter 2793 1
ip_tables 17831 4 iptable_raw,iptable_mangle,iptable_nat,iptable_filter
xfs 1128471 0
exportfs 4236 1 xfs
ext3 240013 0
jbd 80858 1 ext3
uinput 7992 0
iTCO_wdt 7115 0
iTCO_vendor_support 3056 1 iTCO_wdt
microcode 112685 0
dcdbas 9219 0
usblp 11830 0
bnx2 81708 0
ses 6475 0
enclosure 8438 1 ses
sg 29350 0
serio_raw 4594 0
shpchp 32778 0
lpc_ich 12803 0
mfd_core 1895 1 lpc_ich
ioatdma 58130 15
dca 7101 1 ioatdma
i5000_edac 8739 0
edac_core 46581 3 i5000_edac
i5k_amb 5009 0
ext4 374917 4
jbd2 93427 1 ext4
mbcache 8193 2 ext3,ext4
sr_mod 15177 0
cdrom 39085 1 sr_mod
sd_mod 39069 5
crc_t10dif 1541 1 sd_mod
pata_acpi 3701 0
ata_generic 3837 0
ata_piix 24601 0
megaraid_sas 87145 5
usb_storage 49068 0
nouveau 995351 2
ttm 80590 1 nouveau
drm_kms_helper 44321 1 nouveau
drm 280012 4 nouveau,ttm,drm_kms_helper
i2c_algo_bit 5935 1 nouveau
i2c_core 31084 4 nouveau,drm_kms_helper,drm,i2c_algo_bit
mxm_wmi 1967 1 nouveau
video 20674 1 nouveau
output 2409 1 video
wmi 6287 2 nouveau,mxm_wmi
dm_mirror 14384 0
dm_region_hash 12085 1 dm_mirror
dm_log 9930 2 dm_mirror,dm_region_hash
dm_mod 84337 12 dm_crypt,dm_mirror,dm_log
[root@primary ~]#
Clients on LAN cant VPN using pptp
Re: Clients on LAN cant VPN using pptp
Fixed. The correct way in later Centos (6) is to add the modules in /etc/sysconfig/modules
[root@primary ~]# ls /etc/sysconfig/modules
bluez-uinput.modules ip_nat_pptp.modules nf_nat_proto_gre.modules
[root@primary ~]# cat /etc/sysconfig/modules/ip_nat_pptp.modules
#!/bin/sh
/sbin/modprobe ip_nat_pptp >/dev/null 2>&1
[root@primary ~]# cat /etc/sysconfig/modules/nf_nat_proto_gre.modules
#!/bin/sh
/sbin/modprobe nf_nat_proto_gre >/dev/null 2>&1
MUST set them to 755
MUST be called .modules extension
MUST contain #!/bin/sh
Then reboot your modules are then loaded and pptp passes
[root@primary ~]# lsmod
Module Size Used by
mpt3sas 189439 1
mpt2sas 186880 1
scsi_transport_sas 35652 2 mpt3sas,mpt2sas
raid_class 4516 2 mpt3sas,mpt2sas
mptctl 31784 1
mptbase 93647 1 mptctl
ipmi_devintf 7729 2
dell_rbu 9990 0
autofs4 26513 3
sit 10155 0
tunnel4 2943 1 sit
ipv6 318183 109 sit
dm_crypt 12862 0
ecb 2209 0
cbc 3083 0
sha256_generic 10361 0
twofish_x86_64 5297 0
twofish_common 14633 1 twofish_x86_64
aes_x86_64 7837 0
aes_generic 27609 1 aes_x86_64
tcp_diag 1041 0
inet_diag 8735 1 tcp_diag
cifs 293665 0
fuse 73530 0
tun 17095 0
nfnetlink_log 8718 0
xt_u32 1630 0
ipt_MASQUERADE 2466 22
nfnetlink_queue 8111 0
nfnetlink 4200 2 nfnetlink_log,nfnetlink_queue
xt_NFQUEUE 2213 0
xt_comment 1034 0
ipt_LOG 5845 5
ipt_ecn 1507 0
ipt_ECN 1955 0
xt_TRACE 1060 0
xt_iprange 2312 0
xt_string 1596 0
xt_connmark 1347 0
xt_connbytes 1704 0
xt_hashlimit 9685 0
xt_connlimit 3238 0
xt_TCPMSS 3445 0
xt_tcpmss 1607 0
xt_dscp 1831 0
xt_DSCP 2279 0
xt_mark 1057 0
xt_MARK 1057 0
xt_multiport 2700 0
xt_pkttype 1194 0
xt_quota 1439 0
xt_physdev 1741 0
xt_mac 1118 0
xt_limit 2118 5
xt_length 1322 7
xt_state 1492 99
nf_conntrack_sip 19779 0
nf_nat_ftp 3507 0
nf_conntrack_sane 5716 0
nf_conntrack_ftp 12913 1 nf_nat_ftp
nf_conntrack_netbios_ns 1323 0
nf_conntrack_broadcast 1471 1 nf_conntrack_netbios_ns
xt_conntrack 2776 0
ipt_REDIRECT 1840 0
xt_recent 7932 0
ipt_REJECT 2351 0
xt_owner 1252 0
iptable_raw 2264 0
iptable_mangle 3349 0
iptable_nat 6158 1
iptable_filter 2793 1
ip_tables 17831 4 iptable_raw,iptable_mangle,iptable_nat,iptable_filter
xfs 1128471 0
exportfs 4236 1 xfs
ext3 240013 0
jbd 80858 1 ext3
nf_nat_pptp 4653 0
nf_conntrack_pptp 12166 1 nf_nat_pptp
nf_conntrack_proto_gre 7003 1 nf_conntrack_pptp
nf_nat_proto_gre 3028 1 nf_nat_pptp
nf_nat 22759 6 ipt_MASQUERADE,nf_nat_ftp,ipt_REDIRECT,iptable_nat,nf_nat_pptp,nf_nat_proto_gre
nf_conntrack_ipv4 9506 102 iptable_nat,nf_nat
nf_conntrack 79758 18 ipt_MASQUERADE,xt_connmark,xt_connbytes,xt_connlimit,xt_state,nf_conntrack_sip,nf_nat_ftp,nf_conntrack_sane,nf_conntrack_ftp,nf_conntrack_netbios_ns,nf_conntrack_broadcast,xt_conntrack,iptable_nat,nf_nat_pptp,nf_conntrack_pptp,nf_conntrack_proto_gre,nf_nat,nf_conntrack_ipv4
nf_defrag_ipv4 1483 1 nf_conntrack_ipv4
uinput 7992 0
microcode 112685 0
iTCO_wdt 7115 0
iTCO_vendor_support 3056 1 iTCO_wdt
dcdbas 9219 0
ses 6475 0
enclosure 8438 1 ses
bnx2 81708 0
usblp 11830 0
serio_raw 4594 0
sg 29350 0
shpchp 32778 0
lpc_ich 12803 0
mfd_core 1895 1 lpc_ich
i5000_edac 8739 0
edac_core 46581 3 i5000_edac
i5k_amb 5009 0
ioatdma 58130 15
dca 7101 1 ioatdma
ext4 374917 4
jbd2 93427 1 ext4
mbcache 8193 2 ext3,ext4
sr_mod 15177 0
cdrom 39085 1 sr_mod
sd_mod 39069 5
crc_t10dif 1541 1 sd_mod
pata_acpi 3701 0
ata_generic 3837 0
ata_piix 24601 0
megaraid_sas 87145 5
usb_storage 49068 0
nouveau 995351 2
ttm 80590 1 nouveau
drm_kms_helper 44321 1 nouveau
drm 280012 4 nouveau,ttm,drm_kms_helper
i2c_algo_bit 5935 1 nouveau
i2c_core 31084 4 nouveau,drm_kms_helper,drm,i2c_algo_bit
mxm_wmi 1967 1 nouveau
video 20674 1 nouveau
output 2409 1 video
wmi 6287 2 nouveau,mxm_wmi
dm_mirror 14384 0
dm_region_hash 12085 1 dm_mirror
dm_log 9930 2 dm_mirror,dm_region_hash
dm_mod 84337 12 dm_crypt,dm_mirror,dm_log
[root@primary ~]#
[root@primary ~]# ls /etc/sysconfig/modules
bluez-uinput.modules ip_nat_pptp.modules nf_nat_proto_gre.modules
[root@primary ~]# cat /etc/sysconfig/modules/ip_nat_pptp.modules
#!/bin/sh
/sbin/modprobe ip_nat_pptp >/dev/null 2>&1
[root@primary ~]# cat /etc/sysconfig/modules/nf_nat_proto_gre.modules
#!/bin/sh
/sbin/modprobe nf_nat_proto_gre >/dev/null 2>&1
MUST set them to 755
MUST be called .modules extension
MUST contain #!/bin/sh
Then reboot your modules are then loaded and pptp passes
[root@primary ~]# lsmod
Module Size Used by
mpt3sas 189439 1
mpt2sas 186880 1
scsi_transport_sas 35652 2 mpt3sas,mpt2sas
raid_class 4516 2 mpt3sas,mpt2sas
mptctl 31784 1
mptbase 93647 1 mptctl
ipmi_devintf 7729 2
dell_rbu 9990 0
autofs4 26513 3
sit 10155 0
tunnel4 2943 1 sit
ipv6 318183 109 sit
dm_crypt 12862 0
ecb 2209 0
cbc 3083 0
sha256_generic 10361 0
twofish_x86_64 5297 0
twofish_common 14633 1 twofish_x86_64
aes_x86_64 7837 0
aes_generic 27609 1 aes_x86_64
tcp_diag 1041 0
inet_diag 8735 1 tcp_diag
cifs 293665 0
fuse 73530 0
tun 17095 0
nfnetlink_log 8718 0
xt_u32 1630 0
ipt_MASQUERADE 2466 22
nfnetlink_queue 8111 0
nfnetlink 4200 2 nfnetlink_log,nfnetlink_queue
xt_NFQUEUE 2213 0
xt_comment 1034 0
ipt_LOG 5845 5
ipt_ecn 1507 0
ipt_ECN 1955 0
xt_TRACE 1060 0
xt_iprange 2312 0
xt_string 1596 0
xt_connmark 1347 0
xt_connbytes 1704 0
xt_hashlimit 9685 0
xt_connlimit 3238 0
xt_TCPMSS 3445 0
xt_tcpmss 1607 0
xt_dscp 1831 0
xt_DSCP 2279 0
xt_mark 1057 0
xt_MARK 1057 0
xt_multiport 2700 0
xt_pkttype 1194 0
xt_quota 1439 0
xt_physdev 1741 0
xt_mac 1118 0
xt_limit 2118 5
xt_length 1322 7
xt_state 1492 99
nf_conntrack_sip 19779 0
nf_nat_ftp 3507 0
nf_conntrack_sane 5716 0
nf_conntrack_ftp 12913 1 nf_nat_ftp
nf_conntrack_netbios_ns 1323 0
nf_conntrack_broadcast 1471 1 nf_conntrack_netbios_ns
xt_conntrack 2776 0
ipt_REDIRECT 1840 0
xt_recent 7932 0
ipt_REJECT 2351 0
xt_owner 1252 0
iptable_raw 2264 0
iptable_mangle 3349 0
iptable_nat 6158 1
iptable_filter 2793 1
ip_tables 17831 4 iptable_raw,iptable_mangle,iptable_nat,iptable_filter
xfs 1128471 0
exportfs 4236 1 xfs
ext3 240013 0
jbd 80858 1 ext3
nf_nat_pptp 4653 0
nf_conntrack_pptp 12166 1 nf_nat_pptp
nf_conntrack_proto_gre 7003 1 nf_conntrack_pptp
nf_nat_proto_gre 3028 1 nf_nat_pptp
nf_nat 22759 6 ipt_MASQUERADE,nf_nat_ftp,ipt_REDIRECT,iptable_nat,nf_nat_pptp,nf_nat_proto_gre
nf_conntrack_ipv4 9506 102 iptable_nat,nf_nat
nf_conntrack 79758 18 ipt_MASQUERADE,xt_connmark,xt_connbytes,xt_connlimit,xt_state,nf_conntrack_sip,nf_nat_ftp,nf_conntrack_sane,nf_conntrack_ftp,nf_conntrack_netbios_ns,nf_conntrack_broadcast,xt_conntrack,iptable_nat,nf_nat_pptp,nf_conntrack_pptp,nf_conntrack_proto_gre,nf_nat,nf_conntrack_ipv4
nf_defrag_ipv4 1483 1 nf_conntrack_ipv4
uinput 7992 0
microcode 112685 0
iTCO_wdt 7115 0
iTCO_vendor_support 3056 1 iTCO_wdt
dcdbas 9219 0
ses 6475 0
enclosure 8438 1 ses
bnx2 81708 0
usblp 11830 0
serio_raw 4594 0
sg 29350 0
shpchp 32778 0
lpc_ich 12803 0
mfd_core 1895 1 lpc_ich
i5000_edac 8739 0
edac_core 46581 3 i5000_edac
i5k_amb 5009 0
ioatdma 58130 15
dca 7101 1 ioatdma
ext4 374917 4
jbd2 93427 1 ext4
mbcache 8193 2 ext3,ext4
sr_mod 15177 0
cdrom 39085 1 sr_mod
sd_mod 39069 5
crc_t10dif 1541 1 sd_mod
pata_acpi 3701 0
ata_generic 3837 0
ata_piix 24601 0
megaraid_sas 87145 5
usb_storage 49068 0
nouveau 995351 2
ttm 80590 1 nouveau
drm_kms_helper 44321 1 nouveau
drm 280012 4 nouveau,ttm,drm_kms_helper
i2c_algo_bit 5935 1 nouveau
i2c_core 31084 4 nouveau,drm_kms_helper,drm,i2c_algo_bit
mxm_wmi 1967 1 nouveau
video 20674 1 nouveau
output 2409 1 video
wmi 6287 2 nouveau,mxm_wmi
dm_mirror 14384 0
dm_region_hash 12085 1 dm_mirror
dm_log 9930 2 dm_mirror,dm_region_hash
dm_mod 84337 12 dm_crypt,dm_mirror,dm_log
[root@primary ~]#