xt_TCPMSS loading issue

xt_TCPMSS loading issue

[Jan Engelhardt]

Using iptables 1.4.0rc1(svn7083), iptables seems to have problems 
autoloading TCPMSS:

18:53 ichi:/ws/iptables # strace -e open ./iptables -t mangle -A OUTPUT 
-d 1.3.3.7 -p tcp --syn -j TCPMSS --clamp-mss-to-pmtu
open("/ws/iptables/extensions/libxt_tcp.so", O_RDONLY) = 3
open("/ws/iptables/extensions/libxt_TCPMSS.so", O_RDONLY) = 3
iptables: No chain/target/match by that name

18:53 ichi:/ws/iptables # modinfo xt_TCPMSS
filename:       
/lib/modules/2.6.23.1-900.ccj58-regular/kernel/net/netfilter/xt_TCPMSS.ko
alias:          ip6t_TCPMSS
alias:          ipt_TCPMSS
description:    x_tables TCP MSS modification module
author:         Marc Boucher <marc@mbsi.ca>
license:        GPL
srcversion:     F9280CB30B14724A70F943F
depends:        x_tables
vermagic:       2.6.23.1-900.ccj58-regular SMP mod_unload 586 

The aliases are there (a common source of errors is lacking these 
aliases). If I manually `modprobe xt_TCPMSS`, iptables succeeds. Any 
idea?

Re: xt_TCPMSS loading issue

[Patrick McHardy]

Jan Engelhardt wrote:
> Using iptables 1.4.0rc1(svn7083), iptables seems to have problems 
> autoloading TCPMSS:
> 
> 18:53 ichi:/ws/iptables # strace -e open ./iptables -t mangle -A OUTPUT 
> -d 1.3.3.7 -p tcp --syn -j TCPMSS --clamp-mss-to-pmtu
> open("/ws/iptables/extensions/libxt_tcp.so", O_RDONLY) = 3
> open("/ws/iptables/extensions/libxt_TCPMSS.so", O_RDONLY) = 3
> iptables: No chain/target/match by that name
> 
> 18:53 ichi:/ws/iptables # modinfo xt_TCPMSS
> filename:       
> /lib/modules/2.6.23.1-900.ccj58-regular/kernel/net/netfilter/xt_TCPMSS.ko
> alias:          ip6t_TCPMSS
> alias:          ipt_TCPMSS
> description:    x_tables TCP MSS modification module
> author:         Marc Boucher <marc@mbsi.ca>
> license:        GPL
> srcversion:     F9280CB30B14724A70F943F
> depends:        x_tables
> vermagic:       2.6.23.1-900.ccj58-regular SMP mod_unload 586 
> 
> The aliases are there (a common source of errors is lacking these 
> aliases). If I manually `modprobe xt_TCPMSS`, iptables succeeds. Any 
> idea?


Works fine for me. Does "modprobe ipt_TCPMSS" work?

Re: xt_TCPMSS loading issue

[Jan Engelhardt]

On Oct 31 2007 12:31, Patrick McHardy wrote:
>> If I manually `modprobe xt_TCPMSS`, iptables succeeds. Any idea?
>
> Works fine for me. Does "modprobe ipt_TCPMSS" work?
>
No, it does not, that is odd.

13:33 ichi:../misc/suser-jengelh # modprobe ipt_TCPMSS
WARNING: module 'xt_TCPMSS' is unsupported
FATAL: Module ipt_TCPMSS not found.

Ok, time to spank Novell... thanks :)